hi folks i am thinking of getting a 91 850i ...what should i look out for when i look at the car?
any specific stuff that likes to go out?

wow nice collection, i love the Merc and the Porsche

wow nice collection, i love the Merc and the Porsche
oooogh don't say that... i will have to sell the merc in order to buy the 850
but thank you:)

I've read that they are electrical nightmares.

i Love my 8 series its a classic and an excellent car, if you buy an good well cared for example, there should be no problems. I would recommend the v8 as it has 32v and more advanced technology.

The 1991 850 is a good choice because of the M70 V12 engine. It is a simpler unit when it comes to troubleshooting (no knock sensors, only 2 O2 sensors instead of 4, and a bigger variety of performance chips - generally less than $200). If you are wanting an 8 series, go with the V12, otherwise you will ALWAYS be 4 cylinders short. The most important thing is the maintenance. Check to see if it has a solid service history, if all the major wear items have been takien care of, and do the Pre-buying Inspection (can be found on www.e31faq.com (http://www.e31faq.com/) ). A good piece of advice: these V12's can easily go 200,000 - 300,000 miles (mine currently is at 200,000) so the mileage should not be the most important issue. A 175,000 mile car with service records and tenacious upkeep will be alot better than one with 75,000 and a "sketchy" service history. Most major wear items will start needing replacement at around 75,000 miles.

Find the car that is right for you, and don't jump at the first "great bargain" - you will be spending $5000 -$10,000 to get that one in good shape....

I've read that they are electrical nightmares.You read wrong!


Look at it, Drive it and Nigotiate to get the deal that's good for you, Don't drive it too far because then it's too late. There addicting! The stares and compliments you get before you buy is too much, Be sure and check out the Link in the above post to go down the inspection list, It will make purchasing a lot easier, I had 2 560's, They need to be spoiled a little less than them.

You read wrong!




Why don't you clarify it for me then..


:devillook:)



http://forums.bimmerforums.com/forum/showthread.php?t=707799&referrerid=&highlight=850+electrical+problems

I haven't had any in 11 years! When a coil or maf go's out, It's because it's old or worn but far as Electrical problems other than the car sitting to long and drainging the batteries, That's it! What have you heard to assume it's true?

Your Link states the myth to be untrue also?

Many people in the UK also say that 8s have electrical problems and are very expensive to run, however its untrue. As long as you keep them serviced and checked there a dream to run.

I've read that they are electrical nightmares.

oh boy here we go again :help

i Love my 8 series its a classic and an excellent car, if you buy an good well cared for example, there should be no problems. I would recommend the v8 as it has 32v and more advanced technology.

The V12 is the way to go. It is the more simple and reliable type motor of the two plus you get more linear power too. The real problem with any BMW is the lack of space in the engine compartment to work on them especially when you get more than six cylinders and the price of parts/labor.:rolleyes

Also the sad true is that all newer cars are going as electrical/electronically controlled as possible to better regulate cars systems. Eventually there will be brake-by-wire and steer-by-wire systems to go along with drive-by-wire systems just like airplanes, which statistically are safer then cars.:confused:rolleyes

i would love to get a v 12. however, to find one in good shape and decently priced seems quite a challenge. i don't want to go trans am. one in florida would be the thing to look for.
how rare are manual 850? if there are any?

A couple of threads down and in Cali. (http://forums.bimmerforums.com/forum/showthread.php?t=901889)

i would love to get a v 12. however, to find one in good shape and decently priced seems quite a challenge. i don't want to go trans am. one in florida would be the thing to look for.
how rare are manual 850? if there are any?Here's one below also. He's not too far from me, If you could have the owner meet me half way, I would go through it for you!
http://cgi.ebay.com/ebaymotors/BMW-8-Series-1991-BMW-850i-V12-rare-6-speed-Red-clean-and-fast_W0QQitemZ120203834696QQihZ002QQcategoryZ6130Q QssPageNameZWDVWQQrdZ1QQcmdZViewItem (http://rover.ebay.com/rover/1/711-1751-2978-71/1?AID=5463217&PID=2518995&loc=http%3A%2F%2Fcgi.ebay.com%2Febaymotors%2FBMW-8-Series-1991-BMW-850i-V12-rare-6-speed-Red-clean-and-fast_W0QQitemZ120203834696QQihZ002QQcategoryZ6130Q QssPageNameZWDVWQQrdZ1QQcmdZViewItem)

Why don't you clarify it for me then..


:devillook:)



http://forums.bimmerforums.com/forum/showthread.php?t=707799&referrerid=&highlight=850+electrical+problems



So where in that thread did you see the words "Electrical Nightmare" or anything even pointing in that direction?

Typically the V8s will be more expensive (because of age) rather than less. I would think that finding one them for a decent price would be more difficult-

Also no chance of getting a manual 840!

i would love to get a v 12. however, to find one in good shape and decently priced seems quite a challenge. i don't want to go trans am. one in florida would be the thing to look for.
how rare are manual 850? if there are any?

Hey ya never know....I found one 80miles down I-4 from me. There are a few runnin around. Would never have expected. Was actually considering a trip to PA to look at one when this one turned up out of no where. There are at least 3 in the Tampa area that I have seen recently so they are there...

I haven't seen this type of interest of buying them in a while, Lots of buyers lately! Good luck and keep us posted if you deicide on one.

hmmm... i am not too hot about red. and like i said a little closer to florida.
but i might consider her just for the 6 shift

i actually am eyeballing that one 1992 850 i in texas.
the owner called me the other day. and informed me about a big meet in april
here in florida. he is willing to bring her there. might be a good place to buy a car.

qnother option is this one...
but i don't like the way the engine looks
and those rims are to throw up for... but the seller wants to trade her for my merc...
the tfront is all messed up and she got a rebuild/salvage title

i actually am eyeballing that one 1992 850 i in texas.
the owner called me the other day. and informed me about a big meet in april
here in florida. he is willing to bring her there. might be a good place to buy a car.That's the SE 8 Gathering, Nice big event held last year in Mt Dora, The price of 8's get higher and sale faster when it gets warmer! If you could see it sooner based on it being "The one" You might want to get to it first or ask a member on this board that lives near it to have a GOOD look at it for you, I would!

Just a thought,

Go with a V12 6spd, they are the best set up when it comes to the E31, I did test drive the auto's and V8's but trust me nothing better than a V12 and 6 spd. No disrespect to the auto/V8 guys but if your gonna make the jump might as well go all the way.

But if you have the ability to get a CSI, there i nothing better than that in the US as far as E31's go.

That's the SE 8 Gathering, Nice big event held last year in Mt Dora, The price of 8's get higher and sale faster when it gets warmer! If you could see it sooner based on it being "The one" You might want to get to it first or ask a member on this board that lives near it to have a GOOD look at it for you, I would!

Just a thought,
the owner is a member, i think and he did a lot of work on her
http://satservice.com/850_92/
but if someone would, could have a look at her , now that would be awesome

Go with a V12 6spd, they are the best set up when it comes to the E31, I did test drive the auto's and V8's but trust me nothing better than a V12 and 6 spd. No disrespect to the auto/V8 guys but if your gonna make the jump might as well go all the way.

But if you have the ability to get a CSI, there i nothing better than that in the US as far as E31's go.


The CSi is a excellent example that will be worth alot based on it having low miliage! A tuned Auotmatic E31 will blow the doors off of a CSi!

Respectfully,

the owner is a member, i think and he did a lot of work on her
http://satservice.com/850_92/
but if someone would, could have a look at her , now that would be awesome

looks like a nice well maintained car.........

it does, doesn't she...

The v12s a nice lovely motors, imigine a transplant of the new v12 with 48v and 6litres into a 850, wow!

That engine needs to be played with first by tuners, It has less torque than are engines!

the owner is a member, i think and he did a lot of work on her
http://satservice.com/850_92/
but if someone would, could have a look at her , now that would be awesome
I have personally driven this car and almost bought it myself, but I am married and the boss said she wanted a Mercedes SL, instead. This car is very smooth and stable (only took it to 120mph...)

....any other questions??

... but what about an 1994 840ci Automatic with 102k for $14,500. Look at autotrader #11422754

... but what about an 1994 840ci Automatic with 102k for $14,500. Look at autotrader #11422754
from what i hear is that the v12 is superior in all aspects.
also, for that price that car would need to be immaculate.

For all the v12 fans check this out!
http://carscoop.blogspot.com/2007/06/bmw-350i-e30-3-series-with-350hp-bmw.html

Go with the V12!! Otherwise you will ALWAYS be 4 cylinders short! If you are going to drive the flagship, DRIVE the flagship!

V8 was only BMW's response to getting more folks into the 8series, much like the V6 Camaros, Mustangs and Firebirds....

For all the v12 fans check this out!
http://carscoop.blogspot.com/2007/06/bmw-350i-e30-3-series-with-350hp-bmw.html
i read an article in a magazine , when they build this. i think back in 91 or so

The v12 is a good choice a simple motor, the extra 4 pots, tuneable and displacement, however i prefer the v8 as it has 4 cams and purely for the engine sound.

For example the sl55 or the sl65, the v8 sounds amazing.

I do love v12 as well especailly quad cams and 48 valves.

It just depends which you prefer.

Looking at the collection of cars you have, a v12 will be a nice addition!

i always fancied some v12. but jaguar are no-no when it comes to driveability.
and merc are very heavy.
and then there is 'the ultimate driving machine':)

Utt oh! Silvil war.... I heard the saying "Ultimate Drivng Machine" was brought about from the 850i, Did i hear wrong?

buy mine

is this what you see on eelbay when you find an 850 with salvage/rebuildable title?:eek:
like before and after?

i always fancied some v12. but jaguar are no-no when it comes to driveability.
and merc are very heavy.
and then there is 'the ultimate driving machine':)

Having a Jaguar XJS and a BMW 850 the "ultimate driving machine" title certainly goes to the Jag IMHO. The 8 is like modern cars and the XJS is like old cars... as one was engineered in late `80s while the other in early `70s.

When "driving" is just cruising and daily drives, the 8 is superior in every way.

Having a Jaguar XJS and a BMW 850 the "ultimate driving machine" title certainly goes to the Jag IMHO. The 8 is like modern cars and the XJS is like old cars... as one was engineered in late `80s while the other in early `70s.

When "driving" is just cruising and daily drives, the 8 is superior in every way.
i once had a range rover. and i now know why the english like to drink warm beer.
because lucas not just makes car electronics, they also build refrigerators.
english cars are not known for their reliability.

...i now know why the english like drink warm beer.
because lucas not just makes car electronics, they also build refrigerators...

:lol Nicely put!

Stock XJS's with the auto box are the furthest thing from a 'driver's car.'

Stock XJS's with the auto box are the furthest thing from a 'driver's car.'
but they do look awesome... at least the ladies love 'em:)

I have konis and stickier wheels some minor weight reduciton (no 5mph bumpers and the interior was taken out to be redone and then it kinda got forgotten :stickoutt) the 8 is however completley stock.

Compared to this particular 850 this particular XJS stays flatter through the corner and has better steeringwheel feel.

On a distance of 1 km (0,62 miles), from a standing start, the 850 had a top speed of 206kmph/128.0 mph whereas the jag ran 200kmph/124.3mph. The 8 probably brakes better.. I have the older XJS without the ABS. I like the XJS having an LSD.

The 850 is a better car and faster but the jag is just more fun (depending on cirumstances of course).

i once had a range rover. and i now know why the english like to drink warm beer.
because lucas not just makes car electronics, they also build refrigerators.
english cars are not known for their reliability.

Not ALL english cars....................I had a Triumph Dolomite that I couldnt kill.............was driving it on a blown headgasket for months............

Not ALL english cars....................I had a Triumph Dolomite that I couldnt kill.............was driving it on a blown headgasket for months............

I have driven the XJS for a year now with the main bearings spinning louder than the demuffeled engine. :alright

I have driven the XJS for a year now with the main bearings spinning louder than the demuffeled engine. :alright
lucky for me, i am not going to buy a jaguar...lol

these are awsome cars one of my favorites aside from the 3 and 5 series bimmers.

i am in the vero beach area does anyone in the area have an 850?
i would like to drive one and see how i like it

^^^ANy luck finding one? My dad is in the market looking for one as well. Keep the forum posted what you get and pix please!

i have one i am eyeballing but i'll have to wait until april for the big gtg in mt dora.
there are quite a few out there. however, most of them are from owners , who try to get their investment full or partially back. and are therefore way overpriced.
there are others that are dirt cheap, have rebuild salvage titles and are worth ...mickey mouse. try to find one in your area and take her for a spin. it's a heavy car. and the performance is not as rocket like, as you might think.

Mines is Rocket like!

rocket like happens from 25-30 mph on up..

very "rocket" in that neighborhood

More like 10mph with the new Cams, Port & Polish, Headers, Mafs and few others, This car is a auto also, It will now spin the tires hard if i punch it.

i am in the vero beach area does anyone in the area have an 850?
i would like to drive one and see how i like itGo drive this one, It's looks awesome! You should also be able to do some negotiating if it's the one...

http://cgi.ebay.com/ebaymotors/BMW-8-Series-CiA-V12-97-COUPE-PREMIUM_W0QQcmdZViewItemQQcategoryZ6130QQihZ011QQi temZ320209418541QQrdZ1QQsspagenameZWDVW#lg (http://rover.ebay.com/rover/1/711-1751-2978-71/1?AID=5463217&PID=2518995&loc=http%3A%2F%2Fcgi.ebay.com%2Febaymotors%2FBMW-8-Series-CiA-V12-97-COUPE-PREMIUM_W0QQcmdZViewItemQQcategoryZ6130QQihZ011QQi temZ320209418541QQrdZ1QQsspagenameZWDVW%23lg)

from what i hear is that the v12 is superior in all aspects.
also, for that price that car would need to be immaculate.

5spd 40s are better then 4spd 50s in most respects other then price.

5spd 40s are better then 4spd 50s in most respects other then price.
i hear you...but apart from price, aren't 5 speed 40 even rarer than 4 speed 50's?

Go drive this one, It's looks awesome! You should also be able to do some negotiating if it's the one...

http://cgi.ebay.com/ebaymotors/BMW-8-Series-CiA-V12-97-COUPE-PREMIUM_W0QQcmdZViewItemQQcategoryZ6130QQihZ011QQi temZ320209418541QQrdZ1QQsspagenameZWDVW#lg (http://rover.ebay.com/rover/1/711-1751-2978-71/1?AID=5463217&PID=2518995&loc=http%3A%2F%2Fcgi.ebay.com%2Febaymotors%2FBMW-8-Series-CiA-V12-97-COUPE-PREMIUM_W0QQcmdZViewItemQQcategoryZ6130QQihZ011QQi temZ320209418541QQrdZ1QQsspagenameZWDVW%23lg)
i saw her and i called them up... i think they are more in the car collecting business, rather than selling them. at least as far as the pricing is concerned.
:eek:

i Love my 8 series its a classic and an excellent car, if you buy an good well cared for example, there should be no problems. I would recommend the v8 as it has 32v and more advanced technology.

Prit singh is correct! The V8 has 32v & more advanced Tech & is easy/cheaper to Maintenance/Mod.

One of my good friends is the assistant Service manager at BMW of Dallas, Service #s don't Lie!!! More $$ have been earned on the V12s. They rarely see V8s.

Both have very strong engines. You will need more money with a V12! However, you need to buy what you want!!

840ways to C :redspot

There is a reason for that. There are very few (and I mean very few) BMW V12 guys to begin with, and most of them only see a few at most. I had similar discussions with both the Service Director and Parts Director at Autobahn BMW. I have been through no less than 5 "V12 Experts", but have found only one, and he hasn't steered me wrong yet. The "more" money thing is mostly a result of poor or lacking maintenance and proliferating the myth.

There is a reason for that. There are very few (and I mean very few) BMW V12 guys to begin with, and most of them only see a ffew at most. I had similar discussions with both the Service Director and Parts Director at Autobahn BMW. I have been through no less than 5 "V12 Experts", but have found only one, and he hasn't steered me wrong yet. The "more" money thing is mostly a result of poor or lacking maintenance and proliferating the myth.

There are more V12 running around! (Checks: Cars.com, AutoTrader or even Ebay). You mean there are very few V8s. I know several individual with 8 series in the metroplex. I only know of two 840Ci (We are both in Irving). All the other are 850i/Ci. Matter-of-fact. I know of a family (brothers) who have 4 V12 (one CSI).

There are fewer V8s.

840ways to C :redspot

"You will need more money with a V12!"...only if you don't know what you're doing or don't have a good mechanic, (and those ARE hard to come by!). I think properly maintained, either motor is equal. The only thing wrong with the 840 is it's always 4-short!!

There are more V12 running around! (Checks: Cars.com, AutoTrader or even Ebay). You mean there are very few V8s. I know several individual with 8 series in the metroplex. I only know of two 840Ci (We are both in Irving). All the other are 850i/Ci. Matter-of-fact. I know of a family (brothers) who have 4 V12 (one CSI).

There are fewer V8s.

840ways to C :redspot

No, I meant to say "there are very few V12 mechanics"

No, I meant to say "there are very few V12 mechanics"

TxGR8White,

You are very correct on that side!! That would explain some of the maintenance cost!!

840ways to C :redspot

No, I meant to say "there are very few V12 mechanics"

I notice; that, you like me have not added the aftermarket Wheel yet! I am going 19" 8.5 F & 9.5 R in April.

I will keep the original wheels (originality-Collectibility). I will have them Sand Blasted & Repainted (Original).

I see you do have the Front Chin (Spoiler)!!! I am still debating on that one! However, my wife says it time for a wheel upgrade!!

840ways to C :redspot

I started with 18" M-parallels and the ride was too harsh (BILSTEIN Sport and EIBACH Springs), so I went with the optional 17" Style 5 2-piece wheels (staggered set-up). Bought them new from Germany and I like them ALOT. Think twice about the 19" combo... that ride is VERY hard, and there is little sidewall to absorb all of the little road-hickeys we have here in Dallas.
If you want to see what the ride is like, let me know and we can arrange something.

There are more V12 running around! (Checks: Cars.com, AutoTrader or even Ebay). You mean there are very few V8s. I know several individual with 8 series in the metroplex. I only know of two 840Ci (We are both in Irving). All the other are 850i/Ci. Matter-of-fact. I know of a family (brothers) who have 4 V12 (one CSI).

There are fewer V8s.

840ways to C :redspot

Fewer V8's until you include 540, 740, 745, new 750 and X5. There are even 4.4 BMW V8's in some Range Rovers.

Fewer V8's until you include 540, 740, 745, new 750 and X5. There are even 4.4 BMW V8's in some Range Rovers.
And Morgans.

And let us not forget the early Bentley Green Label.

from what i see there might quite a few followers of the 91 v8 around.
compared to the v12 lovers.
so what else is better a bout the v8's ,apart from the price?

from what i see there might quite a few followers of the 91 v8 around.
compared to the v12 lovers.
so what else is better a bout the v8's ,apart from the price?
There was no 91 V8. Also, early M60 V8s are a mess to say the least unless you got one that was properly taken care of by BMW.

5spd M62 840s are just as fast as 4spd 850s. They are also generally cheaper to run and get better gas millage, especially if they don't have S EDC. As such they make great daily drivers. The interiors (seats) are a tad nicer as well, though the changes are very minor/subtle.

The best of the automatics however is the M73 5spd 850Ci. Now that is the 8 to have if you want an auto! Don't get me wrong, the V8s are nice and all, but even my heart is for a V12....as if you couldn't tell based on my avatar and sig. Despite what my heart says, I can't just make naive statements about the late 840s.

I have driven both the 4 speed and the 5 speed V12's. The 4 speed is a nicer, "crisper" drive, the 5 speed is too "Cadillac" for my taste. Also, the M70 lends itself to more options when it comes to performance upgrades (chips, etc.). The M73 motor has more parts to it (knock sensors, extra set of 02 sensors, etc)...

The m73 is more reliable the m70. You never of Dk issues in later cars.

Swapping in a 3.15 or higher makes the cars come alive.

agreed, I am currently rebuilding 5 sets of DK motors for the M70. What I said was that the M70 lends itself to more options (also less expensive) when it comes to upgrading...

No argument there. I wish there were more options for those m73s.

The m73 is more reliable the m70. You never of Dk issues in later cars. Please tell, I know of severl 200 and 300k mile M70's, It's also the chosen engine for perfomance building out of the two! Less options for the 73, How is the 73 more reliable? Tia!

I have one with 181k, new head gaskets and all the new goodies that go with that job (for about $1250. in parts), and it runs like brand new. There was no wear and the motor was clean on tear-down. I would take a 12 over the 8 in a NY second! 8=4short!

...you're just biased because you have 36 cylinders of fun (I would be too...)

Please tell, I know of severl 200 and 300k mile M70's, It's also the chosen engine for perfomance building out of the two! Less options for the 73, How is the 73 more reliable? Tia!

With proper maintenance, of course the engine will last. Obviously, is same basic design. The latter has more to due with aftermarket availability as well as OBC I vs II issues.

The 73 has less inherent problems and will be in the shop less often. Other then the occasional intake manifold gasket, the engine is very durable. I will repeat, you will never hear of DK issues with the M73. Think about it for a minute, the engine is the successor of the M70. One of the design goals was increased reliability. Do you really think the engineers took a break and said eh' lets make an inferior motor? :confused We are not talking about Mercedes vs BMW here, we are talking in the family.

Of course V12s are better. You are speaking to the choir there. In an ideal world, I would have nothing but V12s. But removing the emotional element, the 5spd V8 cars are an even match for the 4 spd V12s. That is a fact.

But removing the emotional element, the 5spd V8 cars are an even match for the 4 spd V12s. That is a fact.
I agree. It's removing that "emotional element" that's the problem!!

It's amazing how many diss the V8 for no good reason :nono

no diss really, but if you want to drive a V12 car, drive a V12 car. The V8 in the 8 series was just a reaction from BMW to try and get a larger audience than just the 12...

...either engine will give you problems if you don't take care of it.

...either engine will give you problems if you don't take care of it.
Quite true. All the more reason to get a car with a complete history!

It's amazing how many diss the V8 for no good reason :nonoI didn't care when buying mines, I just wanted the body! There's also a trillion hi performance parts ready available for the V8, You can pick up a Super charger at several places without kissing up to get it! Different story with the V12 unless you got a pot of gold hanging around.

I went a different route for the increased performance. Since you would have to add quite a bit of horsepower ($$$$) for a heavy car like this, I just went out and bought a Z06 for the speed. Much simpler - it already came with hyper-performance out of the box...

Take that silly lic plate off!!!!!!!!!

Of course V12s are better. You are speaking to the choir there. In an ideal world, I would have nothing but V12s. But removing the emotional element, the 5spd V8 cars are an even match for the 4 spd V12s. That is a fact.

But not the 6 spd manual V12s.:rolleyes

My m70 is coming on 200K miles and really driving me insane trying to fix the valve cover and intake gaskets.:mad

My 200,000 mile E31 M70 V12 is a joy - very smooth... (intakes and valve cover gasket done 20,000 miles ago). Looking forward to the next 200,000....

I didn't care when buying mines, I just wanted the body! There's also a trillion hi performance parts ready available for the V8, You can pick up a Super charger at several places without kissing up to get it! Different story with the V12 unless you got a pot of gold hanging around.

I have a 97 840... and bro I gotta say I'm not happy with the aftermarket hi-performance parts available. Please... point me in the right direction.
Yo,
Rod

Rod, I'm with you on that...

I'd love a nice drop-in super charger application. I'm talking the real deal for 840 not for 540. I'm ready to do it, but right now I don't have the time for all the complications.

Also, those that have done this have chosen to keep the deal on an esoteric level.

Oh well.

But I say... One fine day... Even for a +4000 lb beast like E31. It deserves it. I love the screaming sound from the engine bay and I could only imagine what it would be like with a little forced induction action.

Cheers

PS. Z06 out the box is def. pure bang for tha buck.

it must be the low production no.s of the 850's that are not very apealing to the aftermarket.
but on the other hand... there is enough as it is that can go wrong with these v12.
i am thinking about sheered headbolts and all that stuff.

sheered headbolts were a problem on early V12 engines, much like the alumasil/nikasil problem on the V8's. The bottom end is virtually indestructable on the V12 (and that is where you want it with supercharger/turbo set-up).Several folks here with high mileage V12's that report absolutely no wear on the bottom...(maybe only when they go to the Dealer for Service!)

it must be the low production no.s of the 850's that are not very apealing to the aftermarket.
but on the other hand... there is enough as it is that can go wrong with these v12.
i am thinking about sheered headbolts and all that stuff.There's lots of parts to upgrade a V12, It's a awesome mortor to upgrade, The motor has been held back by it's poor head design, Forced induction is one way to make them breathe, V12 means Pay!$$$$$$$$$$--- What sheered headbolts and all what stuff?

Ceedee- If you end up buying mine, it has all new top end. New style headbolts, etc. No worries! This is where you start to see the service history is key.

Along time ago I installed a S-trim S/C on my Ford 5.8. I got rid of the head bolts and went with ARP head stud kit, guess what no more problems with bolts.

I wonder if you could use a head stud kit on the m70 V12?

8eights, the early V12s would sheer the head bolts espically when you added more power to them that is probably why PumpTSI has head studs instead for his beast.:drool:

TxGR8White, you can add me to the list of people with no bottom end wear at 200K miles.

Not the 8 Series V12's! Thats the 7 series your talking about. I think your in the wrong house!---)

Well PumpTSI's is a 92 and it still has head studs to coup with the added power just in case. Plus the E32 7s and E31 8s are amazing similiar, hell even the Bentley service and repair manuals use pictures of the 8s for reference in the 7s book.

I agree! Lots of the parts are similar, The engines are not exact though.

True but that could be because BMW switched the control moduale from a Bosch Monotonic 1.2 system to the 1.7 system in 1990, on both models, with sodered in chips instead of the easily changed plug and play chips on the older 750 models. I personally have not noticed any major differences between the engines myself but I could be wrong and there aren't many 850s that come around here.:(

I guess I am going to start my research on the Head Studs as the S/C possibility for my 6L is coming close.

I guess I am going to start my research on the Head Studs as the S/C possibility for my 6L is coming close.

:drool::drool: You rock!

I guess I am going to start my research on the Head Studs as the S/C possibility for my 6L is coming close.

BTDT! The block will not support ARP studs, contrary to want works with other engines, the M70 series block doesn't have the necessary depth to withstand the additional pull that studs (of any manufacturer) would exert. It will pull the stud right out of the block and or crack the block in the process. It will work but not to the extent that a high reflected C/R by lots of boost will cause! One other point to consider is that the 6.0L bored block (86mm) only has 5mm spacing between the cylinders and that is not a lot for cylinder-to-cylinder sealing with high effective C/R unless other exotic means ("O" ringing, etc.) is done. With sleeves ????? Even less rigidity and higher degree of difficulty maintaining sealing.

Studs will work, but-- for how long???

P.S. Dinan did NOT use studs on any of their turbo kits, even the stage III systems

P.S. Dinan did NOT use studs on any of their turbo kits, even the stage III systems

The S3 is a totally different animal......its a 5.7 stroker motor using a CSi block or a bored and sleeved M70 unit. It includes head studs,forged pistons,ported heads and intakes, cams, headers, larger injectors, knock sensors, boost guages,wastegates, bypass valves,intercooler hard pipes and a 2.75" straight thru exhaust system.
Tranny has an external cooler, heavy duty clutch packs and solenoids, 2800 stall converter, HD internal components, shift kit, custom chips and a HD driveshaft and Ujoints.
Suspension is HD sway bars front and rear along with stiffer springs, camber plates and HD links.
Brakes are Euro CSi full floating with 4 piston M calipers.
Rear end has been switched out for a LSD unit with HD shafts.
Car runs 14 psi on each turbo.

Just repeating what PumpedTSI said.

I want one as well. I found this one for dirt cheap. If you read the features and options the guy has no idea what he has.
http://cgi.ebay.com/ebaymotors/1991-BMW-850i-Mint-Metallic-Blue_W0QQitemZ170187681138QQcmdZViewItem?hash=item 170187681138

I have a customer that has a a nice six speed for sale on my site
www.e31parts.com (http://www.e31parts.com) $14k should do it a bargin for a car of this quality
Jim

I have a customer that has a a nice six speed for sale on my site
www.e31parts.com (http://www.e31parts.com) $14k should do it a bargin for a car of this quality
Jim
aren't they trying to sell the car since quite some time now? it's a red one, if i am not mistaken , right?