528i M52 Engine - Plastic Coolant Lines Under Intake Manifold

[Bimmer Ese]

I'm normally a E46/E53 kind of guy, so I'm learning as I go with this 1999 528i that's been sitting in my driveway for the past month. I'm addressing a coolant leak that was seeping from the two plastic water hoses that run near and underneath the intake manifold. I've successfully removed the plastic water hose that goes from the rear of the water pump area to the hose that goes to the auxiliary water pump, but the second one that runs along the head, so I have to remove the intake manifold to gain access to the rear nut? I did a search, and saw some other pics of the removal of these hoses, but I'm trying to save time by not removing the intake manifold.

Thanks,
Daniel

[ElleShooTiger]

Remove the manifold, its just the way these engines are built.

[EricP]

I am convinced every E39 on the planet has this leak. I think mine does as well.. removing the intake manifold is the way

[Bimmer Ese]

In the words of Mater, "dag gum"! I really didn't want to rip off that intake.

I was surprised to see how rotted and gunky the ends of these two hoses were. Then again, after 240,XXX miles, I wouldn't expect any less.

[BMWknight]

REcently had mine done too. Taking off intake manifold is usually a must. I hate how crappy those hoses are!

[Jason5driver]

Check out this tread:
http://forums.bimmerforums.com/forum....php?t=1583925

Thanks!
Jason

[dumblucky]

ahh mine are new



while your in there you might to do a little overhaul of various lines,

all that to find this bugger



while im on the subject , im new to bimmers but i read up on ccv replacent and this coolant line the OP is reffering to and it seems to me that the first thing you do when you get one of these engine is learn to take the intake off, so many numerous parts to get too omg

[av8r4aa]

Just placed my thousand dollar order for all new coolant pipes and hoses,CCV, gaskets,
And anything else I think should be done every 13 years.
It's time for the coolant system overhaul.
Starter and alternator while I am in there.

[truckman95]

yea I just did both of these lines myself. not too bad but once the manifold is out of the way its pretty straight forward. I replaced a few other hoses and vac lines as well. I feel much better knocking that little project out.

[Bimmer Ese]

Thanks for the info guys. I yanked a intake manifold out of a E46 to replace the starter, so I'm hoping the E39 will have a little more room. I took in this car in for a broken water pump pulley and shredded belts (car belongs to a lady at work). Then, it led to a leaking water pump, then swelled up water hoses from a power steering leak near the aux water pump, broken hoses for the CCV, then the oil filter housing gasket and now, the two plastic water hoses. The more I dig, the more crap I find. I just want this car gone!

[Jason5driver]

Thanks for the info guys.
I yanked the intake manifold out of an E46 to replace the starter.
So, I'm hoping the E39 will have a little more room.

I took this car in for a broken water pump pulley and shredded belts (car belongs to a lady at work).
Then, it led to a leaking water pump, then swelled up water hoses from a power steering leak near the aux water pump, broken hoses for the CCV, then the oil filter housing gasket, and now, the two plastic water hoses.

The more I dig, the more crap I find.
I just want this car gone!

Yep...
ALL of that you listed is pretty typical IMO...
Also, be aware that most of those problems are attributed to a failed CCV system...

Here is my thread talking about the CCV:
CCV Replacement FYI - M54
( 1 2 3 4 5 ... Last Page)
Jason5driver

And, another thread talking about further problems with the CCV and car IF the CCV system is NOT addressed:
CCV, Oil Pan Gasket, & Fuel Pump Failure Related? ( 1 2)
Jason5driver

Same thread title, but on BimmerFest with more/ different information:
CCV, Oil Pan Gasket, & Fuel Pump Failure Related? ( 1 2)
Jason5driver

Also, a lot of these things are typical problems if maintenance is not kept up on these cars IMO...

Thanks!
Jason

[Bimmer Ese]

I'm maintained her car for the past 50,000 miles. She drives like a bat out of hell, but have to give props to the car that it's lasted all these years. The rest of the cooling system was replaced in early 2010.

The car has an exhaust leak so that will be next on the list to troubleshoot. I think it may be a blown exhaust manifold gasket.

[Bmwe39528i1998]

My bmw is 528i 1998/05

I believe water inlet pipe under the manifold is part # 11531705210

Now for the m52 engine of 1998/05, many websites like fcpeuro etc tell me that the other pipe is only for post 1998/09

However based on bmw.ca website, the part fits my car
Water pipe part # 11537502525

Can someone confirm if both of these will fit on 528i 1998/05?

Also, are there any metal aftermarket parts to replace these plastic pipes?

- - - Updated - - -

For the second part number, there's an aluminum URO pipe. However it says that it's for 528i from 09/98

I'm not sure why it says that and it it will or won't fit in 528i 1998/05

- - - Updated - - -

URO007947

- - - Updated - - -

I found this pipe on ebay.
For some reason it's out of stock almost everywhere.
Not sure if there was a design flaw or why they stopped producing it in aluminum.
I'm also wondering why is it only one of the two pipes what is available in aluminum...

https://www.ebay.ca/itm/Upgraded-Met...-127632-2357-0

[effduration]

in 9/1998 they started using the M52TU engine. With a 5/1998 production month, you should have the M52 engine...they are quite different, and the cooling hoses are very different.

You should plug your car's VIN into RealOEM.com and see what hoses you need.
Enter VIN
select Browse parts
select Engine - Engine cooling - Cooling hoses

[ross1]

My bmw is 528i 1998/05

I believe water inlet pipe under the manifold is part # 11531705210

Now for the m52 engine of 1998/05, many websites like fcpeuro etc tell me that the other pipe is only for post 1998/09

However based on bmw.ca website, the part fits my car
Water pipe part # 11537502525

Can someone confirm if both of these will fit on 528i 1998/05?

Also, are there any metal aftermarket parts to replace these plastic pipes?

- - - Updated - - -

For the second part number, there's an aluminum URO pipe. However it says that it's for 528i from 09/98

I'm not sure why it says that and it it will or won't fit in 528i 1998/05

- - - Updated - - -

URO007947

- - - Updated - - -

I found this pipe on ebay.
For some reason it's out of stock almost everywhere.
Not sure if there was a design flaw or why they stopped producing it in aluminum.
I'm also wondering why is it only one of the two pipes what is available in aluminum...

https://www.ebay.ca/itm/Upgraded-Met...-127632-2357-0

I'd avoid that Uro pipe(even if it would fit) as I would venereal disease. The OE style plastic is available from aftermarket suppliers, Reinz, etc. Expect to replace again in another decade or so.
Here is a diagram of parts appropriate for your pre TU 9/98 engine; http://bmwfans.info/parts-catalog/E3...m_water_hoses/ Beginning with the '99 model year the engine was changed. The M52TU(technical update)employs variable valve timing on exhaust as well as intake now. This redesign of the timing case changed the way the cooling hoses attach, the previous versions will not work with TU engines and vise versa.
It's a fools errand to replace one or two items under the intake while it is off. Do ALL the hoses, including vacuum, the CCV, clean the idle control valve. Am I forgetting anything, boys?

[Bmwe39528i1998]

Thanks Effduration, I was trying to find it with my vin on realoem and for some reason I couldn't, it just wasn't there.
Good to know about the change that happened from M52 to TU!

Ross thanks for your link. It has the part I didn't see on realoem.
Part # 11531433059 I believe is the one I need.
I'll avoid Uro and order from the dealer instead.
Of course I will replace all cooling components.
I'm also planning on replacing m52 manifold with m50 at the same time.
It's the pipes I was having problem finding.

Here's why I was confused.
Part # 11537502525 is then for TU engine right?

According to bme website, it fits pretty 98/05 cars

[Bmwe39528i1998]

Ross does the M52 have 1 or 2 pipes under manifold?
On the link you provided, I only found one pipe, # 11531433059

What about BMW 11531705210?

[Jason5driver]

Ross does the M52 have 1 or 2 pipes under manifold?
On the link you provided, I only found one pipe, # 11531433059

What about BMW 11531705210?

I believe the M52 only has 1 heater pipe ...

https://www.realoem.com/bmw/enUS/sho...diagId=11_1555

[Bmwe39528i1998]

I don't know if this picture is correct.

Part # 11531705210 is showing as one that fits as well even on

BMW 528i
1997 BMW 528i HVAC Heater Pipe
1998 BMW 528i HVAC Heater Pipe
1999 BMW 528i HVAC Heater Pipe
2000 BMW 528i HVAC Heater Pipe

https://www.fcpeuro.com/products/bmw...705210#fitment

But it's not on the picture.

[Jason5driver]

I don't know if this picture is correct.

Part # 11531705210 is showing as one that fits as well even on

BMW 528i
1997 BMW 528i HVAC Heater Pipe
1998 BMW 528i HVAC Heater Pipe
1999 BMW 528i HVAC Heater Pipe
2000 BMW 528i HVAC Heater Pipe

https://www.fcpeuro.com/products/bmw...705210#fitment

But it's not on the picture.

Right , RealOEM doesn't show -210 pipe for the M52 ...
It is greyed out ...

https://www.realoem.com/bmw/enUS/sho...diagId=11_2638




I think this is the pipe you need ...
https://www.fcpeuro.com/products/bmw...co-11531433059
It's number 5 in the realOEM diagram above , post #18 ...

[Bmwe39528i1998]

I agree, definitely need part 11531433059

Kinda curious what 11531705210 is for.

[Jason5driver]

I agree, definitely need part 11531433059

Kinda curious what 11531705210 is for.

It’s one of the pipes on the M54 , I believe …

[Bmwe39528i1998]

I agree. I changed them both on E53 M54 a year ago or so. Let me dig up the part number.
Why it is showing compatible with 528i everywhere (bmw.ca, fcpeuro, ecstunning etc) is weird.

[Jason5driver]

I agree. I changed them both on E53 M54 a year ago or so. Let me dig up the part number.
Why it is showing compatible with 528i everywhere (bmw.ca, fcpeuro, ecstunning etc) is weird.

Because those guys aren’t specific . They just see “E39” …
That’s why you need to look it up on RealOEM , or just remove the part off the car and read the part number stamped on the part .

[Bmwe39528i1998]

Looked up previous order for E53 2002 M54
PArt # 11531705210
This straight pipe is the same part # as the one I mentioned above for the straight pipe.
So I guess they're listing it in error for 528i 1998.
I know for a fact I installed it and 11537502000 (second pipe which is angular) on E53

I can't believe fcpeuro, ecstunning and bmw dealership made such a major error in their listing