View Full Version : what's the factory spark plug gap setting on the M10?


themadhatter
10-31-2004, 04:26 PM
....anybody know?

-Ron

Oahu320iS
10-31-2004, 04:44 PM
I don't know about factory but I run Autolite AR52's gapped at .050. Of course you will also need a hotter coil and big honkin' wires.

Aloha,
Mike H

BMWJNKY
10-31-2004, 04:55 PM
....anybody know?

-Ron
If you have a stock engine the gap is .027-.030 The Haynes book says the gap should be .025 but my car didn't want to run with the gap that small. I regaped the plugs to .028 and my car ran fine. I also recomend using Bosch WR9DC or WR9DS spark plugs.

jbob
11-01-2004, 05:26 AM
from autox320 on bmw320i.com:
The rule of thumb on plug gaps is to open them up in .002" increments at a time. When the car begins to lose power or slow down then go back .001-.002" and this in most cases is the optimum gap.
Remembering that the Ignition Unit, plug brand as well as heat range, cap and/or rotor styles and FUEL TYPE or brand will change the optimum spark plug gap settings.

start w/ 0.030 and work from there. IIRC, my bosch silver plugs are gapped to 0.034.

btw, never ever get platinum spark plugs for the m10.....especially the bosch +4's

themadhatter
11-01-2004, 06:54 PM
thanks for all the great tips fellas. I purchased a set of standard autolite plugs and champion wires for the car. the cap and rotor are next when I'm back in town in January. I'm still tossing the idea around about keeping the original 230,000 mile motor or dropping in an LSx family motor.....either way, I want to fix this motor up for now.

thanks again!

-Ron

Bill
11-02-2004, 07:58 PM
are you kidding me???????????????????? Dont put that shit in your car!

themadhatter
11-02-2004, 09:40 PM
um...ok. for $4 for the plugs and $10 for the wires...what's the diff? I'm probably not keeping that motor for long...remember? ;)

-Ron

BMWJNKY
11-02-2004, 10:25 PM
Bosch WR9DC's are $.99 each at AutoZone, and at least get NGK wires. Autolites and champion :rolleyes

Bill
11-03-2004, 02:08 AM
Bosch WR9DC's are $.99 each at AutoZone, and at least get NGK wires. Autolites and champion :rolleyes
What he said!

Anyways have a safe trip if i dont talk to you before you leave tomorrow!

uberpanzer
11-03-2004, 07:37 AM
OK, I thought bill was talking about not putting a V8 in the car....but I guess he WAS talking about those autolite plugs!

themadhatter
11-03-2004, 03:45 PM
bah...I'm gonna piss you all off when I go ahead and install a tornado intake spinner thingy. :stickoutt

Bill - answer your phone!!!

-Ron

Bill
11-04-2004, 02:39 AM
Ah! I called your cell and talked to you honey bun then called your house and it just rang and rang. Your like over the Atlantic right now you crazy bastard.

PS. that guinness event was a blast, but to bad you were going back tonight.

themadhatter
11-04-2004, 08:55 AM
next time my friend.

I'm in Italy right now, coffee kicks ass over here.

I'll give you a holler from Africa over the weekend. ....I think I know of a guy with an 'extra' E36 6spd gear box in Togo....:devillook

-Ron