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BMW M3 Maintenance and Repair

228 messages,  Last post on Nov 05, 2009 at 9:24 PM

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What is this discussion about? BMW M3, Coupe, Convertible


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#224 of 228
Re: e46 m3 maintenance [sal4ever] by gmonkies
May 08, 2009 (11:04 pm)
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Replying to: sal4ever (May 08, 2009 11:15 am)

That is the oil pressure regulator on the passenger side of the block. It requires a flat short head to remove. It's kinda tight so you will need a flex wrench with a flat head socket. Becarefull not to strip the grove on the regulator. If you can't get it off then you will have no choice but to take the exhaust manifold off for more room.
 
In any case, my friend just gave me another rubber O-ring from his O-ring box, no BMW parts required unless you want to pay the dealer extra $ for the same O-ring that you can get from the parts store. Feel free to let me know if you need anymore help.
#225 of 228
Changing spark plug for my M3 by gmonkies
Jun 10, 2009 (5:09 pm)
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I was driving on Cruise Control and suddenly the motor choked for a sec. 15 minutes later, check engine light came on and when I got off the highway, the motor was running rough like a miss fire. Shut the car off and the check engine went away but still runs rougher than normal and lost of power.
 
It has 84K on it right now, not sure if the spark plug was changed before I bought it. Hopefully it just needs a new plug.
  
In any case, the bentley manual does not show the m3 set up for changing spark plug. It does not have a bolt that holds down the individual ignition coil like the other 3 series.
After I separate the ignition wire harness wire from the ignition coil, does the coil just pull up/out? The coil is pretty tight in there, not sure if there's anything else I need to do or just man handle it. Hopefully once I fix replace the plugs, it will stop miss firing and running rough
 
If it was my honda, I'll just yank it out but always more fearful when it comes to working on the bimmer.
 
Please Advice!!!
#226 of 228
2008 M3-Rear Grinding Metal Noise by jjohnjohn
Oct 31, 2009 (7:24 pm)
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Issue:
 
Every morning steering right to back out or steering sharp right moving forward, there is a grinding metal noise coming from the rear. An example of the noise would be as if one was to move a very heavy couch with four wooden legs a very short distance over concrete floors. Weird example but that is the first thing that pops in my mind. Or another example would be as if the wheel was about to fall off the axle and the titled wheel is grinding against the axle.
 
It only happens with SHARP right turns. But once the car is warmed up, the noise does not happen again.
 
Any ideas why the noise? solutions?
 
I thought it was a lack of oil for the slip differential, but the dealer changed it out and still makes the noise, only in the morning.
 
Thanks for any feedback
 
-john
#227 of 228
Re: 2008 M3-Rear Grinding Metal Noise [jjohnjohn] by fedlawman
Nov 01, 2009 (7:00 am)
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Replying to: jjohnjohn (Oct 31, 2009 7:24 pm)

I would say it is the gear oil - but not a lack of oil. In the morning, the oil has settled to the bottom of the case and it's cold/thick. Once it's stirred up into the gears and warm, your noise goes away.
 
I wouldn't expect the noise to be that severe sounding though....
#228 of 228
Re: 2008 M3-Rear Grinding Metal Noise [jjohnjohn] by roadburner
Nov 05, 2009 (9:24 pm)
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Replying to: jjohnjohn (Oct 31, 2009 7:24 pm)

LSDs are sometimes noisy when cold; it's the nature of the beast.

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