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The VERY early M50 coil packs had some problems (archive)

[ Follow Ups ] [ 5-series (E34) Message Board ] [ Msg. Board FAQ ]

Posted by MicahO on August 29, 2001 at 08:09:48:

In Reply to: Yes, a little oil in #6, but small amount (more) posted by Chris Rose on August 29, 2001 at 07:52:01:

but they were sorted out by the end of 1990/early 1991. You should be able to inspect yours for problems in wiring or the coil pack itself, but for your car (a 95 with only 66K miles) the coil packs SHOULD be fine.

Read down at the bottom of this page for some info - you would want to check the bottom of the coil pack, near the spark plug, for breakage and corrosion, but yours should be okay.http://www.unofficialbmw.com/all/engine/m50_coil_problems.html. The packs run about $60 each from BavAuto, possibly cheaper elsewhere, if I remember correctly. I am on my originals at 104K with no issues, just dont let them fall when you are doing the plugs!



I've also been told that the coil-packs can develop cracks in them, allowing moisture (or oil) inside. Does anyone besides dealer sell the coil packs? About how much are they?

Misses related to the VC gasket generally happen when the plug holes fill with oil, causing the spark from the coil to partially ground out to the block (thru the oil). If the plug holes are clean and dry, you probably don't need a new gasket. You are getting close to the mileage at which you would need one, though....


Replacing the valve cover gasket this weekend on my wifes 95 525 with 66K on the odo. What else should I replace while I'm in there?

It misses on startup until you start to accelerate. I'm thinking a leaking valve cover gasket may be the culprit. I've already replace the plugs of course. If that doesn't fix it then it's on to the O2 sensor (although I think it would run poor all the time if that were it).

Thanks






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