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3-Series (E21, E30) Chat relating to the BMW 3-Series from 1975-1983 and 1984-1991 line. Specific models: BMW 315, BMW 316, BMW 318, BMW 318i, BMW 320/4, BMW 320i, BMW 320/6, BMW 323i, BMW 320i. E30 Family models include: BMW 325e, BMW 325i, BMW 325is, BMW 325ix.

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Old 03-25-2009, 11:13 AM   #1 (permalink)
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Replaced Head, rough idle and lots of white smoke

Hello everyone,

My 88 325is was sitting since 2005 (at least, that was the registration expiration). I replaced the head (apparently the timing belt had been snapped by the previous owner) only to find that there is a rough idle that sounds like a misfire on every cycle (if not 2-3 misfires).

The engine runs nice and even at about 2k+ rpm's.

Also, at all rpm's there is a substantial plume of white smoke from the exhaust. I have not replaced the gas as of yet.

What is going wrong???
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Old 03-25-2009, 11:41 AM   #2 (permalink)
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I'm asking under the assumption that it is not an issue with the head nor gaskets as both were replaced new.

Other issues, i.e. fuel or air? vacuum?

Help!
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Old 03-25-2009, 12:27 PM   #3 (permalink)
OMFG another one!?
 
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Is there a sign of water in the oil, or oil floating in the coolant? I'm not sure the head gasket is sealing well.
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Old 03-25-2009, 05:44 PM   #4 (permalink)
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The smoke stopped for no apparent reason this afternoon; and I've become fairly convinced it's a vacuum issue.

I'll keep you posted!
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Old 03-25-2009, 09:56 PM   #5 (permalink)
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yeah, I'd just run it for awhile...could be nothing more than moisture burning off. good luck
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Old 03-26-2009, 05:59 PM   #6 (permalink)
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Thanks!
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