Crankshaft Stuck - BMW Forum - BimmerWerkz.com
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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#1 (permalink) Old 04-03-2009, 03:59 AM
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Crankshaft Stuck

I'm trying to replace the cylinder head on my 87 325is but when I tried to line up the TDC, I can not turn the crankshaft. This is the fourth or fifth time I replaced a cylinder head but this is the first time I'm having trouble turning the crankshaft. Could it be the pistons got rusted? Coolant was mixed with oil when I drained the oil and the car been sitting for 2 months after the head gasket blown. Anybody got any idea why the crankshaft got stuck? The car is 5-speed. Your advices/comments are greatly appreciated.

89 325iC 5sp
90 325iC Auto
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#2 (permalink) Old 04-03-2009, 10:23 AM
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roll it back and fourth in gear, that should fix your problem.
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#3 (permalink) Old 04-03-2009, 11:56 AM
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Thanks for your advice. I tried rolling it in first gear couple of days ago but still stuck. I will try to roll it again tonight and see if it work. Thanks

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#4 (permalink) Old 04-03-2009, 12:12 PM
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Pistons won't get rusted to that point in 2 months. Was it still running when you removed the head?



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#5 (permalink) Old 04-03-2009, 01:14 PM
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Ok try lubing the engine and then roll it,best luck.
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#6 (permalink) Old 04-04-2009, 03:01 PM
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No, it was not running when I took the head off, in fact, it died on the freeway while I was driving have to towed it back home. Sat on the street for 2 months before I have time to work on it. I'm going to give it a try now and I'll update you in a few hours. Thanks.

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#7 (permalink) Old 04-05-2009, 04:10 AM
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Do you know if the Timing belt snapped? If so, your block is locked and you're better off getting a new engine. Good luck.



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#8 (permalink) Old 04-05-2009, 06:10 PM
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so you are saying that you can't turn the crankshaft with the cylinder head off? that would be a serious thing
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#9 (permalink) Old 04-09-2009, 12:14 PM
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No, the timing belt did not break, it's one piece when I took it off. The car overheated before it broke down on the freeway. When I drained the motor oil, coolant came out first for about 5 second before any oil started coming out. To lube the engine is to pour motor oil on the pistons?

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#10 (permalink) Old 04-10-2009, 08:58 AM
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If you had collant coming out of your oil, your head gasket is shot and your engine is seized. There is no ammount of lubing that will unsieze those pistons.

I advise you to take it to a mechanic so he can give you an assesment of how much it's gonna cost to get a new engine.



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