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#1 (permalink) Old 10-17-2010, 07:06 PM
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Question HELP, Bad Compression/Good Leak Down

2000 323i

I have a misfire on cylinder six (6) and a ticking noise under the hood. Doesn't sound like rod noise. Ran a compression test and cyl. six (6) failed. It is only 90 psi while the other five are 190 psi. Ran a leak down test and it passed. Only 4% and only crankcase noise. No evidence of leaking valves. I can't figure out what would present these two symptoms at the same time.

Anyone got any ideas?
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#2 (permalink) Old 10-18-2010, 09:18 PM
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Well I think I got the answer.

Using a depth gauge and measuring TDC on several cylinders #6 is 8.23mm lower in the cylinder than the rest. Sooooo......It's got a bent rod or broken wrist pin on something that is leaving it lower in the cylinder and thus the lower compression with a good leak down test.

It's the worst news I could get. Now do I rebuild the motor or is there a good source for a short block?
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#3 (permalink) Old 10-18-2010, 09:58 PM
OMFG another one!?
 
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witeshark is just really nice witeshark is just really nice witeshark is just really nice witeshark is just really nice witeshark is just really nice
Not an easy question... Best of luck to you...

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