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Re: 1989 750iL running on 11 Cylinders. (archive)

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Posted by Kevin on October 09, 2001 at 10:47:41:

In Reply to: 1989 750iL running on 11 Cylinders. posted by Kevin on October 08, 2001 at 20:56:08:

I think Rainman is on the right track. If this problem were caused by anything in the lower end of the engine, you'd hear a real racket... I'd venture to guess that you might even see a con-rod coming through the side of the engine. If there is no racket (or suspicious looking con rod sticking out the side of the motor), then the likely situation is loss of any lift on the valve or valves to that cylinder (Rainman's hypothesis). Unfortunately tearing down the top end on the 12 is not a simple job given that the intake manifolds and associated hardware have to be removed to take the valve covers off. I think you're in for a reasonably substantial top end tear down just to verify what needs to be replaced. In order to minimize downtime, you'll want to make sure you have a good mechanic who has ready access to a supply of m70 parts.


My E32 750iL has just been diagnosed with no compression whatsoever on #1. I have recently replaced the transmission and the car itself is in great shape. (Even with 155K miles)
Any advise?

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