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Any ideas with problem.

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I have found a m5 with this problem and wondered if anyone has had this faul before ?

2005 e60 m5. Part of the clutch broke off and took the flywheel and crank sensor with it. These have been replaced. Now the car cranks over and will not run. Compression test has been done and the compression is down on one bank even readings across cylinders. Reckons the Vanos is holding the valves open?

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7 hours ago, Mojo Jojo said:

That's a common symptom of no signal from the crank angle sensor.

 

As that's the bit that got smashed, I'd check the sensor, flywheel/reluctor ring and wiring. 

Would it also cause the low compression?

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Nope, it'll just stop or mistime the spark. It's just something I'd rule out before exploring other possibilities.

 

I usually find the bit that's stopping my engine running, is the bit I literally just fucked up a minute ago. :D

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I read about a similar vehicle where the clutch did something similar and it needed a new engine.

 

If the crank sensor has had it then when cranking over the RPM needle will not move up. If the crank sensor is working then this should rise as the engine turns over.

 

cheers

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