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Bmw e39 m54 engine defective cam sensors make car impossible to start because very low compression>

Started car and 3-4 seconds died,I tried restarting but engine cranked faster than normal (sound like plugs were removed completely). I removed valve cover and saw camshafts were turning,lifters were also moving up/down,no broken timing chain. Some mechanics say lifters got stuck,camshaft sensors bad...etc. Kngine has dual vanos,and wondered if its solenoid went bad,skipped a tooth on the timing chain,no oil pressure supply to dual vanos....??.Need HELP!!!,please. Thnx, Alberto

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Lots of guesswork here.
Firstly, have you checked for compression on all cylinders.
If compression is low or non exisistant then you have a major problem probably caused by the timing chain slipping and causing damage to the valves /pistons etc
I would do this first.
Roger

Posted on Apr 24, 2017

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Posted on Jan 02, 2017

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Engine,when cranking,sounds like an engine cranking with spark plugs removed;like no compression.


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