Anyone know anything about M5's
25 March 2011, 10:09 PM
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Anyone know anything about M5's
Got a Bmw e39 M5 at work, Drove it about 500 yards and turned it off, Went back about 30 minutes later and when it started it sounded like the pistons were trying to make there way out of the block 
It literally sounded like metal to metal, I turned it off after about 5 seconds but haven't had time to investigate further so wondered if anyone had experienced something similar? There was no reason for it to do this and had been running perfectly up until now, Obviously there is oil etc....
Any ideas people 
It literally sounded like metal to metal, I turned it off after about 5 seconds but haven't had time to investigate further so wondered if anyone had experienced something similar? There was no reason for it to do this and had been running perfectly up until now, Obviously there is oil etc.... Any ideas people
25 March 2011, 10:32 PM
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26 March 2011, 05:30 PM
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Wish I'd of seen this at work, I would of checked the brake lights
Seriously though, Done a compression test today amongst other things and all seems ok, Nothing showing on the diagnostic either and now it will start and run for about a second or 2 then cut out 
26 March 2011, 11:03 PM
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By the sounds of it, you have had a catestrophic failiure of one of the vanos units.
However, my crystal ball is on the fritz and trying to diagnose an engine knock without seeing the car physically isn't an easy task.
The first thing you need to check will be the oil level.
Then the oil pressure.
Then the rocker covers need to come off and the timing has to be checked.
If all this is well, you'll need a gt1 to be able to activate a vanos sytem test.
However, my crystal ball is on the fritz and trying to diagnose an engine knock without seeing the car physically isn't an easy task.
The first thing you need to check will be the oil level.
Then the oil pressure.
Then the rocker covers need to come off and the timing has to be checked.
If all this is well, you'll need a gt1 to be able to activate a vanos sytem test.
28 March 2011, 06:50 PM
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Turned out to be duff cam sensor, Replaced and all is good, Never had symptoms like that from a cam sensor before though, Learn something new everyday
28 March 2011, 09:18 PM
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Sensor won't always give a CEL, sometimes it's scalling goes out the window and the car retards or advances timing by massive levels instead of tiny ones.