B9 , Exhaust camshaft Vanos position control - Page 5 - BMW M5 Forum and M6 Forums
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post #41 of 107 Old 18th December 2016, 07:00 PM Thread Starter
vallibirgiss
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Hmmm i thought i should be able to move them , as was before i took it all apart

I've tried wiggleing it with the wrench but they are just stuck
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post #42 of 107 Old 18th December 2016, 07:20 PM
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Quote:
Originally Posted by vallibirgiss View Post
Hmmm i thought i should be able to move them , as was before i took it all apart

I've tried wiggleing it with the wrench but they are just stuck
If they do not even wiggle, then I agree, something is amiss. I would disassemble and re-assemble.

--Peter
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post #43 of 107 Old 18th December 2016, 09:04 PM
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The new spring plates will make adv/ret the cams much more difficult with a wrench. Presume you have the timing spot on now? Try turning the crank with a 32mm a few times, then try retarding the cams at cyl 1 tdc to re-check your marks. Also if you loosen 3 of each of the 6 hub bolts a bit can you adv/ret the cams with a wrench ?
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post #44 of 107 Old 19th December 2016, 10:20 PM Thread Starter
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Turned out it needed a lot of wiggleing but they are loose and everythings fine (timing spot on)

but then i put everything back together, everything went nicely ,but the B9 code is still there

New spring plates , new vanos solenoids o rings, new cps , tried swaping boards and cps but the code still is on Bank 1.
Getting pretty frustrated now , it must be some kind of a electrical problem
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post #45 of 107 Old 19th December 2016, 11:50 PM
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There was a recent thread on CPS electrical problem. Within the last 2-3 months. Can't remember the OP....
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post #46 of 107 Old 20th December 2016, 01:12 AM
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It could be one other thing that I forgot about. Sorry now is not the time to mention it. The time to bring it up was when the covers were off. I only remember reading this once so it may not be worth chasing. The bolt that holds the disc that triggers the cam sensor came loose and the disc shifted some. There is a pin and it stayed on that but the disc was kocked(not a spelling mistake the correct spelling gets censored). I might also try switch CPS side for side if you have not.
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post #47 of 107 Old 20th December 2016, 02:51 PM Thread Starter
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I did have a look at the disc on the end of the camshaft, it wasn't loose but i didn't really checked if it had could moved
I've tried swaping the cps , code always stays on bank 1

What would happend if i connect the bank 1 vanos board plug to engine bank 2 vanos plug and vice versa?

The Exhaust cam bank 1 is always at 2-4 degress no matter how i rev it
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post #48 of 107 Old 20th December 2016, 06:22 PM
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That would indicate one of two things either the piston is no moving or maybe that there is something supplying volts to the CPS to make the DME think it is not moving. Like a short to positive rather than ground. If you search 68fb user name he posted some screens of the CPS reading which might give you an idea of what the volts output by the CPS at 2-4 degrees.

Maybe the DME is screwed, but before I went there I would want to see the piston move and I would jump the three cps wire from the DME to the cps to make sure it was not a partly broken wire or other short to positive.
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post #49 of 107 Old 20th December 2016, 07:08 PM Thread Starter
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Hmm ok ,
--

And when you say jump the three cps wires , what do you exactly mean?

I've measured the voltages from the cps plug , pin 1 is 12volts , pin 2 is 5 volts (i assume signal wire) and pin 3 is ground and i confirm that the ground is good



I tried switching the vanos connections , connected vanos board bank 1 harness to engine bank 2 harness , and some one the other side , i started it up and it ran horribly but both exhaust cams were both at 60 degress now , so that tells me that the vanos piston move and that the cps is reading

Last edited by vallibirgiss; 20th December 2016 at 07:27 PM.
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post #50 of 107 Old 21st December 2016, 01:31 AM
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That is bizarre result. It might also confirm that the wiring is correct and sound. Pin two should fluctuate depending on position, it is the signal IIRC it is 5v and 0v, on off as the teeth of the disk flash in front of it. Pin one should be alt voltage or at least the same as terminal 30 and yes the ground goes to grnd rather to grnd via the DME.
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