N54 Setting engine timing Issue- Vanos moves

#1
Timing issue. Need help.
Set the timing on my N54 with the timing tool, following aldata procedure and this DYI for reference (https://www.e90post.com/forums/showthread.php?t=1080990)

After all is done, as soon as I rotate the engine clockwise, I can see the vanos move in relation to the cam. and after 2 revs the alignments are out. The vanos have been out for a while, prob have no oil. Are they spring loaded or just oil ? How can I tell if it is bad? Any suggestions
 

Aaron

Lieutenant
Nov 3, 2016
506
Colorado
#2
I actually just timed mine today.

You did torque down the cam bolt right? It's like 20nm +180 degrees, and by fucking God it's tight.

I believe you mean the phasers/sprockets are moving. Your tool set includes the tool that bolts on the very front of the head and uses the pins to hold the sensor dials in place correct?

The phasers are not keyed to the sensor dials or the cams, but they also shouldn't move any when the engine is rotated.

Remember, you need to spin the motor over twice, so with your 22mm wrench on the crank bolt, go a full 720 degrees.
 

powerfool

New Member
Jan 8, 2019
1
Chambersburg, PA
#3
I just did mine about 2 weeks ago for ledges and updated teflon rings. Didn't need them but that's another story...

Are you saying you're able to move the cam gears back and forth in relation to the cams or that you noticed they moved like possibly slipped the end of the cam in one direction?

The VANOS sprockets and phasers shouldn't move in relation to the cams without oil pressure and solenoids and all operating, in other words with the engine running. BUT - only rotate the engine by the crank and only clockwise as facing the front of the engine. Backwards with the chain on and you may screw up the chain tension and position of the VANOS mechanisms and tensioners which may be what threw you off.

Given the amount of things that could go wrong if those cam gear bolts don't hold there's no way in hell I'd re-use them and actually run it that way. I wouldn't try to guess the torque on them either - as Aaron noted they get torqued to the extreme.
 

Erichale77

Lieutenant
Nov 14, 2016
738
Clearwater, FL
#5
I learned the hard way about reusing cam bolts. I had my exhaust side cam bolt snap and take out my valves, rockers, lifters and damaged a few pistons and both cam shafts.
 
Sep 3, 2018
34
#6
I learned the hard way about reusing cam bolts. I had my exhaust side cam bolt snap and take out my valves, rockers, lifters and damaged a few pistons and both cam shafts.
I too learned this lesson a couple weeks ago. Wasn't as bad as yours thank God.
 

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