Can Anti-Sieze Compound Bugger A CPS??

[Dave M]

Been having some cold start / warm up / ignition crapping out issues (http://www.bimmer.info/forum/showthread.php?t=21258) recently.

This morning I was poking around and found some anti-sieze compound on the end of the crank position sensor (from the rebuild). I pulled the CPS, cleaned it up and replaced. The temp was 10 degrees C. and the engine ran fine. No shut-downs, no CEL illumination.

Could the anti-sieze have caused the hesitation/ignition shut down symtoms I was experiencing? I guess I'll know better when I start it and warm it up on a colder morning.

Somewhat Aside: Is anti-sieze composed of metal?

Sharing my thoughts,

Dave M

[632 Regal]

most of them do! Bet you found the culprit.

[ryan roopnarine]

Been having some cold start / warm up / ignition crapping out issues (http://www.bimmer.info/forum/showthread.php?t=21258) recently.

This morning I was poking around and found some anti-sieze compound on the end of the crank position sensor (from the rebuild). I pulled the CPS, cleaned it up and replaced. The temp was 10 degrees C. and the engine ran fine. No shut-downs, no CEL illumination.

Could the anti-sieze have caused the hesitation/ignition shut down symtoms I was experiencing? I guess I'll know better when I start it and warm it up on a colder morning.

Somewhat Aside: Is anti-sieze composed of metal?

Sharing my thoughts,

Dave M


unless you buy one that says "non-metallic", it probably has metal in it. whether or not that has enough metal in it to foul up the operation of the CPS depends on the brand of the stuff. most of em seem to have molybdenum or lithium or graphite, ie, nonpolar substances you wouldn't "think" of causing stuff like that to happen. you may have found your problem, though.

[Dave M]

The bottle doesn't state metalic or non-metalic. I'll do some research and try to find out. Either way, I'll let everyone know if this was the prob.

Thanks,

Dave M

[pingu]

I think that any anti-seize compound on the Crank Position Sensor (CPS) is coincidence.

I'm pretty sure that the CPS is an inductive sensor (i.e. it magnetically detects the notches in the steel crank wheel).

All the anti-seize I've ever used looked like it contained particles of copper, which seems to be confirmed by the following link:
http://www.jameswalker.biz/jwco/products/copper_anti-seize_compound.html

Copper isn't magnetic and so the anti-seize shouldn't impair the operation of the CPS.