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Thread: Can Anti-Sieze Compound Bugger A CPS??

  1. #1
    Join Date
    Jan 2004
    Location
    Thunder Bay, Ontario
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    2,538

    Default Can Anti-Sieze Compound Bugger A CPS??

    Been having some cold start / warm up / ignition crapping out issues 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

    10/90 Build 525im, 630,000+km, Eibach/Sachs, Engine Rebuild
    *RIP Oskar the DOG *

  2. #2
    Join Date
    Dec 2003
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    Eastern Tennessee USi
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    14,839

    Default

    most of them do! Bet you found the culprit.
    95 E34 530I V2.37
    ===========
    Those who make peaceful revolution impossible will make violent revolution inevitable.

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  3. #3
    Join Date
    Jan 2004
    Location
    Benneton (United Colors of)
    Posts
    3,067

    Default

    Quote Originally Posted by Dave M
    Been having some cold start / warm up / ignition crapping out issues 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.
    "..Torchinski v. Peterson that it is legal to carry a concealed weapon, so long the weapon is totally slick like a huge ass machine gun that you carry under a trench coat, like in the Matrix."


  4. #4
    Join Date
    Jan 2004
    Location
    Thunder Bay, Ontario
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    2,538

    Default

    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

    10/90 Build 525im, 630,000+km, Eibach/Sachs, Engine Rebuild
    *RIP Oskar the DOG *

  5. #5
    Join Date
    Mar 2006
    Location
    Great Britain
    Posts
    446

    Default

    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/prod..._compound.html

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

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