Forum Discussion

filadelfia's avatar
filadelfia
Explorer
Dec 16, 2013

Exhaust Brake Lubricant

Hi, I need some help deciding if WD-40 silicone lubricant would be good for lubing the exhaust brake on a Cummins diesel. This is not the regular WD-40 it is a silicone lubricant that is rated at - 100 deg. to + 500 deg. f It is called WD-40 specialist water resistant silicone lubricant.

Thanks for your help Don
Class A
  • gswcgi's avatar
    gswcgi
    Explorer
    Dec 17, 2013
    Bee using Pac Brake juice for 11 years, the only way to go!
  • Sully2's avatar
    Sully2
    Explorer
    Dec 17, 2013
    And another Pac Juice voter. Its not $$ and you only use a little each time. Goes a long ways
  • wolfe10's avatar
    wolfe10
    Explorer
    Dec 16, 2013
    The reason everyone is saying the same thing is that the exhaust brake lives in a really terrible environment, with temperatures approaching 1000 degrees F, soot, etc.

    The wrong lube could coke and actually cause the butterfly to seize.
  • Executive45's avatar
    Executive45
    Explorer III
    Dec 16, 2013
    Use the proper lube..WD40 isn't a lubricant, it's a water displacement. Get it from PacBrake....Dennis
  • FIRE_UP's avatar
    FIRE_UP
    Explorer
    Dec 16, 2013
    Yep,
    I second, third and forth recommend Chris's recommendation.
    Scott

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