379 hood isolators

Discussion in 'Peterbilt Forum' started by AB Slinger, Nov 12, 2012.

  1. AB Slinger

    AB Slinger Bobtail Member

    Messages:
    7
    Thanks Received:
    1
    Joined:
    Nov 19, 2011
    Location:
    Clarkston Wa
    The two rubber hood isolators at the top of the cowl ( about 2" x 2" at the top of the firewall )have a tendency to squeek a lot. I have tried WD40, grease, silicone spray, and every other lubricant. I have to spray these daily and even at that they will start to squeek by the end of the same day. Has any one else out there had this same problem, and what have you done to help the situation ?
     
  2. 379wheathauler

    379wheathauler Bobtail Member

    Messages:
    30
    Thanks Received:
    4
    Joined:
    Sep 5, 2011
    Location:
    Montana
    Mine did the same thing untill I was getting a tire repaired,and seen a bucket of murphys tire lube the thick greasy stuff. I put some on and it lasted for a month at least. I also twisted my bottom guides alittle bit more for a tighter fit.
     
  3. highside

    highside Medium Load Member

    Messages:
    442
    Thanks Received:
    502
    Joined:
    Feb 6, 2010
    Location:
    Kansas
    I know exactly what you're talking about! There are poly-urethane replacement bushings available. (Blue in color) They are the answer to your squeaking problem.
     
  4. Boardhauler

    Boardhauler Road Train Member

    Messages:
    1,189
    Thanks Received:
    768
    Joined:
    Dec 21, 2008
    Location:
    Ballin' in it for Shakey
    I've used the wax stick lubricant that I use on door latches. Heck, if it was a Freightliner you'd never hear it over all the door rattles.
     
  5. LandShark

    LandShark Road Train Member

    Messages:
    1,516
    Thanks Received:
    1,026
    Joined:
    Nov 22, 2008
    Location:
    Riverdale, Ga
    No problem on mine.
    Told the mechanic about it. So they just removed both rubber isolaters lol no more problems.
     
  6. farmer mike

    farmer mike Bobtail Member

    Messages:
    10
    Thanks Received:
    0
    Joined:
    Nov 26, 2012
    Try putting a sock over..
     
  7. Ezrider_48501

    Ezrider_48501 Road Train Member

    Messages:
    2,044
    Thanks Received:
    1,143
    Joined:
    Apr 2, 2011
    Location:
    bismarck, nd
    i just put a squirt or two of red tack grease from my grease gun on the hood isolators once every few weeks while i have my hood open for my pre trip. virtually non issue, when the squeak comes is just a reminder you need to pull your grease gun out and grease a few things on your truck. just think of it as a pm reminder. every pete i have ever drove has had this issue, but there is far less rattles and squeaks in petes as most other brands.
     
  8. Rat

    Rat Road Train Member

    Messages:
    1,503
    Thanks Received:
    1,377
    Joined:
    Aug 31, 2008
    Location:
    Rats nest Grafton North Dakota
    I just use grease. Only problem is when you decide to do a good window cleaning with Windex or something like that as I always tend to get grease on my jacket etc.
     
  9. Stuskw

    Stuskw Bobtail Member

    Messages:
    35
    Thanks Received:
    10
    Joined:
    Nov 9, 2011
    Location:
    BC Canada
    Get a pair of leather gloves and put them over the isolators just like putting your hand in them. Takes the wiggle/squeak out and it's clean. Works like a charm.
     
  10. The Admiral

    The Admiral Heavy Load Member

    Messages:
    734
    Thanks Received:
    394
    Joined:
    Jul 18, 2010
    Location:
    Akron,Ohio
    I always used white lithium grease. NAPA carries it in 1# tubs,kept it right in the truck. Usually dabbed some on at grease time or if I was waiting to load or unload ect. Clean off the extra once in awhile. No big deal. Put it on the other hood guides,makes the hood way easier to open. None of that standing on the bumper stuff,just grab the handhold and pull.