SSDieselSupply.com
SSDPro-Exhaust.com
Results 1 to 5 of 5

Thread: PMD Module, Module pad and Dielectric Grease

  1. #1
    Join Date
    Apr 2017
    Posts
    16

    Default PMD Module, Module pad and Dielectric Grease

    About a month ago I replaced the PMD module, it is remote located behind the bumper.
    When I installed the new unit I also replaced the pad that goes between it and the heat sink.
    I was reading in here about putting dielectric compound between the module and the heat sink and so that brought to mind a couple of other questions.
    After I remove the PMD to smear on the compound, Do I still install the pad ?
    If I do install the pad, do I also give the pad a good coating of the dielectric grease so that both sides would be in contact with the dielectric compound and also the heat sink ?
    I thought I would check with you guys before I pulled it off to give it the lube job.
    2000 Chevrolet K3500 crew cab and long box, auto trans
    Relocated PMD W no. 9 resistor, gauge tower, boost, Pyro and trans temp. enhanced shift controller.
    Home made aeroquip oil cooler hoses.
    Added on Glow Plug Relay with manual push button along with the factory GP controller.
    3-1/2" exhaust with 4" tip. Straight through, no muffler and not too loud at all.

  2. #2
    Join Date
    Feb 2007
    Location
    Baja California Sur Mexico
    Posts
    2,807

    Default

    My understanding is that the dielectric grease is used instead of the pad.
    Grant H.
    1995 6.5 turbo GMC K2500 extra cab 4x4 pickup, PMD under bumper, mechanical wastegate, 228,000 miles, rebuilt engine, 4.10 diff, 16 mpg
    1994 6.5 turbo GMC K2500 4x4 suburban "F" VIN #9 resistor, PMD in the bumper, mechanical waste gate, 226,000 miles, Positrac 3.73 diff, 17 mpg highway.
    1982 4x4 shortbed 6.2 Chev 260,000 miles untouched motor 17 MPG 4.27 diff. Best thing I ever owned, 21 years.

  3. #3
    Join Date
    Apr 2017
    Posts
    16

    Default

    Quote Originally Posted by grancito View Post
    My understanding is that the dielectric grease is used instead of the pad.
    Okay, thank you very much. That clears up some of the confusion in Mine head. LOL
    2000 Chevrolet K3500 crew cab and long box, auto trans
    Relocated PMD W no. 9 resistor, gauge tower, boost, Pyro and trans temp. enhanced shift controller.
    Home made aeroquip oil cooler hoses.
    Added on Glow Plug Relay with manual push button along with the factory GP controller.
    3-1/2" exhaust with 4" tip. Straight through, no muffler and not too loud at all.

  4. #4

    Default

    Actually, the dielectric grease is only to improve the connection on the harness itself. Nothing but the pad should be between the heatsync itself and the PMD. Just put the grease into the connection and plug in as normal but leave the pad.

  5. #5
    Join Date
    Apr 2017
    Posts
    16

    Default

    Quote Originally Posted by tommyl View Post
    Actually, the dielectric grease is only to improve the connection on the harness itself. Nothing but the pad should be between the heatsync itself and the PMD. Just put the grease into the connection and plug in as normal but leave the pad.
    Thank You very much Tommy.

    YUP, thats the way I did it.
    I did find out though that a module can partially fail.
    After I did the tune up and had it out on the road, every once in a while the engine would skip a beat and the cruise control would disengage.
    It was a bear to start on cooler mornings, rather it was plugged in or not. It would miss and die, start it up, it would sometimes die again, the third start it would be missing on several cylinder then all of a sudden pick up all cylinders and run as it should, and a huge choking cloud of smoke.
    A friend that had sold His 6.5 gave Me a brand new grey Stanadyne module and adapter harness, along with a no. 9 resistor to fit. I installed it.
    Now when I start the engine it hits on all eight immediately and there is very little smoke from the pipe.
    The failing Dorman has a lifetime warranty so I took it in for an exchange and now have it and the related components in the box, in the jokey box.
    Along with the Allen wrench for the Dorman and the Torx bit for to remove the Stanadyne, if that should ever become necessary.
    2000 Chevrolet K3500 crew cab and long box, auto trans
    Relocated PMD W no. 9 resistor, gauge tower, boost, Pyro and trans temp. enhanced shift controller.
    Home made aeroquip oil cooler hoses.
    Added on Glow Plug Relay with manual push button along with the factory GP controller.
    3-1/2" exhaust with 4" tip. Straight through, no muffler and not too loud at all.

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •