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Thread: Bolts for "Turbo Power 6.5" cover/ Cooler Size help

  1. #1
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    Default Bolts for "Turbo Power 6.5" cover/ Cooler Size help

    My 96 came with the PMD laying on the intake. (ran Fine)

    This cooler came in & I don't have the size of the cover bolts to mount the cooler.

    Question: Does any one know off hand the size of the bolts. These I found in my shop I only finger tightened.


    I can figure out the length, Guess I need a metric?

    Thanks,

    Low
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    96 1500 6.5 Silverado

    81 Malibu ~ 75 Vega Wagon

    Lecanto, Florida

  2. #2
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    That's the worse place you can locate the PMD/FSD. It's better off mounted to the IP. Either get it out of the engine compartment, or mount it back onto the pump. Get your money back for that "cooler".
    1985 Blazer 6.2
    2001 GMC 2500HD D/A
    dmaxmaverick@thedieselpage.com

  3. #3
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    oops...... out board on the fender well ok?
    96 1500 6.5 Silverado

    81 Malibu ~ 75 Vega Wagon

    Lecanto, Florida

  4. #4
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    Best place is behind the front bumper .

    Swing the cover plate down to access the lower area below the radiator.
    Great place behind the bumper with plenty of cool(Cooler) air moving

    Several companies offer extension cables to get you connected.

    The engine bay is the worst place as Maverick said...

    All bolts on the 6.5 are metric.
    (1) 1995 Suburban 2500 4x4
    (1) 1997 Astro
    (1) 2005 Suburban (Papa Smurf)
    THIS IS BOW TIE COUNTRY

  5. #5
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    Anywhere inside the engine compartment is bad. If you're trying to minimize heat exposure of the PMD, it must be outside the engine compartment, in a location exposed to free, fresh air. Inside the engine compartment allows the heat sink to work in both directions, soaking heat FROM the engine and radiator into the driver more often than it moves heat away. Mounted to the IP, at least it has circulating fuel to help with heat transfer. Good locations include behind the headlamp or bumper "nostril" holes.
    1985 Blazer 6.2
    2001 GMC 2500HD D/A
    dmaxmaverick@thedieselpage.com

  6. #6
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    Also, you need to update your email account here. Go to "Settings" at the top/right of any page you're logged into, then "Edit Email & Password" in the left pane. Your current email we have on file (@dadios.com) is bouncing from an address no longer valid. Without a valid email on file, you can't update your password or recover your account, and you won't receive notifications, such as when new replies to your threads arrive (the bounces I'm seeing now). It isn't required, but may prevent headaches in the future.
    1985 Blazer 6.2
    2001 GMC 2500HD D/A
    dmaxmaverick@thedieselpage.com

  7. #7
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    Yes, I'll update. Thanks for reminding me what I should already know........but it's been a few years since I've studied.
    96 1500 6.5 Silverado

    81 Malibu ~ 75 Vega Wagon

    Lecanto, Florida

  8. #8
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    I mounted my FSD Cooler in front of the driver's side battery, as suggested here:

    http://www.kennedydiesel.com/6265FSD.cfm

    Casey
    1995 K1500 Tahoe 2 door, 6.5LTD, 4L80E, NP241, 3.42's, 285/75R16 BFG K02's; 1997 506 block; Kennedy OPS harness, gauges, Quick Heat plugs, and TD-Max chip; Dtech FSD on FSD Cooler; vacuum pump deleted, HX35 turbo, Turbo Master, 3.5" Kennedy exhaust, F code intake; dual t/stats, HO water pump, Champion radiator; Racor fuel filter

  9. #9
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    That's how I did my 94. But if memory serves me my cooling fins faced the opening.
    "The Constitution is not an instrument for the government to restrain the people, it is an instrument for the people to restrain the government."
    -Patrick Henry


    A5150nut
    2006 K3500 D/A
    94 6.5 4x4 5spd Sold

  10. #10
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    Robyn,
    Is there a link to that mounting with a picture? ~ Thanks

    & the silly questions why they aren't affected by rain?
    Last edited by Low_Bridge; 03-24-2021 at 08:06.
    96 1500 6.5 Silverado

    81 Malibu ~ 75 Vega Wagon

    Lecanto, Florida

  11. #11
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    The PMD (or FSD -Fuel Solenoid Driver, since it's not located on the pump) circuitry is completely potted. Meaning, embedded in a potting compound, similar to semi-hard caulking. Some I've seen are potted in a very hard compound, like epoxy (neither method seem to affect performance or failure rates). The electrical connector is the weather-pak type, so it's also protected from the elements. Coating the connector and contacts with dielectric grease further protects the connection. Mounting behind the bumper protects it from most direct weather conditions and impacts, and what remains is insignificant. The key is to get it away from heat and to a location it can be effectively cooled through the heat sink.
    1985 Blazer 6.2
    2001 GMC 2500HD D/A
    dmaxmaverick@thedieselpage.com

  12. #12
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    Thanks ~ Yes there are some license plate bolts. I'll see if I can make use of them if she'll reach

    96 1500 6.5 Silverado

    81 Malibu ~ 75 Vega Wagon

    Lecanto, Florida

  13. #13
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    Test drove her she was fine:

    I know I'll catch grief for the "heat sink"

    Everything else look about right?



    1.jpg2.jpg3.jpg
    96 1500 6.5 Silverado

    81 Malibu ~ 75 Vega Wagon

    Lecanto, Florida

  14. #14
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    Nothing wrong with the cool little gold heat sink.

    Adding heat sink paste between the heat sink and the PMD won't hurt.

    The contact surface need to be FLAT....

    The heat sink paste can be had at computer stores.

    White goop in a tube.

    I have mounted the heat sinks in one of the bumper nostrils a few times.



    Carry on
    (1) 1995 Suburban 2500 4x4
    (1) 1997 Astro
    (1) 2005 Suburban (Papa Smurf)
    THIS IS BOW TIE COUNTRY

  15. #15
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    Cool Robyn ~ Thanks.

    Like I said, the FSD was literally laying on intake when I got the truck. It came with a later gen FSD also.

    The guy was beat up from paying a local repair shop. New Pump & bigger turbo yadda.........

    I'll get some white dielectric grease when I get a chance.

    I believe I need to correct another thing also. I used a paper based gasket in between the FSD & the heatsink ~ will just potentially hold moisture & need change to rubber gasket?

    Thanks
    96 1500 6.5 Silverado

    81 Malibu ~ 75 Vega Wagon

    Lecanto, Florida

  16. #16
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    You don't need a gasket. You want to conduct heat away from the FSD. The factory used a special heat conducting gasket, but that was its only purpose. Use the best heat sink grease you can find and no gasket.
    The Constitution needs to be re-read, not re-written!

    If you can't handle Dr. Seuss, how will you handle real life?

    Current oil burners: MB GLK250 BlueTEC, John Deere X758
    New ride: MB GLS450 - most stately
    Gone but not forgotten: '87 F350 7.3, '93 C2500 6.5, '95 K2500 6.5, '06 K2500HD 6.6, '90 MB 350SDL, Kubota 7510

  17. #17
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    Cool That ~ Thanks John.
    96 1500 6.5 Silverado

    81 Malibu ~ 75 Vega Wagon

    Lecanto, Florida

  18. #18
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    Quote Originally Posted by Low_Bridge View Post
    Cool That
    Exactly!
    The Constitution needs to be re-read, not re-written!

    If you can't handle Dr. Seuss, how will you handle real life?

    Current oil burners: MB GLK250 BlueTEC, John Deere X758
    New ride: MB GLS450 - most stately
    Gone but not forgotten: '87 F350 7.3, '93 C2500 6.5, '95 K2500 6.5, '06 K2500HD 6.6, '90 MB 350SDL, Kubota 7510

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