• Welcome to The Truck Stop! We see you haven't REGISTERED yet.

    Your truck knowledge is missing!
    • Registration is FREE , all we need is your birthday and email. (We don't share ANY data with ANYONE)
    • We have tons of knowledge here for your diesel truck!
    • Post your own topics and reply to existing threads to help others out!
    • NO ADS! The site is fully functional and ad free!
    CLICK HERE TO REGISTER!

    Problems registering? Click here to contact us!

    Already registered, but need a PASSWORD RESET? CLICK HERE TO RESET YOUR PASSWORD!

6.5L FSD Cooler 50.00 shipped

Husker6.5

135' diagonal 16:9HD, 25KW sound!
Messages
3,334
Reaction score
4,424
Location
Lincoln, NE
Just make sure to rotate the new FSD 90° to the direction the old one was mounted (as evidenced by the trace outline of heat compound on the underside of that sink) because it is much more thermally efficient if each transistor has its own, dedicated, set of cooling fins instead of sharing the same set side-by-side and leaving half of the cooling plate essentially unused. It also helps if you set the FSD a couple of inches back from the leading edge (closest to the source of the airstream) as far as heat dissipation goes. You will most likely have to drill and tap four new mounting holes to re-orientate the FSD, but that is fairly easy, just make sure the holes fall between the fins and not atop one. Oh, one other helpful hint. Completely clean any heat sink compound off of the sink and your FSD. Use Arctic Silver heatsink compound (the best stuff out there, used to be available at Radio Shack back in the day, can still find it on-line) smeared in a very thin layer on the back of the FSD and on the two transistors and in their wells so that it is even with the back of the FSD. This will maximize heat transfer from the FSD body and the transistors to the heatsink, as it's the two transistors that produce all the heat.
 
Last edited:

dbrannon79

I'm getting there!
Messages
757
Reaction score
1,096
Location
Seguin, TX
@Jaryd the heatsink looks to have room to mount a "hot" spare PMD on there! just get a dummy plug to use in it to keep dirt and moisture out. when one fails on the road you can just swap the plugs and keep on truck'n :)
 
Top