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ICM placement

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Old May 27, 2018 | 05:46 PM
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ICM placement

Reading about ICM sez to coat back side in dielectric grease, so presumably heat sink isn’t grounded to fender well…

I’m looking to have mine in-cab behind dash in my ‘52. Any reason I can’t mount to firewall (which has insulation fabric)?

Thanks
 
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Old May 27, 2018 | 05:47 PM
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Old May 27, 2018 | 06:43 PM
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DiElectric, or heatsink compound?
 
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Old May 27, 2018 | 07:24 PM
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White thermal paste.
 
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Old May 27, 2018 | 07:35 PM
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The paste goes between the TFI module and the heat sink.
Sure you can mount the module in cab, good place for it
 
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Old May 27, 2018 | 07:46 PM
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Do not use dielectric grease.. it's an insulator and defeats the whole purpose of putting the module in a heatsink, use thermal paste Yes.. I know dielectric grease is what many of the parts houses say to use and often what they provide, this is just another example of how they got it all wrong.. like when they say a Black TFI replaces a Grey module.
 
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Old May 27, 2018 | 10:45 PM
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Ahh, yes, thank you… didn't catch that distinction before, as when I pulled this one from a junkyard it looked like there was 'something' (maybe?) on the backside of the sink where it attached to the fender well.

Originally Posted by Briansshop
The paste goes between the TFI module and the heat sink.
Sure you can mount the module in cab, good place for it
 
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Old May 27, 2018 | 10:47 PM
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I'm assuming since I didn't remove the module from the sink I can just leave it "as is"?
I'm using the AllDataDIY site, which is where I saw the reference to dielectric grease:

"Use Silicone Dielectric Compound WA-10 D7AZ-19A331-A (ESE-M1C171-A) or equivalent."

Originally Posted by Conanski
Do not use dielectric grease.. it's an insulator and defeats the whole purpose of putting the module in a heatsink, use thermal paste Yes.. I know dielectric grease is what many of the parts houses say to use and often what they provide, this is just another example of how they got it all wrong.. like when they say a Black TFI replaces a Grey module.
 
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Old May 27, 2018 | 11:01 PM
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Yes,as is and just mount it.
 
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Old May 28, 2018 | 09:02 AM
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I do not see any sign of the White thermal paste in your photo.
So I would remove the ICM from the heat sink and reapply the White thermal paste.

See AllDataDIY site is not always right. Check here first.
 
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Old May 28, 2018 | 10:51 AM
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Do you have a build thread?

Looks like you've made a lot of progress.
 
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Old May 29, 2018 | 11:45 AM
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I pulled the entire ICM assembly (w/ sink) from junkyard, so presumably it should be good to go from the factory, no?

Originally Posted by subford
I do not see any sign of the White thermal paste in your photo.
So I would remove the ICM from the heat sink and reapply the White thermal paste.

See AllDataDIY site is not always right. Check here first.
 
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Old May 29, 2018 | 11:51 AM
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Originally Posted by Scndsin
Do you have a build thread?

Looks like you've made a lot of progress.
Thanks, no active thread currently. I started one but then realized I'd prefer to wait until the project is complete and then write-up the process from start to finish. Seemed otherwise thread would wander or get hijacked along the way...

Looking to have it on the road this summer or early fall. The wiring has been the most complicated part (though I recognize your ID as someone who has helped along the way!). I started with a massive box of wiring pulled from the donor '95 and had to go thru and cull only what I needed (or thought I needed). Yes, it would've been waaay easier to just buy an aftermarket harness, but this is a low-budget build and so I used what I had. Now the hard part (continued) is placing installing all of that wiring in the '52.

I will say it should be pretty sweet when I'm done. ;-)

Stay tuned!
 
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Old May 29, 2018 | 12:50 PM
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Well, I take more blame than that. Pretty sure I suggested it (to you) somewhere along the way.

Really like to see you succeed, would like to do it on an old Mustang with a 460/E4/8.8 donor.

Keep us posted.
 
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Old Jun 2, 2018 | 06:48 AM
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Here's a related post on the use of heatsink vs. silicone dielectric. Says too much compound is worse than none at all.

https://www.w8ji.com/distributor_stabbing.htm
 
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