Not that hot?

BIGSHCLUNK · May 10, 2025, 11:58:41 AM

I've always carried a spare resistor and ecu. How does the back melt just sitting in the trunk?

Bullitt- · May 10, 2025, 12:22:26 PM

I've seen this question several times & it happened to my ECU as well.
It seems the material just isn't that stable & over time just disintegrates.

JH27N0B · May 10, 2025, 12:47:07 PM

Me too, mine start to melt and ooze down the firewall!
Very irritating....
I brought the subject up some years back and was told someone came up with a method or material to restore them. That material is there to protect the circuitry from the elements, so you just need to find some sort of reliable epoxy that is inert, to fill it back up and seal it.
I had a spare ECU in my first aid kit I carry in my trunk. I pulled it out one day and found tools and such from the pouch were stuck in it, as the material softened up and went bad just sitting in the trunk for years!

dodj · May 10, 2025, 06:23:24 PM

Yup.....what Bullitt said...that rubbery epoxy they used just wasn't that stable in the long run.

BIGSHCLUNK · May 10, 2025, 09:12:57 PM

Well at least it's not just me. I should have taken a pic of the mess it made. I dont think the circuitry was damaged but??? Think I could epoxy over it? Or would that do something to heat dissipation if I ever needed to use it?

blown motor · May 10, 2025, 09:35:07 PM

I had the same thing happen with mine. Lost most of the gunk but it kept on working just fine.

Bullitt- · May 11, 2025, 02:32:13 AM

Quote from: BIGSHCLUNK on May 10, 2025, 09:12:57 PMWell at least it's not just me. I should have taken a pic of the mess it made. I dont think the circuitry was damaged but??? Think I could epoxy over it? Or would that do something to heat dissipation if I ever needed to use it?

I'm thinking just sealing in what's left might do the trick, maybe something along the line of Flex Seal paste.....

dodj · May 11, 2025, 03:59:56 AM

You might be able to seal it. That stuff was for water and vibration. It's probably still doing it's job...but it may continue making a mess for you.

Jay Bee · May 11, 2025, 05:20:35 AM

Quote from: BIGSHCLUNK on May 10, 2025, 09:12:57 PMThink I could epoxy over it? Or would that do something to heat dissipation if I ever needed to use it?

I often thought of doing that too but wondered the same thing as well.