Engine bay bulk head sealant? - Chevelle Tech
Electrical & Wiring Troubleshooting electrical problems.

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post #1 of 7 (permalink) Old Jun 10th, 19, 10:04 AM Thread Starter
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Brian
 
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Engine bay bulk head sealant?

Just got done cleaning out the factory goo on the engine bay bulkhead where I needed to add tach and amp meter connections. What do you use to water proof seal the area when done?

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post #2 of 7 (permalink) Old Jun 10th, 19, 10:50 PM Thread Starter
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Hmmm. This says silicone sealant.

https://www.americanautowire.com/PDF...20IN%202.0.pdf

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post #3 of 7 (permalink) Old Jun 10th, 19, 10:58 PM
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Re: Engine bay bulk head sealant?

I would use Di-electric grease. Terry
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post #4 of 7 (permalink) Old Jun 11th, 19, 12:23 AM
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Re: Engine bay bulk head sealant?

Sealant on the exterior and dielectic on the mating section inside.

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post #5 of 7 (permalink) Old Jun 11th, 19, 2:43 PM
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Re: Engine bay bulk head sealant?

The factory "grease" was there to do two things, deter the formation of corrosion in the contacts, and stop moisture from getting to them in the first place. It was never intended to help electrical transfer in the terminals. Problem is, after decades of heat, cold, chemical attack, pressure washing, adverse conditions, it gets worn out, and needs to be replaced. It was never meant to last 50 years, only about 20 or so. I have never seen a bulkhead connector to fuse box sealed off with silicone seal, fuse box to firewall, a few.
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post #6 of 7 (permalink) Old Jun 18th, 19, 12:55 AM
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I just went through this on my car. I removed and added wires at the bulkhead. I used 3m black weather stripe adhesive around the wires. It flows well and self levels.
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post #7 of 7 (permalink) Old Jun 18th, 19, 5:37 PM
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Wink Re: Engine bay bulk head sealant?

Black 3M Strip Caulk. Don't use silicone, it will cause terminal corrosion.
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