Senior Tech Team
Join Date: Apr 2012
Location: Yerington, Nevada
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.