Hi, can I use dielectric silicone paste on the fuel pump electrical connectors inside the gas tank? I've seen some connectors melt and cause problems - I'd like to do that preventively. Thanks.
Yea, I wouldn't. In theory it should be ok. However, addressing the real problem is best, make sure connections are good, clean and strongly connected. This will take care of it.
yes you can. That's exactly what it's for. Oxidation/Corrosion can cause connectors to go high resistance and heat up/burn out.
@mountainmanjoe
The issue to me is, I don't silicone going through my engine, specifically the cats. I am a firm believer of a proper made electrical connection and installed to engineering specs. And if he's get corrosion inside his gas tank, he's got a evap leak and/or keeping very little fuel in the tank. I won't say it won't work and it is a small amount which likely won't do significant harm but given the chance to do it right over just putting silicone grease on it...
@hillbilly
He did not mention any fuel system problems. All he asked is if it can prevent problems, and the answer is yes it can.
@mountainmanjoe
He said it was INSIDE his gas tank and silicone is rated as unsatisfactory for gasoline.
https://mykin.com/rubber-chemical-resistance-chart-3.
And yea, it's great for preventing corrosion...so long as it's compatible with the environment.
You linked a page for rubber. The question is about silicone grease. In my experience silicone is inert, and is not soluble in most solvents.
@mountainmanjoe
Scroll down the silicone column to gasoline. Many items are in the list, not just rubber (petroleum products). And btw, it's not inert.
The title of the page is "Rubber Chemical Resistance". All the substances across the top of the table are types of rubber (eg silicone rubber). Silicone has a very low surface energy. It is very widely used substance because it is not attacked by so many solvents, acids, bases etc. It is extensively used in the food industry because it does react with humans.