Oil Pan Internal Oil-Resistant Paint

[Barn Junk]

Have a flathead steel oil pan that had a good amount of rust inside and outside. Sand blasted it clean but want to coat the inside for future protection and ease of cleanup. Want something that is not going to come off and plug up the motor. Also nothing real expensive or exotic like requiring baking, etc. Just something that can be easily found and locally purchased. Brush or spray can. What good products have you found and used? or bad experiences?

[hotcoupe]

jmho, oil pans are not that expensive. i wouldn`t trust any topical coating on the inside of an oil pan. it sounded like you were looking for opinions - that`s mine.
tom

[Jack E/NJ]

Your motor oil should slosh around and protect the bare metal as-is. I wouldn't recommend internally coating it with anything other than motor oil.

Jack E/NJ

[51 MERC-CT]

Glyptal is the only thing I have ever used or seen used on internal engine parts. (never on the oil pan )
If I absolutley had to I would Black oxide (gun blue) treat the inside of the pan.

[Old Henry]

Don't think the inside of the oil pan needs anything to prevent rust since it's always coated with oil. I think the risk of any coating coming loose and plugging up oil passages is greater than any risk that the inside of the oil pan would rust.

My 2 cents.

[Newc]

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Hi all; I have used the electric motor expoxy on just these oil pans after sand blasting and repairs/mods. It is very toxic to breath though, be careful. That would be the red Glyptal. Newc

[Barn Junk]

Good comments. Had a bunch of pans blasted to see what I got so my main concern is to protect the new surfaces until future use. Don't want them to rust or haft to strip off paint. Guess I could spray on a coat of heavy oil and wash it off in the future before assembly.

[peteyshoes]

if you are just storing these-- you might want to consider using pam cooking spray or crisco grease. might sound far fetched, but, it works!

[Karl Wolf]

I read, and saw pictures about the potential for a sandblasted oil pan to retain sand under riveted attachments- inside the engine...
Karl

[Ronnie]

Originally Posted by Karl Wolf

I read, and saw pictures about the potential for a sandblasted oil pan to retain sand under riveted attachments- inside the engine...
Karl

Yup disaster will happen

R

[Henry/Kokomo]

Barn Junk - Gibbs makes an aerosol spray - sorta like WD40 - that is a pretty effective rust preventative. Sold under the name Gibbs Brand. They have a website and can be googled, I think.

[gmc1941]

Call me stupid (she said it always) but why would you want to coat the oil pan and have the possibility of flaking material floating around. As long as you change you oil on a regular bases, which will remove any non-oil products. Also how are you going too ensure that the coat is going to stick on a surface that has been coated with very hot oil for years? I guess you'll have to bake it or hours, and it really stinks. Waste of time. Gordon

[BUBBAS IGNITION]

Interesting thread, funny how opinionated we can become over the years.

I have used the GE Glyptal 1201 ( available thru Eastwood for $49.95 per qt) for many years on the inside surfaces of engines , rear ends, steering boxes and transmissions.
With no flaking what so ever. This stuff was designed to be used inside electric motors on a rebuild.
The thing i like about this coating is it makes the surfaces slick and oil will transfer much better with it on the surface. Wont allow rust and in the case of some sand -glass bead etc, it actually seems to seal the particles in place.
Also if the need ever arises for tear down the surface is cleaned up very easily as well. Not that we ever take something apart more than once

[Walt Dupont--Me.]

I worked in automachine shop for 50yr's. I've seen alot of industrial engine painted on the inside, International, Studabaker, and others. It was a red stuff like the electric motors. Walt

[quickchange34]

Like Bubba said, glyptal is the only way to go. It works and wont come off.

[Barn Junk]

Bubba, Walt and quickchange, What you guys say makes the most sense and seems the best solution for "MY" situation. Thanks for responding in a positive way with your practical experiences.

And Henry/Kokomo that spray could be simple way of preserving surfaces that have been highly cleaned for inspection, like gears, that you don't want to paint, but need rust protection for storage. And probably not as messy as grease. I'm going to try it. thanks

[Henry/Kokomo]

BJ - Gibbs worked for me. No rust and not messy. That said, Glyptal is great stuff. Used it for years on the interior of large diesel engines and generators.

[DavidG]

'32 aluminum oil pans are porous and literally sweat oil; Glyptal is the cure.

[franksford]

Glyptal is excelant, also Rustolum works great. I've used it for years. After glass bead blasting it's a good idea because if any glass got lodged it the pan it will help seal it in place. The reason for sealing (painting) the inside of a engine is to aid in oil returning to the sump faster and reduce sludge build up, better cooling. Most large marine engines are coated for this reason.

If the whole inside of the block is not treated this way the job is inly half done. I've been doing this for years on all engines i rebuild, My background is large marine engines. This will only be sucussful if the engine is preped correctly. Paint only sticks to properly clean surface. When you think it's clean enough, clean it again. Frank