Paint inside assemblies

[JCKnife]

I've noticed the inside of various bodies and assemblies (steering knuckles, PTO, winch end assemblies, etc) seems to have the same reddish paint inside there. How important is it to repaint or touch that up? My assumption is that these bodies are generally filled with gear oil so not too important. But thought it worth asking.

 

[m16ty]

Just about every gear case I've been into has that red paint. I have no idea what kind it is.

I wouldn't worry about replacing it though. I'd worry whatever I painted in it's place wouldn't adhere good and end up in the bearings and such.

 

[ODdave]

Its a primer/sealer that is applied to the castings at the mill to protect them from rusting before they are sent to be finish machined. Not a big deal to replace but it is nice as it keeps rust from forming inside the parts. Not a necesity though.

 

[wdbtchr]

I believe it's a paint called Glyptal. You will also see it on electric motors and generators to help insulate and protect the windings.

We used to have it around to seal leaks on high vacuum systems, paint it with a brush where you hear the whistle of a leak. Dries fast and hard.

 

[quickfarms]

I was wondering that too

 

[466Navastar]

Glyptal 1201 Red Enamel Insulating Paint Quart : Recommended by many high performance engine rebuilding books, Glyptal seals the tiny pores left in metal after bead blasting and leaves the engine block interiors smooth. Helps keep the oil clean and flowing freely. Acid and oil resistant. Used on generator and alternator armatures, Glyptal has great electrical insulating properties, too!

We used it in the lifter galleries of racing engines to improve oil flow back to the oil pan - i imagine the military used it for same purpose and sealing castings.....can only be applied to castings that were chemically cleaned - or ends up in the sump.

 

[JCKnife]

Awesome info, thank you guys. I worried at first this was a dumb question but I learned something.

 

[salvorone@aol.com]

i thought that was primer , paint it green

 

[eagle4g63]

Now I know where I saw that stuff. A couple of years ago I remodeled a place that rebuilt electrical motors and what not.....they used that stuff by the barrel out there(rebuilt train motors). Like said to seal the inside of the castings....also making them electrical proof.

Thanks now I know where I am going to find some myself.

 

[jasonjc]

I've seen that stuff in Eastwoods catalog.

 

[Mike_L]

We used to paint a dark blue version of Glyptal on nicked and chaffed wires in our transmitters and receivers in the Air Force. Didn't know it could be used for mechanical insulation too.

 

[steelandcanvas]

Back in my fast car days, we also would paint the valleys of the heads to make the oil get to the pan quicker. We also painted the inside of the block up to the crank journals for the same reason. Neat stuff. Don't know if it helped that much, but it was fun to do while putting a race motor together. 466navastar and I must have run around with the same Guys.