Is Glyptal Engine Paint Worth the Bother

Hey, K9Racer;
Now I gotta know; Stude mill or not?
Baking it, why? To set the paint or to carbonize all the old **** in it? Probably need the self-clean cycle. Hope that doesn't warp something.
& since it's not a good idea to paint the inside of the cooling system, as that'll retain heat, why or what part of the mill was leaking coolant? Can't tell what is part of the leg-pulling here? Just curious...
Marcus...

 

Glypal was originally developed for G E to coat the insides and winding s of large elelctric motors , engine guys discovered that they could paint the insides of engines to help oil return to the pan and it helped seal the cases on old motorcycles , as the early aluminum castings tended to be porous and would drool beads of oil right through the cases , why you would need to paint a modern engine i wouldnt know , problem with doing this also if the preperation isnt perfect you now have dry flakes of glytal in your oil and pick up screen ,

 

I have used Glyptal in many builds . Never one issue , clean , clean surface prep is of a must . I used heat lamps to cure my stuff . I rebuild a trans I did 20 years ago last fall . Once I cleaned it , the coating looked as it was installed . I used correct thinner also , I like to use what is recommended by the product manufacture . All is well for me and I would do it over again in a minute .


Sent from my iPhone using H.A.M.B.

 

Glyptal was used by H.D as late as the mid 70s inside engine cases .Its function was to help seal minor pores in the casting.I always cleaned the case thoroughly then washed it with lacquer thinner and warmed the casting to around 120 or so farenheit before coating. I have never had any come off. I dont use it in automotive engines.

 

Anyone have part of a can they want to get rid of?

 

Agree. Chance of the paint flaking are not worth it to me. I prepped my first 2 blocks with smooth ground oil galleys, built a whole lot more since. I wont be doin it again.

It is worth the time to me to go over the entire block and deburr, remove casting flash etc. Cutting my hands up installing a fresh engine is just annoying when I coulda spent an hour cleaning it up.

I also like adding screens to the drainback holes, if youre not using roller rockers or anything with needles bearings its less of an issue.

 

WATERGL*** I've got a full can of that, never knew it could be used to coat the inside of an engine. Check the cl***ifieds later today. Bob

 

Glyptal on your flathead is a waste of money.
Just use a high quality oil and perform regular oil changes.
Spend your money on something that will make a difference.

 

One ultimately important question I've always had: would not a coating on the inside of the crankcase interfere with oil cooling?
The coating would tend to coagulate and fill in the valleys in the casting, thus decreasing the surface area available for heat absorption and radiation.
Plus, by the very intent of the coating (speeding oil return), the speeded-up oil would have less time on the casting's surface to transfer heat.
Eddie

 

don't use it, and never have, figure I could spend my time on better things for HP.............

 

This is an old thread and this is my first post here, having ended up on the forum after a google search for glyptal. Brian Block who has a YouTube presence mentioned it whilst discussing a ***mins engine rebuild. Incidentally he used another product from John Dear in his engine and he did paint the water p***ages in a wet sleeve engine, in fact he painted everything except precision surfaces. I was going to say that I once worked in the mining industry, and at the time Caterpillar painted the inside of their engines. In fact one Cat engine had to be rebuilt after a crankshaft failure, and they must have hot tanked the block and taken the paint off the interior of the engine. The engine was rebuilt, and returned to service, but some time later Caterpillar came back and said that warranty would be denied if the engine was not stripped down and the interior repainted again. That was done and I heard that the paint was very expensive, but as far as I remember I never heard the actual price. The actual cost would have been considerable when you consider the cost of an engine swap, the stripping, painting and rebuilding together with the cost of the downtime involved, but that is what happened in the mid 1980s.