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painting the inside of the tractor

P

Patrick McCready

New User
Hello, I'm restoring an unstyled John Deere B and was wondering if it is necessary to paint the insides of the engine, transmission, and rear end housing? It looks like it originally had been painted and I have seen pictures of restorations where guys have painted them. And if it needs painted what kind of paint should be used? Thanks
 
Most of those castings were painted a buff primer at the foundry to prevent rust while stock-piled waiting assembly. Saved having to blast flash-rusted parts before paint. No other reason I could see to paint the inside. If it flakes off , which you will not know until it plugs up your pump or filters , you will regret it.
 
I always thought they painted the inside to the oil does not seep through the porous cast iron. Just my thoughts.
 
When I repainted my 8 year old riding mower a few months ago, I removed all the sheet metal and painted all in red oxide primer, then painted the side that shows the colors I prefer. The other side is still red oxide, can"t see it and it will help keep the rust away.
You say your "restoring", but you didn"t say if you plan to use the tractor or show the tractor. A pristine restoration will have the inside painted. A use it now and then and drive it in a parade some probably won"t have the inside painted. It"s your tractor and your decision so do what you wish like I did when I changed my mower into a wanna be Ford!
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Yes the block was painted to keep the fines from the castings from flaking off. Ask that question on the JD board
 
I bought a stack of engines one time and they had painted the inside of one block with high gloss paint. The theory was that oil sheeted off easier and it would not get sludge deposits in odd spots. It was suppose to be for a high performance engine.

I have never used it as I was afraid it would cause problems with the block breathing and heat transfer. These were air cooled vw engines so they run a lot hotter. I was also afraid it would peel and plug up something. It was not your run of he mill paint but still made me uneasy.

I would clean it good, rebuild it right, and paint the outside. Leave the inside alone.
 

Check out a paint called Glyptal it used to be made by GE and was used to paint the porous castings on the inside of engines , motor windings and many other applications.

Google Glyptal I know you can still buy it from several different sources.
 
The Glyptal is the right product for this application, it was used for the reasons mentioned in the other posts AND to inhibit corrosion (rust)after assembly in applications that see seasonal use or might not get the inside of the gearbox coated entirely while running
 
You dont know cast iron.In years past iron castings were put out in the weather to stabilize before any machining was done.A porous spot was a flaw that had to be repaired.
 
Used to build Mopar racing engines and used rustoleum 238 red oxide. Painted the valley heads and all the nooks and cranies in the block. It retains grit that not always is removed in washing and also helps in oil drainback.
 
It is a tough job to get the inside of a casting free of sand left over from the casting process when using sand for the mold. So the casting is dipped or sprayed with primer to trap any stray particles of sand and keep it from bearings.
 
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