oil pan and baffle

T

tallcoil

Member
I am having the pleasure to reassemble my rebuilt short block.

The oil pan and interior baffle have been cleaned with industrial soap down to the bare metal. Should the inside of the oil pan and baffle be given a light coat of paint, zinc chromate, or left as bare metal?

I could not find any answers in the archive or in the Schild or Andrews books.
thanks
Don
 
I paint both my dipper tray and pan on the inside and outside. I used DP90 primer, then DCC9000 black.
You mentioned zinc chromate and that should work well also.
 
Over at "Yesterday's Tractors" a few years ago, They would paint the inside of the block (not the tin) with a special paint ( I have CRS and can't remember what it was) to seal the block. Cast iron is porous and some engines would sweat oil through the iron. The stuff they used was red IIRC. Did they "do" anything? I don't know!
Terry
 
I was talking to Dusty , and he should me a picture of the inside of his block and it was painted red. don't know what kind of paint it was.
 
What did the factory do?

Was the outside of the oil pan dipped, brushed or sprayed with black enamel? Or lacquer?

Why are we working on Model A's and not Model U's?
 
It was a trend for a while BUT you only need 1 small piece to flake off and block a oil gallery to kill a engine
 
The inside of the engine went for over 80 years with out paint. Paint will do more harm than good. I have never seen the inside of a engine painted at the factory. Must be a good reason.
 
JMO: Unless you are able to obtain an absolutely oil free surface ...don't risk painting it. If even a small portion peels you risk destroying your main bearings by obstruction your oil delivery tubes. I've seen it happen with an engine that overheated.
Good Day!
 
thanks guys, the consensus is keep the inside of the pan naked as the day it was stamped.

another neophyte question: I am preparing the oil pan for bead blasting. Under the outside lip, where the bolts go through, there is a reinforcing strip of steel running around the pan. Mine is separated a bit from the front side of the pan. Can this be removed or is it spot welded in place? I would like to remove it to get to any rust behind it and the pan.

Hope I am not annoying anyone with my picky questions.
thanks
Don
 
tallcoil said:
thanks guys, the consensus is keep the inside of the pan naked as the day it was stamped.

another neophyte question: I am preparing the oil pan for bead blasting. Under the outside lip, where the bolts go through, there is a reinforcing strip of steel running around the pan. Mine is separated a bit from the front side of the pan. Can this be removed or is it spot welded in place? I would like to remove it to get to any rust behind it and the pan.

Hope I am not annoying anyone with my picky questions.
thanks
Don
Click to expand...

It's spot welded. Leave it in place and be sure to wash all the sand away before painting.
 
I tap the reinforcing with a small hammer while blowing all around it with compressed air to remove the blasting media.

Have you seen holes in oil pans and dipper trays caused by water and acids in the oil? I'll continue to paint mine inside and out until I destroy an engine with a paint flake.:D
 
I have seen engine blocks interiors painted with Rust Oleum because it is a fish oil base paint. I have also seen Glyptol(not sure of the spelling) which is an electrical sealant and holds up well. It is used for sealing field coils and Ford T magnet coils. The better machinery such as gear boxes and oil galleries used on lathes, horizontal mills, and drill presses are painted with a fish oil base paint to keep the oil clean and seal the interior of those castings. Cast iron can be a dirty metal which releases a powdery black dust.
 
no need to paint inside of pan or engine, those things live in oil, either splashed or misted, and oil does not eat holes in any metal, water is the cause if a hole is present, modern oils have rust inhibtors, i would be more concerned about the alignment of spray bars for the oil dippers on the rods, if you must paint some thing paint the tires with tire black, looks cool
 
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