What advantages are there to painting the inside of the block?

[gagembassett]

Gentlemen,

For those who have & still do paint their blocks with glyptal. I once heard someone say that they use a handheld propane torch & paint thinner. They wipe they paint thinner on & use a torch to cook off the oil, said they repeat that process about 7 or 8 times minimum before they paint the block to ensure it is good for best glyptal results.

What's everyone's thoughts?

 

[Demonracer]

I have the inside of my 408 coated with Glyptal. When I sent the block to the machine shop, my machinist suggested it. He baked the block to burn out the oil in the porousity of the block and I took it home to paint it before the machine was done. That was 15 years ago and it still looks good. I can't say how much it affects the oil drain back, but it may help with it.

 

[go-fish]

I have a virgin 5.9L block that is NOS from Mopar Performance. I thought about doing the Glyptal coating because the only oil the block has ever seen is for storage and corrosion resistance. Moreover, I was thinking about getting the block stress relieved in an oven. If my new machinist has the equipment I would get it stress relieved and paint glyptal.

@Demonracer actually answered a question that I had; Will baking a used block be enough heat to effectively make enough oil leach from the cast? Sounds like it. Off topic thought now is, would a virgin block NEED to even be stress relieved for a 5-700 horsepower engine build?.

Would Glyptal adhere just fine if I did the torch and paint thinner method? Can the outside of the block accept Glyptal?

 

[harrisonm]

Glyptal coating. when the block is clean and dry. Helps the block from retaining oil and any break in particles from sticking. Oil flows to the sump faster. Steve has customers that request it at the machine shop. Usually done before machine work . Block must be spotless and dry

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I totally agree with the fact that the inside of the block must be dry and clean. But how do you clean the inside of a block that has been soaking in oil for 50 years?