Do I need to repaint the interior of the engine

[Stewart]

After having my block boiled all the paint that was visable in the oil pan area and infront of the rear plate is now gone. Should I leave this as bare metal or does it need to be repainted.

 

[Hap Waldrop]

I would just leave it bare, some blocks paited by the factory inside with Gylptal. I've done this to engines in the past, infact just did one. Gylptal is expensive, like $40 and can and you have to do alot of masking to keep the coating off machined area of the engine, so it's alot of work, don't attempt to use anything excpet Gylptal. Hope this helps.

Here's a photo of a customer engine I recently Gylptal painted, it was orginally done this way from the factory, since it was a very high end S/C purpose perfoamcne built engine with no expense spared, I went for it.

 

[vping]

How do you get the unpainted parts so clean and shiney?

 

[Stewart]

I will leave it as is. It was wierd as this block the internal portions were silver while my other one was just like your picture and it was unharmed by the hot tanking.

 

[Hap Waldrop]

How do you get the unpainted parts so clean and shiney?

I wire brush the pan rails and oil pump perch, and just use a little scotchbrite to clean up the main saddles. I also have a flez hone to hone the lifter bores to make sure they are nice and smooth.

Stewart, Glyptal is tough stuff, it holds up very well to cuastic washing. The main reason it is used is to seal the pores of cast iron from gunk and crud, and keep with oil drain back.