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Paint removal on machined gasket surfaces.

  • Thread starter Thread starter Ddyer2868
  • Start date Start date Feb 16, 2026
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Ddyer2868

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Nov 24, 2025
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Feb 16, 2026
#1
  • Feb 16, 2026
  • #1
So I think the new kid at machine shop kinda f'd me. I know I can't install gaskets on painted machined surfaces. I have an idea for paint removal (probably citrus based stripper, razor blades/plastic scrapers on timing cover especially). I'm guessing i should remove paint on the timing cover inside of where the water pump will mount also so it doesn't end up melting and getting into coolant/ oil. I know not to use scotchbrite/sandpaper or wheels. Just curious if anyone has any tips or ideas to limit clean up and getting contaminants into the engine?
 

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LILCBRA

I wish I didn't have all of these balls in the air
Mod Dude
Dec 6, 2005
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Corn County USA
Feb 17, 2026
#2
  • Feb 17, 2026
  • #2
I would probably start with Aircraft stripper if you're able to get it. And I wouldn't worry too much about the area behind the backing plate of the water pump. If you look, you'll see a drain slot at the bottom mounting surface, so any kind of fluid build up there will leak out and not into the water passages.
 

Realmongo

I prefer to be called "Evil Genius"
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Oct 10, 2001
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Western Mass
Feb 19, 2026
#3
  • Feb 19, 2026
  • #3
If it's just lacquer, you can soak a cloth with lacquer thinner, and it will dissolve it.
 

gkomo

now i can hopefully expect to receive the shaft
Aug 2, 2024
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Feb 23, 2026
#4
  • Feb 23, 2026
  • #4
Did the machine shop say anything about why they painted over those surfaces?
 

Noobz347

Stangnet Facilities Maint Tech... Er... Janitor
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Feb 23, 2026
#5
  • Feb 23, 2026
  • #5
gkomo said:
Did the machine shop say anything about why they painted over those surfaces?
Click to expand...

I'm going to go out on a limb and guess that it just doesn't matter.

If it does, what is the downside to installing the gaskets over the paint? The way I see it, it is as good as an anaerobic sealer.
 
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ctandc

5 Year Member
Oct 28, 2017
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Feb 23, 2026
#6
  • Feb 23, 2026
  • #6
If it won't come easily with lacquer thinner, do yourself a big favor and get a set of these:

https://www.amazon.com/OUXIO-Carbide-Scraper-Automotive-2-Piece/dp/B0D2R87J26/ref=sr_1_4?s=automotive&sr=1-4

I've used these for years and they can't be beat for getting machined surfaces cleaned up. Add to that a pack of plastic razor blades. Trust me - once you'll try those scraper you'll understand.
 
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