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Old 03-09-2004, 08:00 PM
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Removing Head Gasket from Block

Hello,

I am putting new head gaskets on my chevy 350 but I need to get all of the old gasket off first. What is the best way for me to remove the headgasket from my block?

Thanks

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Old 03-09-2004, 08:31 PM
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Putty knife/gasket scraper and sweat!
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Old 03-09-2004, 08:42 PM
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Agreed,and then some more. For a final touch,I use a 3M pad,they look like a kitchen pan cleaner,they are just more aggressive.
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Old 03-09-2004, 10:14 PM
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Permatex Gasket Remover does a great job.

Royce
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Old 03-10-2004, 12:04 AM
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I like 3 in 3m scotch brite pads on a die grinder works great!
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Old 03-10-2004, 12:11 AM
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3m makes a plastic (hair brush) for a angle die grinder, works good.

Troy
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Old 03-10-2004, 01:14 AM
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I wouldn't use abrasives if I planned to just put the gaskets on without disassembling & cleaning the engine. I'd stick with gasket remover & scrapers & a strong vacuum cleaner.
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Old 03-10-2004, 01:18 AM
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Once I pull the heads, if I'm not going to fuss with taking the pistons out I'll stuff rags into the bores first, scrape all the old gasket off, then polish the rest off with a brass or copper wire brush drill attachment. Could also use a buffing attachment.
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Old 03-10-2004, 04:23 AM
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In thirty + years of building engines I've seen a lot of block decks ruined by the Scotchbrite pads in a die grinder, many done by ASE and certified "mechanics". In the shop I do use the green and the yellow "hairbrush" pads, they are less aggressive.
As for the wire brush. I've seen two instances of the brush wires breaking off in normal use and getting into the oil pump, locking up the pump, twisting off the pump driveshaft= engine failure! Be careful.
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Old 03-10-2004, 07:54 AM
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Do not, repeat, DO NOT use any Scotch-Brite abrasive pads of ANY type on an assembled engine. Aside from causing uneveness on the deck surface, the abrasive pariticles will get into the cylinders and oiling system NO MATTER HOW CAREFUL YOU ARE. I have see literally score of engines damaged or ruined by the abrasives getting into the oil. A scraper is by far the best way to get the surface cleaned without causing further damage to the engine. I have also seen locked up oil pumps from wire brushes, as BOBCRMAN says.
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Old 03-10-2004, 11:00 AM
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Yeah, I agree... those scotchbrite pads are a lot more abrasive than you realize... once I was trying to use one to clean off some overspray that got on my windshield. OUCH screwed up my new windshield.

the blonde weasel
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Old 03-10-2004, 12:17 PM
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I have to agree on the non-use of abrasives pads! I myself use a sharp chisel and acetone thinner to clean the deck surface. Now I'm not advocating using lots of thinner, but a damp rag works fine. Remember the sandwich type head gaskets can handle any irregularities on the deck surface (within reason), so the deck doesn't have to look like it was just machined. Good Luck!
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Old 03-10-2004, 06:44 PM
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I wasn't talking about a 3M pad with a power tool,they are abrasive,like a grinding disk, but you would have to be brain dead to remove to much by hand. I should have noted they are abrasive but they do work well as a final touch up I think,just pay attention.
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Old 03-10-2004, 06:50 PM
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permatex gasket removal is the best!
i even used it as paint stripper.
took the paint clean off my car.
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Old 03-10-2004, 06:53 PM
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That is good stuff.
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