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Removing old stubborn head gasket material.
Posted: Thu Feb 11, 2021 10:30 am
by willstone
Any tips for removing old strongly attached head gasket material from aluminum cylinder top. I don't wanna scratch it. Does Gasket Remover actually work? What does work? This is on a 1975 R90/6.
Re: Removing old stubborn head gasket material.
Posted: Thu Feb 11, 2021 10:36 am
by schrader7032
Years ago on the overhaul of my /7, I soaked the piston crowns in Hydroseal II by Gunk for about a week. I was then able to scrape off the carbon build up with some sharp pieces of wood.
Re: Removing old stubborn head gasket material.
Posted: Thu Feb 11, 2021 11:22 pm
by willstone
Nothing has worked so far. Permatex gasket remover did absolutely nothing. I tried paint and shellac remover. Nothing. I have been unable to remove the remaining head gasket residue. I am perplexed. Any suggestions out there?
Re: Removing old stubborn head gasket material.
Posted: Wed Oct 13, 2021 9:30 pm
by jimcarrr100rs
I have used razor blades (very carefully)
Re: Removing old stubborn head gasket material.
Posted: Thu Oct 14, 2021 8:32 am
by jwonder
I agree with razor blades and being careful. Use them at a very shallow angle and flat. I have scraped a lot of aluminum heads of all types with razor blades.
Re: Removing old stubborn head gasket material.
Posted: Mon Nov 22, 2021 1:28 pm
by cbclemmens
Walmart sells a scraper that is perfect for this job. It has a wide razorblade scraper blade. Just keep it flat and dont push too hard.
Craig
Re: Removing old stubborn head gasket material.
Posted: Thu Nov 25, 2021 2:01 pm
by strichzwei
Heat is your friend!
Re: Removing old stubborn head gasket material.
Posted: Thu Dec 02, 2021 12:50 am
by LesCriess
Not sure about aluminum heads but, I've used oven cleaner on cast iron heads/cylinders with good results. Spray it on, let it set for a bit, & scrape the gunk off. Other's thoughts about usage on aluminum??
Re: Removing old stubborn head gasket material.
Posted: Sat Dec 04, 2021 12:59 pm
by cbclemmens
Most oven cleaners contain lye, Sodium Hydroxide. That can dissolve Aluminum. Not a good idea.
Craig
Re: Removing old stubborn head gasket material.
Posted: Sun Dec 05, 2021 11:15 am
by LesCriess
Ah....