pulled the heads off a friends '72 last night....have a question - The 1947 - Present Chevrolet & GMC Truck Message Board Network

superchevy · 08-22-2003, 01:01 PM

The valve seals were leaking oil into the cylinders pretty bad, so we pulled the heads off to have them rebuilt. The cylinders look pretty good, not much of a ridge - can still see a little crosshatch on the walls, so my buddy is just going to put the rebuilt heads back on.
The question is, there is a lot of carbon build-up on the piston tops from the oil burning; whats the best way to get this off the piston tops...scrape it? anybody use anything to maybe soften it up first?...wire brush?
Thanks, SC

08-22-2003, 01:01 PM	#1
superchevy Got big-block? Join Date: Jul 2000 Location: Austin, Texas Posts: 2,453	pulled the heads off a friends '72 last night....have a question The valve seals were leaking oil into the cylinders pretty bad, so we pulled the heads off to have them rebuilt. The cylinders look pretty good, not much of a ridge - can still see a little crosshatch on the walls, so my buddy is just going to put the rebuilt heads back on. The question is, there is a lot of carbon build-up on the piston tops from the oil burning; whats the best way to get this off the piston tops...scrape it? anybody use anything to maybe soften it up first?...wire brush? Thanks, SC



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