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Old 05-19-2010, 08:06 PM   #1
jdmsoup
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Default Lapping the block and cleaning it before hg replacement.

As some of you know im in the middle of putting a new headgasket on my mk3 and i was wondering if anybody had any tips and advice for cleaning the top of the block and giving me a smooth surface for the hg. im using a fel-pro hg with the permatex copper spray that i was recommended. I know a stock headgasket is a little forgiving but i would still like to have a good clean surface. im jsut worried about getting stuff in the holes in the block. so any help would be greatly appreciated. thanks in advance.
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Old 05-21-2010, 06:14 AM   #2
batmmannn
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Default Head Gasket

Do search for Head gasket there is a real nice thread from a guy named Andy from New Zealand that goes over the sandpaper block routine for lapping your block.
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Old 05-22-2010, 06:00 AM   #3
turbonicsperformance
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Default

Quote:
Originally Posted by jdmsoup View Post
As some of you know im in the middle of putting a new headgasket on my mk3 and i was wondering if anybody had any tips and advice for cleaning the top of the block and giving me a smooth surface for the hg. im using a fel-pro hg with the permatex copper spray that i was recommended. I know a stock headgasket is a little forgiving but i would still like to have a good clean surface. im jsut worried about getting stuff in the holes in the block. so any help would be greatly appreciated. thanks in advance.

i dont like the spray ive seen it cause blown head gaskets it is good for a pitted surface but when it gets around the cylinders it creates uneven points and gives a higher chance of blowing the gasket again gm had a bulletin about it about 2 years ago because techs were using it on the northstar and it would cause a blown gasket
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