Lapping the block and cleaning it before hg replacement.

[turbonicsperformance]

Originally Posted by jdmsoup

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