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-   -   Lapping the block and cleaning it before hg replacement. (http://www.toyota-supra.info/forums/mkiii-supra/16944-lapping-the-block-and-cleaning-it-before-hg-replacement.html)

jdmsoup 05-19-2010 07:06 PM

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.

batmmannn 05-21-2010 05:14 AM

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.

turbonicsperformance 05-22-2010 05:00 AM

Quote:

Originally Posted by jdmsoup (Post 83282)
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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