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> Lets Talk About Lapping Cylinders, Have I got this right?
DuckRyder
post Dec 23 2003, 10:08 AM
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So, we leave out the "head gaskets" and lap the cylinders into the head?

1) I assume we are using valve-grinding compound.

2) I am going to insert each cylinder into the head where I am going to install it.

3) I spin said cylinder until I see a nice shiny ring on the head and rim of the cylinder.

Have I got that right?
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Jake Raby
post Dec 23 2003, 05:34 PM
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Use a piece of thick glass with 400 grit sandpaper to true the mating surfaces of the cylinderbefore you start.

Take Dykem machinist dye and coat the top of each cylinder. work with the 400 with the cylinder flat till the dykem is gone and the cylinder is as close to flat as possible.

Then use clover lapping compound to match each cylinder into the respectful register....... Lap till the thin gray ine is as wide as the cylnder.
CLEAN EVERYTHING SUPER WELL! Then coat the head surface with Permatex Copper coat. This will give a gooey compound and it will help create a carbon seal when the engine fires up. This way the engine seals its self!!

When the heads are torqued up use compressed air in the cylinder and use a match or lighter to look for leaks. They can be seen easily with the flicker of the flame..
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