Head gasket change difficult??

discomania said:

1 thou or "a thou" is 1 thousands of an inch or about 25micrometers - a hair is about 0.06mm or 60micrometers so it is very very small. You may even get more taken off the head if it needs it 10 thou which is about 0.25mm.

The reason for the tiniest of skims is it will leave you with a very very clean head, the machinist will pick up on any warps too and can advise on repair feasibility. It should cost you £20 and will be well worth the money because cleaning an alloy head with the care it requires can be a PITA and I am a great believer in paying a little here and there to make things easier in life.

Don't take any more off than you need is my motto - too much and you need to change gasket thickness and things as the head looses material the valves get closer to pistons!

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