[Healeys] no compression 100

[John Harper]

I fully agree with Alan and will also add that if anything significant 
is skimmed from the top of the block then you need to check the 
clearances of the pistons when at Top Dead Centre. With a standard head 
gasket you should be able to get away with a few thou. of piston top 
being proud of the block but any more and you need to check that the 
piston will not get too close to the centre of the head's heart shape. 
Compression Ratio will be increased when either the block or head are 
skimmed so it is best to take off as little metal as possible

Regards

>A word of caution here -
>
>Skimming the block and head on a 100 is only advisable as a last resort.
>The water jacket interface between the head and block are cut at an angle,
>this means if you skim the block too much the water holes start moving out
>of alignment with the gasket and head.  Not a huge issue but if you intend
>to keep your car for a lifetime, skim the block only as a last resort.
>
>Alan
>
>'52 A90
>'53 BN1
>'64 BJ8
>
>

-- 
John Harper