I believe it to be very important to replace cylinder head bolts,
if you torque them up, then turn them x degrees more. This is
done on most modern cylinder heads. I think it is not so vital
if the cylinder head bolts do not have to be tightened by x
degrees farther. These bolts should not be stretched when torqued.
Have you noticed that cars which specify torquing and turning
by x degrees are less likely to have a blown head gasket than
the old fashioned method.
I would however replace them as a matter of course anyway, but
that's just belt a braces.
--
James Carpenter
Yellow '79 spit wired by a trained marmot
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