John Runberg wrote:
> Hmm... this would imply that all head gaskets, when all else is equal, should fail at a similar rate. Even someone who drives more aggressively (but doesn't overheat) shouldn't fail significantly faster, but this doesn't seem to be the case.
>
> john
>
>
>>Yup, the gaskets harden with age and start to leak. They live a hard
>>life, dealing with pressure, wide temperature swings, and expanding and
>>contracting metal.
>
>

Lets combine two threads:
   Last week I had the push rod tube shields off my '91 and I was poking
at the head gaskets to see if they seemed to be hardening.  I was very
tempted to rub some 303 protectant on them.

Larry A.