> Reply-To: jtilton@vt.edu (Jay Tilton)
>
>
> Are most head bolts that hard (grade 9, that is), or are they peculiar to
> the diesel--necessary to keep the heads from flying off? If the head bolts
> in our MG's are that hard, the brittleness alone would be reason enough for
> me to think twice about reusing them.
I believe that most head bolts are grade 5 to grade 8. My head bolt may
have been grade 8 but I think the markings indicated a grade 9. That
engine has 22:1 compression and still has a tendency to squirt head
gaskets out into the cylinder area.
- -Mark
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