I agree with Bob. I have never heard of extra strength head studs.
I don't reuse them, as they stretch. All head studs stretch, and should
be
replaced when building an engine.
Some other cause can lead to blowing head gaskets. If one carb is rich,
and
the other lean, that makes one side cooler than the other, one expands
differently
than the other. Or, some other flow obstruction, on either the intake
or exhaust side.
Are you checking the head and block to verify that they are both flat
and level?
After each gasket failure?
John Seim
Irvine, CA
On Oct 1, 2007, at 10:22 AM, Bob Grunau wrote:
> Ok, but remember the MG "B" series engines are NF threads.
> XPAG is metric 10 x 1.5 mm head stud.
>
> In my experience, there is nothing wrong with original head studs with
> nuts
> torqued to 50 ft-lbs for a cast iron head.
> My TC race engine has an aluminum Lucas Laystall head and the nuts are
> torqued to 42 Ft-lbs.
> I doubt stronger head studs are necessary or even desireable, you
> might just
> bust something else??
>
> So far, I have never had a head gasket failure with either cast iron or
> aluminum heads. I think there is something else wrong.
> Good luck sorting it out. .
> Bob Grunau
>
> Check with Advanced Performance Technology, Riverside CA,
> 951-686-0260.
> They carry 190,000 psi studs for the B series engine, and might have
> for
> XPAG also.
> Bob
>
> On Sun, 30 Sep 2007 22:00:38 -0400 "KRISLYN COMPANY"
> <KRISLYNCO.LLC@roadrunner.com> writes:
>> hello again
>> was talking with a gent from new england area that rebuilds TD's etc
>> and he
>> indicated that there was a higher tensil set of head bolts made that
>> allow
>> higher torquing of the head bolts thus perhaps better head to block
>> fittment... both surfaces have been machined by a qualififed
>> machinist as
>> flat,, yet I have had trouble (4 gaskets to date fit and failed)
>> ...does
>> anyone know of these "stronger" bolts availability?
>> thanks again
>> rocky
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