Doug -
MGBs used two different types of exhaust manifolds withthe SUs: pre- and
post '71. Can't remember which way around this is but one of them has
thicker "shoulders" than the other. If your's is mismatched to you intake
manifold, the inboard studs may snug up tight on the intake manifold while
not doing much for the exhaust manifold. The outboard studs pull the
exhaust manifold only, explaining why your's leaks only from #2 and #3.
It's worth checking...
Allen
>>List,
>>
>>Long time since I've posted but I need some help diagnosing a problem I am
>>having with a new Dual HS4 SU conversion I made on my 77B...<<snip>>
>>2. I have an exhaust leak at the head-exhaust manifold connection for #2 /
>#3.
>> I have used a single gasket that burned right through after 10 minutes and
>>over the weekend put on a double gasket but it also burned right through.
>Any
>>ideas on how to get rid of the exhaust leak? Is it possible that the
>exhaust
>>manifold needs to be milled straight? If so, who does this work? Are
>there
>>torque specs?
>>
Allen H. Bachelder =iii=<
Sinking Creek Home for Wayward MGs
New Castle, VA 24127
USA
540/544-7333
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