Marc,
When I installed the HS4's on my 77B I saw that the problem was due to the
fact that the intake manifold flanges were of a different thickness than the
exhaust manifold flanges. My solution was to make up a series of 'D' shaped
washers to slip over the studs until the thin flanges were at the same height as
the thick flanges. Then the manifold mounting washers could clamp the manifolds
down until they sealed. It worked for me, but YMMV.
Bud Krueger
52TD
Marc Siegel wrote:
> As usual, thanks for all the replies (just gotta love this list!!). So,
> having actually done things correctly, I still have leaks at the intake
> manifold. I had determined this by spraying carb cleaner and noting the
> definite change when I hit the leaky spots with the spray.
>
> As noted, I used cut washers to shim the difference, but although it's not
> as leaky as it was, it still leaks. I made sure that the surface of the head
> was clean, used a brand new, undamaged gasket, and made sure the flanges on
> the intake manifold were clean. I had also had a machine shop put the
> manifold on their belt sander to make sure the flanges were clean, smooth
> and true.
>
> Any tricks that may be helpful here? Is a double gasket a really bad idea? I
> guess the proper thing is to have it planed down to match the exhaust
> header, but it seems like I should have been able to get a good seal by
> using the washers to shim it. When I disassemble it again, I'll check the
> head with a straight edge as was suggested to me...
>
> Learning a lot (mostly about what NOT to do!)...
>
> '73 MGB
> '80 MGB
> --
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