Ever since I bought my 1972 MGB it had a slight backfire when shifting with
any slight load on the engine. In the time I have had my MGB, I have
replace the manifold gaskets and exhaust(donut). Yesterday while drive I
blew the manifold gaskets or exhaust(donut), no exhaust at the muffler and
very loud. I am in the process of finding which one went, but this brings
up a question of what is causing it. Talking to a non-MGB mechanic friend,
he thought it was a restricted/blocked exhaust and the backfiring was from a
leak into exhaust (air hitting the unburned fuel). With this does anyone
have a suggestion of better gaskets or gaskets prep. The manifold gasket
shouldn't be a problem but the donuts seem really cheap, are there any
better one I could buy? Is there a way of checking the exhaust besides
cutting it apart?
Thank you,
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