that was my second guess...and I tried to pinpoint
from exactly where the sound is coming from with my stethoscope, but I can't for
sure..It definetely is coming from the center of the manifold area in towards
the engine block but although I hear some sound and leakage when I try to get
the scope end near the block/manifold joint, but it doesn't seem to be of the
magnitude that would cause such a large noise. So my suspicion is that it could
be a crack on the inside of the manifold and what I hear in the stethoscope is
just an echo or a "bounce" near the manifold engine joint...hard to say and
impossible to see due to the awkward way the manifold arches upwards making a
visual inspection next to impossible...I'm going to try with a little mirror and
an LED light maybe to see if I can get a glimmer of any crack...the other thing
is that I don't really see any exhaust residue anywhere near the manifold/engine
joint, and with a leak this bad, you would definetely expect some if it where
coming from a blown manifold gasket....
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