Put my rebuilt head on last weekend.. (& got some lessons learned that I'll
write-up later, if only for everybody's amusement). I'm having problems
getting a good seal with the manifold.
For now, I'm curious what kind of experiences people have had when
re-mounting their manifold assembly on their 235's. I put mine on (as one
unit), but wasn't able to get a good seal w/ new manifold gaskets. Took it
off, sure enough, there was a sleeve ring out of alignment. Fixed that,
checked the others, and remounted, this time torqueing the hell out of the
bolts. Still a leak. Took it off yet again, called my machinist to see if
by some chance he had shaved the manifold side of the head. Nope- but did
get the hint from him to mount the intake and exhaust manifolds separately
(which seemed quite a trick to me, given the shared mountings and the 2-up,
2-down bolt set up).
Loosened up the 4 bolts that join the manifolds together, retightened the 6
manifold-to-head bolts, and then retightened the 4 manifold assembly bolts.
Still getting leakage (at least from the exhaust, very obvious). I
checked my exhaust master ring, and that seals good, so I can rule that out.
I had to completely re-adjust my valves and am still getting some
performance problems (I'm not done with that yet.. and can't hear clicking
to adjust, with that damn manifold twacking away), but I am guessing until
I get this manifold gasket problem taken care of, I'm gonna get sporadic
lean fuel/air mixture, which doesn't make tuning any easier.
Has anybody run into this? What's the trick?
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