Quote:
Originally Posted by steve25
I take issue with that statement that Pontiac used positive seals on the intake guides of all 67 and up 4 bbl base line motors because I have never seen such.
I have disassembled at least 80 stock heads in my life between working at a machine shop and my own motors and I have never seen such and also not to mention that the Pontiac parts break down drawing don’t show any either!
The parts break down’s only show the valve stem o-ring oil seal as in this photo here.
Note item number 10.
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I wrote "high performance 4-barrel engines" NOT "4 bbl base line motors".
There is a difference.
And, your Pontiac illustration catalog picture shows an exhaust valve, exhaust valves did NOT use positive seals as i stated.
Also, take a look in the Parts&Accesories catalog group 0.308 and youŽll find #9790818 (positive) 8 seal, intake valve stem oil (w/retainer rings) for 1962-74 All engines. (As required for engines using them, of course!).
FWIW