yes.

and you were talking of guides not seals as was thought by the prev poster.

and yes, a vacuum guage can reveal poorly sealing valves. the fluttering is indicative of valve issues. i dont think the seals would have any effect on the vac reading.

and that engine has hydraulic adjusters so you cannot adjust them to solve the problem. i suppose loose guides may cause the valves to rattle around and not seal well.

tom w

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[SIGPIC] Diesel loving autocrossing grandpa Architect. 08 Dodge 3/4 ton with Cummins & six speed; I have had about 35 benzes. I have a 39 Studebaker Coupe Express pickup in which I have had installed a 617 turbo and a five speed manual.[SIGPIC]

..I also have a 427 Cobra replica with an aluminum chassis.