cam/valve clearance specs Q - Saab 900 Bulletin Board - Saabnet.com
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cam/valve clearance specs Q
Posted by MS (more from MS) on Sun, 14 Apr 2002 18:44:53
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Following up on the head gasket replacement (1982 turbo 8 valve) a few weeks ago, today I checked the cam to valve tappet clearance with a feeler guage. The measurements were consistent for both the intake and exhaust. However, they were a pinch smaller than spec for both. The manual states from between .008 to .010 for the intake and between .018 to .020 for the exhaust. Mine were .007 for the intake and .015 for the exhaust. I'm guessing this means that both the intake and exhaust valves open that much sooner and close that much later in the combustion cycle.
How about it? Time for a new set of shims? Is the performance harmed in any way with a slightly shorter distance than spec for the cam/valve tappets? If so, how is the performance hindered? Expert insight is most welcome. All theories will be considered.
posted by 64.12.10...
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