Re: Setting Clearances

Posted by Bob Carabbio on Oct. 24, 1998 at 11:56:10

In Reply to: Setting Clearances
posted by Dave M on Oct. 24, 1998 at 01:04:46

Rods should be at 0.001 - 0.0025 as checked with Plastiguage at 45 ft pounds torque.
Wrist pins at 0.0003-0.0005.
Ring end clearance should be 0.012 to 0.015 for the top, 0.010-0.012 for the middle, and 0.008 - 0.010 for the oil ring.
There's some controversy about valves, but I've always set to the 0.010 - 0.013 spec generally going toward the 0.013 for the exhausts, and toward the 0.010 for the Intake. I prefer the original tappets instead of the modern adjustables.
Guide clearance should be 0.001-0.0015 for intakes, and 0.0015 - 0.002 for exhaust. This is not too critical, but if you're matching valves to guides, use the looser ones on the exhaust.
NOTE: Make sure your Exhaust valves are really exhaust valves while I know there are good magnetic exhaust valves out there, If you're not sure what you have, non-magnetic valves (stainless) are a safer bet for exhaust than magnetic ones which may be too soft (the old repro-part syndrome). I've seen valves with magnetic stems and non-magnetic heads which are O.K. also.

Follow Ups:
Setting Tappet Clearances Vince Falter Oct. 24, 1998 at 12:18:10 (0)

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