I removed the valve springs on number 3 intake and exhaust valves as they were recessed the deepest in the heads intakes at .052 and exhaust at .070. I installed some test valve springs on and set a dial indicator up on the retainer. Put head back on and torqued down. also by the way #3 cylinder piston protrusion is at .025.
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with my solid lifter in I set the rocker with 0 backlash (this pic is before I set up the intake the same way).
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In the exhaust up stroke and the valve is closing right around .152 I found my valve is closest to the piston.
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In fact so close when I push down the rocker it does not move which would be 0 clearance.
I really want to run this cam but my odds are stacking against me. What I do not have pictured is me checking the Intake valve clearance this way. I checked the Intake valve the same way and have plenty of clearance. I pulled the cam and retarded the cam an extra tooth and checked the clearance on the exh and int. I gained about .010 clearance on the exhaust, but still not enough. I set the cam timing to factory and then I start running into int clearance issues.
as stated piston protrusion .025, exh. valve recessed .070, cam timing is correct and still not enough clearance ***? not sure what I am missing. There is no way some one could take one of these cams, recess the valves all to .060 slap it together and run it. Did I get a bad cam grind??? It just does not add up why I can't get the clearances, I am not going to shave the pistons down, so back to stock cam....any one want a low mileage R&D camshaft??