340 Cold Valve Lash Unknown Cam

RRR,
Post #9. Loose can damage the valve train, so if lash is unknown, better to set tight. It will NOT cause damage to set to 012-014. Setting too tight, like 6 or 8, might cause burned exh valves because the valves are not seated long enough to transfer heat to the valve seats. Really only likely on very long duration cams.