If you have valve train noise from excessive clearance this will put a greater load on the valves and valve train components
and will eventually damage the camshaft lobes, rocker arms and the tips of the valves themselves.
Too much clearance causes a rattling sound and lackluster performance. Operating with too much clearance leads to less overall damage than operating with tight clearances.
The valve timing is also affected by loose valve clearance and will actually retard the cam timing to the valves with this issue along with not opening the valves as far and reducing overall power.
Max.
