Important stuff. If there is not enough clearance the valves do not stay closed long enough to dissipate the heat and can eventually keep the valves from completely closing which will burn them. Timing can also be effected, being slightly retarded. Important stuff, probably ignored by some?Yesterday, I tackled a more challenging maintenance task: adjusting the valve clearances on the Vetus M3.10 inboard marine diesel engine, which the owner's manual recommends every 800 hours. It appeared it had not been done for 18 years, based on the yellow paint on the crankshaft pulley obscuring the marks, which I had to chip off with a screwdriver to locate the marks. The most difficult part was rotating the engine the proper 240 degrees each time to position the cylinder at top dead center for each cylinder. It was interesting to watch the intake and exhaust sequence for the entire engine as it rotates. The engine runs smoother now, especially in idle (less of a rattling sound). Here are my photos and videos:
Engine sounds good
Paul T