Valve clearance check

[Grumpy Goat]

Actually, with wear of the valves, it is more likely that they will tighten up (as the valves tend to "sink" into the seats).

The shims do not wear.

You are probably right on the first bit ... never thought of that. As the valves wear at the interface with the cylinder head, assuming they wear evenly all around, they will tend to "rise up" and hence decrease the gap at the top in way of the cams.

All parts subject to friction wear. It is just that the cams / shims / followers will most likely wear at a much slower rate than the valve seats.

Thanks for pointing this out. Now I am wondering ... if some of my valves are at the lower end of the range, there is not much leeway for the closing up of the clearances due to valve seat wear ...

But that is a worry for another day ... TDC as "found" using the DIY tool has some inaccuracy in it as well, and that can also introduce some variance in the clearance measurements, so I am not bothered.