Valve Adjustment After Rebuild

[Guest]

Hello.

Any advise on measuring valve tolerances after a rebuild and valve lapping? Should I follow standard procedure or run the engine and then check?

Thanks.
Zac

[Nessism]

Measure and adjust before firing the engine, and then again at 600 miles or so when you torque the head again.

[Big T]

Definitely check the clearances.

Cutting seats/lapping will decrease the clearances

[bwringer]

Agreed. Check before running the engine.

If you've cut the seats, you might need to put the head on a stand (so the valves don't hit the bench), install the camshafts temporarily, and check clearances there in case you need to tip the valves. Lapping the seats shouldn't change clearances by all that much, so you could check these as normal after the head is installed.