Valve to Guide Clearance Measurement
If a small bore gauge is not available, inspect the valve guide wear by
measuring the valve to valve guide clearance with the wobble method
as indicated below.
Insert a new valve [A] into the valve guide [B] and set a dial gauge
against the stem perpendicular to it as close as possible to the
cylinder head mating surface.
Move the stem back and forth [C] to measure valve/valve guide
Valve/Valve Guide Clearance (Woble Method)
Repeat the measurement in a direction at a right angle to the ﬁrst.
If the reading exceeds the service limit, replace the guide.
The reading is not actual valve/valve guide clearance because the
measuring point is above the guide.
ENGINE TOP END 4-25