Checking Valves - Westerbeke 9.0 BCG Technical Manual

3. Place a clip on the new valve guide and drive it in from the opposite side of the combustion chamber with
the valve guide installer.
NOTE: The shape of the intake valve guides differs from that of the guides on the exhaust
side.
4. Install the valve seal on the valve guide with a
valve seal pusher.
5. Check the clearance for each new valve guide
bushing.
Projection Height (Dimension A):
0.598 - 0.622 inches (15.2 -15.8 mm)
Checking Valves
1. Check the contact surface of the valve face and valve seat for damage. Minor or rough surface may be
repaired with a valve grinder.
2. If the valve stem is worn, damaged, bent or the
end surface of the stem is dented, replace the
valve.
3. Check the valve stem's diameter with a
micrometer; if the stem is worn beyond the al-
lowable limit, replace the valve.
Valve stem diameter limit:
Specified Limit
Intake:
0.2734 - 0.2740
inches
(6.945 - 6.960 mm)
Exhaust: 0.2732 - 0.2738 inches
6.940 - 6.955 mm)
Allowable Limit
Intake:
0.2724
inches
(6.920 mm)
Exhaust: 0.2720 inches
(6.910
mm)
Westerbeke Generators
\~---+----~
U I
( vie stem outer diameter
1- - Valve head stock thickness
",--
...
88