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F8QT ENGINE -
Camshaft, Intake and Exhaust Valves
11A-13-4
INTAKE AND EXHAUST VALVES
Examining the valve stem for wear
(1) Replace the valve if the valve stem diameter is smaller
than the limit value or if there is evidence of uneven
wear.
NOTE
If the valve
16, 17
is new, it should be matched with
the valve seat
24, 25
by grinding them together.
Valve seat angle and valve seat margin
(1) Replace the valve
16, 17
if the limit value is exceeded
after correcting the valve seat angle.
A
: Valve seat angle.
B
: Valve seat margin.
VALVE AND VALVE GUIDE
(1) Replace the part in question if the clearance exceeds
the limit value.
VALVE AND VALVE SEAT
(1) Smear a layer of Minium evenly on the valve seating
A surface of the valve seats
24, 25
.
(2) Press the valve
16, 17
once against the valve seat
24,
25
, making sure that the valve does not rotate.
B
: Grinding tool.
NOTE
Before checking the valve contact, examine the valve
16, 17
and the valve guide
22, 23
carefully to check
whether their condition is normal.
(3) Determine the condition of the valve seat by means of
the Minium pattern on the valve
16, 17
. If abnormal contact
is established, take the following measures:
Small deviation: Grind the valve so that better contact
is obtained.
Large deviation: Correct or replace the valve and valve
seat.
PWEE9602
E
July 1996Mitsubishi Motors Corporation
4ME0122
4ME0123
16, 17
A
B
REN0059
REN0060
4ME0126