Mitsubishi S12A2, Service Manual

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Chapter 7 ASSEMBLY OF BASIC ENGINE
5.2 Valve Sinkage - Measure
Measure the valve sinkage.
If the value exceeds the limit, replace the valve or valve seat
with a new one.Lap the valve and valve seat whenever valve
or valve seat is refaced or replaced.
Valve Sinkage - Measure
5.3 Tappet - Install
Apply engine oil to the tappet outside face, insert tappet into
tappet hole and place the tappet softly on camshaft.
Tappet - Install
5.4 Liquid Gasket - Apply
(1)
Wipe off oil, grease and other contamination from the
cylinder head gasket, cylinder head bottom surface and
crankcase top surface.
(2)
Apply a thin coat of liquid gasket to both sides of cylin-
der head gasket around tappet holes and oil pas-
sages.Beads of liquid gasket is 5 to 8 mm [0.20 to 0.31
in.] from the cylinder head gasket outer edge with a
thickness of 0.2 to 0.5 mm [0.008 to 0.020 in.]The area
of application is shown on the right.
Note: After the application of liquid gasket to cylinder head
gasket install the cylinder head before liquid gasket
dries.
Liquid Gasket - Area of Application (Head Side)
Liquid Gasket - Area of Application (Crankcase Side)
Item Standard value Limit value
Valve sinkage
-0.1 to 0.1 mm
[-0.004 to 0.004 in.]
0.5 mm
[0.019 in.]
Valve margin
Valve sinkage
Seat width
V
alve seat angle
Apply engine oil
(a) Do not apply liquid gasket excessively.It results in
O-ring deformation.Be careful to apply gasket to
portions A and B. The space to O-ring is very nar-
row.
(b) Do not apply liquid gasket around the periphery of
cylinder bore.It results in gas leakage.
5 to 8 mm
[0.20 to
0.32 in.]
10 mm
[0.39 in.]
A
Never allow liquid
gasket to adhere to
this area.
Liquid gasket coating area
Liquid gasket:
ThreeBond 1211
P/N:37594-01300
5 to 8 mm
[0.20 to 0.32 in.]
10 mm
[0.39 in.]
B
Never allow liquid
gasket to adhere to
this area.
Liquid gasket:
ThreeBond 1211
P/N:37594-01300
Liquid gasket coating area