ENGINE
M6040, M7040, WSM
1-S40
Selecting Cylinder Head Gasket
Replacing the Cylinder Head Gasket
1. Make sure to note the notch (a), (b) or (c) of cylinder head
gasket (1) in advance.
2. Replace the same notch (a), (b) or (c) as the original cylinder
head gasket (1).
Selecting the Cylinder Head Gasket
• Select the cylinder head gasket (1) thickness to meet with the
top clearance when replacing the piston, piston pin bush,
connecting rod or crankpin bearing.
1. Measure the piston head's protrusion or recessing from the
crankcase cylinder face 4 spots per each piston and (average of
four pistons) using the dial gauge as shown in figure.
2. Select the suitable cylinder head gasket refer to the table below.
9Y1210143ENS0060US0
Notch of
Cylinder
Head
Gasket
Thickness of cylinder
head gasket
Part
Code
Piston Head's protrusion
or recessing from the
level of crankcase
cylinder face.
(average of 4 pistons)
Before
tighten-
ing
After
tighten-
ing
Without
notch (a)
1.10 mm
0.0433 in.
1.00 mm
0.0394 in.
1G777-
03610
0.250 to 0.3425 mm
0.0098 to 0.0135 in.
1 notch
(b)
1.00 mm
0.0394 in.
0.90 mm
0.0354 in.
1G777-
03600
0.150 to 0.250 mm
0.0059 to 0.0098 in.
2 notches
(c)
0.90 mm
0.0354 in.
0.80 mm
0.0315 in.
1G777-
03310
0.0775 to 0.150 mm
0.0031 to 0.0059 in.
(1) Cylinder Head Gasket
(2) Measuring Point
A: Front Cover Side
B: Flywheel Housing Side
C: Notch of Cylinder Head Gasket
(a) Without Notch
(b) 1 Notch
(c) 2 Notches
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