Yanmar 3JH4E, Service Manual

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4. Disassembly and reassembly
165
(19) Mounting the marine gearbox
1) Mount the damper disk to the flywheel.
2) Align the damper disk with the input shaft
spline and insert. Mount the marine gearbox
to the flywheel housing.
(20) Mounting the cylinder head
1) Put the cylinder head gasket on the cylinder
block, aligning it with the cylinder block
positioning pins.
Note:
Select the proper head gasket by the holes
for identifying.
2) Lift the cylinder head horizontally and mount it
aligning with the cylinder head gasket.
3) Coat the flange part and thread of the cylinder
head bolt with engine oil, and lightly tighten
the bolts in the specified order. Then tighten
completely, in the same order.
4) Measure the top clearance
Refer to 5.2.6
Tightening torque Nm (kgf•m)
1st step
Final
Cylinder head bolt 39.2-49.1
(4.0-5.0)
85.2-91.2
(8.69-9.30)
mm
Top clearance 0.74±0.06
Identification holes Identification holes
Head gasket
4JH4E 4JH4-TE/ 4JH4-HTE
7
9
1
2
10
8
6
4
12
14
13
11
3
5
Camshaft side
Fuel injection pump side
Gear case side
Flywheel side
011227-00E
13
11
15
17
5
4
7
9
3
6
1
2
12
14
10
8
18
16
Fuel injection pump side
Camshaft side
Gear case side
Flywheel side
011228-00E
Assembly (Head bolt tightening order)
Assembly (Head bolt tightening order)