4. Regular inspection
66
2. Tightening cylinder head bolts after a repair. (Engine
co
ld)
DV2213045A_E
1) Tighten temporarily 1~2 threads by hands.
2) 1st step: Tighten to about 8kgf•m with a wrench.
3) 2nd step: Tighten to about 15kgf•m with a wrench.
4) 3rd step: Rotate 90° with a wrench.
5) Final step: Rotate 90° with a wrench.
6) After the first 10 to 20 hours of operation after a repair
turn the cylinder head bolts by a further 90°(1/4 revo-
lution).
7) After 400 hours of operation turn the cylinder
head
bol
ts by a further 90°(1/4 revolution).
Cylinder Compression Pressure
1. Start and warm up the engine.
2. Stop the engine and disassemble the fuel injectio
n
nozz
le holder assembly.
3. Install a special tool, compression pressure g
auge
adapt
er (EU.2-0532), in the fuel injection nozzle holder
hole.
DV2213046A
4. Connect the compression pressure gauge to the
adapter.
• If excessive torque may damage the cylinder
h
ead gasket, cylinder liner flange and cyli
nder
h
ead bolt, so keep the specified torque.
• When tightening cylinder head bolts after a repair
must always adjust the valve clearance.
The cylinder head bolts to be retightened must not
bolts loosened first, but simply tightened by a
further 90°(1/4 revolution) from their actual position.
1
Intake side injector
Exhaust side
4
3
5
6
2
• The two outside screws (intake and exhaust side)
must not be retightened.
• The cylinder head bolts to be retightened must
not be loosened first, but simply tightened by
a
f
urther 90°(1/4 revolution) from their actual posi-
tion.
• when a cylinder head has been removed th
e
cyl
inder head gasket must always be changed.
Standard
Above 28kg/cm
2
Tolerance limit
24kg/cm
2
Difference between each cylinder
Within ±10%
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