4. Regular inspection
66
2. Tightening cylinder head bolts after a repair. (Engine
cold)
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
bolts 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 injection
nozzle holder assembly.
3. Install a special tool, compression pressure gauge
adapter (EU.2-0532), in the fuel injection nozzle holder
hole.
DV2213046A
4. Connect the compression pressure gauge to the
adapter.
CAUTION
•
If excessive torque may damage the cylinder
head gasket, cylinder liner flange and cylinder
head bolt, so keep the specified torque.
•
When tightening cylinder head bolts after a repair
must always adjust the valve clearance.
CAUTION
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 si
d
e injector
Exhaust si
d
e
4
3
5
6
2
CAUTION
•
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
further 90°(1/4 revolution) from their actual posi-
tion.
•
when a cylinder head has been removed the
cylinder head gasket must always be changed.
Standard
Above 28kg/cm
2
Tolerance limit
24kg/cm
2
Difference between each cylinder
Within
±
10%