ServiceManual

ToC
05 COOLING SYSTEM
SERVICE MANUAL MARINE ENGINES
4 Cooler cap
No special tools required.
Control works:
As a standard, a cooler cap with an opening
pressure of 1,0 bar is used. Check cooler cap
for correct rated output, defective sealing (ill.2/
pos.1), defective vacuum valve (ill.2/pos.2) or
broken spring (ill.2/pos.3).
Repair works:
Not provided; exchange cooler cap.
2
3
1
5 Coolant loss in closed engine cooling system
00.06 ill.2
5.1 Coolant loss:
Control works:
- (item 4) check cooler cap
- defective exhaust manifold (exhaust gases reach the engine cooling circuit)
- defective monoblock (due to combustion pressure, gases reach the engine cooling system).
5.2 Gas-air mixtures reach the cooling system.
5.2.1- Defective exhaust manifold
Control works:
05.01.03 Check exhaust manifold heat exchanger.
5.2.2 - Defective (leaky) monoblock
Control works:
Use special tool SMO: VR00147/0 by using enclosed instruction.
Conclusion: Gas entry (combustion pressure) in the engine cooling circuit.
Control works:
Assembly of unit injector, refer to 03.02.02 "ASSEMBLY" item 11; check specified
tightening torque.
Repeat check. If result remains unchanged, the monoblock is defective.
Repair works:
Not provided; exchange monoblock.
Page COOLING SYSTEM - 12 Z001019/0_6_July 2008