Cylinder Head and Valves
02
020
18
RG,RG34710,69 –19–01NOV00–2/2
2. Obtain coolant and oil samples for further analysis.
3. Start and warm up engine if it can be safely operated.
Examine all potential leakage areas again as outlined
previously. Using appropriate test and measurement
equipment, check for the following:
• White smoke, excessive raw fuel, or moisture in
exhaust system.
• Rough, irregular exhaust sound, or misfiring.
• Air bubbles, gas entrainment in radiator or overflow
tank.
• Loss of coolant from overflow.
• Excessive cooling system pressure.
• Coolant overheating.
• Low coolant flow.
• Loss of cab heating (air lock).
4. Shut engine down. Recheck crankcase, radiator, and
overflow tank for any significant differences in fluid
levels, viscosity, or appearance.
5. Compare your observations from above steps with the
appropriate diagnostic procedures in Section 04, Group
150. If diagnostic evaluations and observations provide
conclusive evidence of combustion gas, coolant, or oil
leakage from head gasket joint, the cylinder head must
be removed for inspection and repair of gasket joint
components.
CTM100 (06APR04)
02-020-18
P
OWER
T
ECH
10.5 L & 12.5 L Diesel Engines
040604
PN=90
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