42 KENR6933
Troubleshooting Section
•
Cylinder head
•
Cylinder block
Recommended Actions
Engine Oil Cool
er
1. Drain the engine lubricating oil from the engine.
2. Check for leaks in the oil cooler assembly. Refer
to Testing and Adjusting, “Cooling System” for the
correct proce
dure. If a leak is found, install a new
oil cooler. Refer to Disassembly and Assembly,
“Engine Oil Cooler - Remove” and Disassembly
and Assembly
, “Engine Oil Cooler - Install” for the
correct procedure.
Cylinder Hea
d Gasket
1. Remove the cylinder head. Refer to Disassembly
and Assembly
, “Cylinder Head - Remove” for the
correct procedure.
2. Inspect the
cylinder head gasket for faults and any
signs of leakage.
3. To fit a new cy
linder head gasket, refer to
Disassembly and Assembly, “Cylinder Head -
Install” for the correct procedure.
4. If there was no obvious signs of a faulty head
gasket proceed to “Cylinder Head”.
Cylinder Head
1. Check the c
ylinder head for flatness. Refer to
Testing and Adjusting, “Cylinder Head - Inspect”
for the correct procedure.
2. Check the mating face of the cylinder head for
faults and signs of leakage. If a fault is found,
replace th
e cylinder head. If signs of leakage are
found, determine the cause of the leakage. Refer
to Testing and Adjusting, “Cylinder Head - Inspect”
for the co
rrect procedure.
3. Check the internal core plugs in the cylinder head
for signs
of leakage.
4. If the cylinder head is flat and if the cylinder head
does not h
ave any faults, refer to “Cylinder Block”.
Cylinder Block
Inspect the top face of the cylinder block for faults
and signs of leakage. If a fault is found, replace
the cylinder b
lock. If signs of leakage are found,
determine the cause of the leakage. Refer to Testing
and Adjusting, “Cylinder Block - Inspect” for the
correct proc
edure.
Assembly after Repair
1. Install the cylinder head. Refer to Disassembly
and Assembly, “Cylinder Head - Install”.
2. Remove the oil filter element. Install a new engine
oil filter element. Fill the engine with clean engine
oil to the cor
rect level. Refer to the Operation
and Maintenance Manual, “Engine Oil and Filter
- Change” for more information.
i02528229
Coolant Temperature Is Too
High
Note: This is not an electronic system problem.
Probable Causes
•
Radiator fi ns
•
Coolant level
•
Radiator cap and/or pressure relief valve
•
Coolant temperature gauge
•
Restriction in the coolant system
•
Water temperature regulator
•
Engine cooling fan
•
Coolant pump
•
Cylinder head gasket
Recommended Actions
Radiator Fins
Check the radiator fi ns for dirt, debris, and/or damage.
Remove any dirt and/or debris and straighten any
bent fins.
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