Troubleshooting

Table 61
Troubleshooting Test Steps
Values Results
1. Lubrication
A. Remove the valve mechanism cover. Refer to Disassem-
bly and Assembly, “Valve Mechanism Cover - Remove and
Install” for the correct procedure.
B. Crank the engine and check the lubrication in the valve
compartment. Ensure that there is adequate engine oil flow in
the valve compartment. The passages for the engine oil must
be clean.
Note: Do not run the engine with the valve mechanism cover
removed.
Lubrication Result: The oil flow to the valve mechanism is insufficient.
Repair: Make sure that the passages for the engine oil are
clear.
Result: The oil flow to the valve mechanism is OK.
Proceed to Test Step 2.
2. Valve Train Components
A. Inspect the following components of the valve train for ab-
normal or excessive wear, straightness, and cleanliness:
· Rocker arms
· Pushrods
· Hydraulic lifters
· Camshaft
· Valve stems
· Rocker shafts
Valve train
components
Result: A valve train component is worn, bent, or not clean.
Repair: Repair or replace the component. Refer to Disassem-
bly and Assembly.
Note: If the camshaft is replaced, new valve lifters must also
be installed.
Result: All the valve train components are OK.
Contact the Dealer Solution Network (DSN).
UENR0612-07 123
Symptom Troubleshooting
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