
(Table 27, contd)
Troubleshooting Test Steps
Values
Results
5. Engine Accessories
A. Attempt to isolate the source of the noise.
Engine
accessory
Result
An engine accessory is the source of the noise.
Repair the engine accessory and/or replace the engine ac-
cessory, as necessary.
Result
An engine accessory is not the source of the noise.
Proceed to Test Step 6.
6. Valve Train Components
A. Check the valve lash. Refer to Systems Operation, Testing, and
Adjusting, “Valve Lash - Inspect/Adjust”.
B. Check for damage to valve train components. Remove the valve
cover. Check the following items for damage:
· Camshaft
· Valve springs
· Camshaft followers
· Rocker shaft
· Pushrods
Refer to the Disassembly and Assembly for additional information.
C. Check for valves that do not move freely. If necessary, remove
the cylinder head and inspect the valves.
Refer to the Disassembly and Assembly for additional information.
Valve train
Result:
The valve train components are damaged.
Make the necessary repairs, Verify that the repair eliminated
the noise.
Result:
The valve train components are not damaged.
Proceed to Test Step 7.
7. Gear Train and Components of the Lower End
A. Inspect the gear train and lower end components.
Gear train
Result:
The gear train or lower end components are
damaged.
Replace any damaged parts.
Result:
The gear train or lower end components are not
damaged.
Proceed to Test Step 8.
8. Crankshaft
A. Inspect the crankshaft and the related components. Look for
worn thrust plates and wear on the crankshaft.
B. Inspect the connecting rod bearings and the bearing surfaces
on the crankshaft. Make sure that the bearings are in the correct
position.
Crankshaft
Result:
The crankshaft or the related components are dam-
aged or worn.
Repair or replace any damaged parts. Verify that the repair
eliminated the noise.
Result:
The crankshaft or the related components are not
damaged or worn.
Contact the Dealer Solution Network (DSN).
66
UENR0612
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