Troubleshooting

52 RENR2696-01
Troubleshooting Section
3. Check the air intake and the exhaust system for
the following d
efects:
•
Blockages
•
Restrictions
•
Damage to the a
ir intake and exhaust lines and
hoses
4. Make all neces
sary repairs to the engine.
5. Ensure that the repairs have eliminated the
diagnostic co
de.
Turbocharger (if equipped)
Note: The turbochargers that are equipped on 1100
Series engines are nonserviceable. If any mechanical
fault exists t
hen the turbocharger must be replaced.
1. Ensure that the mounting bolts for the turbocharger
are tight.
2. Check that the turbocharger drain is not blocked
or restricte
d.
3. Check that the turbocharger housing is free of dirt
and debris.
4. Check the turbocharger for worn bearings. Refer
to Systems O
peration, Testing and Adjusting,
“Turbocharger - Inspect”. The turbochargers that
are equipped on 1100 series engines are not
serviceabl
e. If any mechanical fault exists then the
turbocharger should be replaced.
5. Check that
the turbine blades rotate freely on the
turbocharger. Refer to Systems Operation, Testing
and Adjusting, “Turbocharger - Inspect”.
6. Ensure that the wastegate on the turbocharger is
adjusted correctly. Refer to Systems Operation,
Testi n g a n
d Adjusting, “Turbocharger - Inspect”.
The adjustment of the wastegate is set at the
factory. If the adjustment of the wastegate is
incorrec
t then the turbocharger must be replaced.
7. Make all necessary repairs to the engine.
8. Ensure that the repairs have eliminated the faults.
Low Compr
ession (cylinder pressure)
1. Verify that the valve lash is correct. Refer
to System
s Operation, “Engine Valve Lash -
Inspect/Adjust”.
1. Remove the fuel injection nozzles and perform a
compression te
st. Refer to Systems Operation,
Testing and Adjusting, “Compression - Test ”data.
2. Make all neces
sary repairs to the engine.
3. Ensure that the repairs have eliminated the faults.
Examples of low compression are shown in the
following list:
•
Mechanical problem
•
Faulty piston
rings
•
Worn cylinder bores
•
Worn valves
•
Faulty cylind
er head gasket
•
Damaged cylinder head
4. Inspect the internal engine components. Replace
any worn components.
i01798129
Excessive Valve Lash
Note: This is NOT an electronic system problem.
Refer to Testing and Adjusting for information on
determining the cause of this condition.
Probable Causes
•
Lubrication
•
Valve lash
•
Valve train components
Recommended Actions
Lubrication
1. Remove the valve mechanism covers. Refer to
Disassembly and Assembly, “Valve Mechanism
Cover - Remove and Install” for the correct
procedure.
2. 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.