Engine Oil In Cooling System - Perkins M190C Troubleshooting Manual

KENR9126
1. Use the electronic service tool to select the
correct screen display. Refer to Troubleshooting,
"Troubleshooting with a Diagnostic Code".
2. If the fault is not eliminated, refer to "Low
Compression (Cylinder Pressure)".
Low Compression (Cylinder Pressure)
1. Perform a compression test.
2. If low compression is noted on any cylinders,
investigate the cause and rectify the cause.
Possible causes of low compression are shown
in the following list:
• Loose glow plugs
•
Faulty piston
• Faulty piston rings
• Worn cylinder bores
•
Worn valves
• Faulty cylinder head gasket
• Damaged cylinder head
3. Perform all necessary repairs.
4. Ensure that the repairs have eliminated the faults.
5. If the repair does not eliminate the fault refer to
"Individual Malfunctioning Cylinders".
Individual Malfunctioning Cylinders
1. With the engine speed at a fast idle, use the
electronic service tool to isolate one cylinder at
a time. Note if there is any reduction in engine
speed. If a reduction in engine speed is not noted,
the isolated cylinder is not operating under normal
conditions. If the isolation of a particular cylinder
results in a reduction of engine speed that is less
than normal. The reduction in engine speed may
indicate that the cylinder is operating below normal
performance. Investigate the cause of the fault on
any cylinder that is not operating. Investigate the
cause of the fault on any cylinder that is operating
below normal performance.
2. Rectify any faults.
3. If all cylinders have been checked and no there
was no problems with the cylinders, proceed to
"Electronic Unit Injectors".
Electronic Unit Injectors
1. With the engine speed at a fast idle, use the
electronic service tool to isolate one cylinder at
a time. Note if there is any reduction in engine
speed. If a reduction in engine speed is not noted,
the isolated electronic unit injector is not operating
under normal conditions. If the isolation of a
particular cylinder results in a reduction of engine
speed that is less than normal, this may indicate
that the electronic unit injector is operating below
normal performance.
2. Remove the electronic unit injector from the
suspect cylinder.
3. Install a new electronic unit injector.
4. Repeat the test in 1. If the fault is still apparent,
remove the replacement electronic unit injector
and install the original electronic unit injector.
5. If the fault is not eliminated, check for active
diagnostic fault codes.

Engine Oil in Cooling System

Note: This is not an electronic system fault.
Probable Causes
• Engine oil cooler
• Cylinder head gasket
• Cylinder head
• Cylinder block
Recommended Actions
Engine Oil Cooler
1. Drain the coolant from the engine and the radiator.
Drain the lubricating oil from the engine oil cooler.
2. Check for leaks in the oil cooler assembly. If a leak
is found, install a new oil cooler.
Cylinder Head Gasket
1. Remove the cylinder head.
2. Inspect the cylinder head gasket for faults and any
signs of leakage.
3. If necessary, install a new cylinder head gasket.
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Troubleshooting Section
i04010453