User Manual

44 SENR9977
Testing and Adjusting Section
g00985780
Illustration 51
Clearance for the inner rotor
(2) Meas ure the clearance of the inner rotor to the outer rotor.
4. Measure the clearance of the inner rotor to the
outer rotor (2).
g00989217
Illustration 52
5. Measure the end play of the rotor with a straight
edge and a feeler gauge (3).
6. Clean the top face of the oil pump and the bottom
face of the cover. Install the cover on the oil
pump. Install the oil pump on the engine. Refer to
Disassembly and Assembly, “Engine Oil Pump -
Install”.
i01126690
Excessive B earing Wear -
Inspect
When some comp
onents of the engine show bearing
wear in a short time, the cause can be a restriction in
an oil passage.
An engine oil pressure indicator may show that there
is enough oil pressure, but a component is worn
due to a lack o
f lubrication. In such a case, look at
the passage for the oil supply to the component.
A restriction in an oil supply passage will not allow
enough lubri
cation to reach a component. This will
result in early wear .
i01794028
Excessive Engine Oil
Consumption - Inspect
Engine Oil Leaks on the Outside of
the Engine
Check for leakage at the seals at each end of the
crankshaft. Look for leakage at the gasket for the
engine oil pan and all lubrication system connections.
Look for any engine oil that may be leaking from
the crankcase breather. This can be caused by
combustion gas leakage around the pistons. A dirty
crankcase breather will cause high pressure in the
crankcase. A dirty crankcase breather will cause the
gaskets and the seals to leak.
Engine Oil Leaks into the
Combustion Area of the Cylinders
Engine oil that is leaking into the combustion area of
thecylinderscanbethecauseofbluesmoke.There
are several possible ways for engine oil to leak into
the combustion area of the cylinders:
•
Leaks between worn valve guides and valve stems
•
Worn components or damaged components
(pistons, piston rings, or dirty return holes for the
engine oil)
•
Incorrect installation of the compression ring and/or
the intermediate ring
•
Leaks past the seal rings in the turbocharger shaft