TROUBLESHOOTING
TESTING AND ADJUSTING
21. TOO MUCH WHITE OR BLUE SMOKE
Cause
Correction
Too Much Lubrication Oil in Engine
Remove extra oil. Find where extra oil comes from. Put correct
amount of oil in engine. Do not put too much oil in engine.
Misfiring or Running Rough
Make Reference to Item 3.
Wrong Fuel Injection Timing
Make adjustment to timing.
Worn Valve Guides
Reconditioning of cylinder head is needed.
Worn Piston Rings
Install new piston rings.
Failure of Turbocharger Oil Seal
Check inlet manifold for oil and make repair to turbocharger if
necessary.
22. ENGINE HAS LOW OIL PRESSURE
Cause
Correction
Defect in Oil Pressure Gauge
Install new gauge.
Dirty Oil Filter or Oil Cooler
Check the operation of bypass valve for the filter. Install new oil filter
elements if needed. Clean or install new oil cooler core. Remove dirty
oil from engine. Put clean oil in engine.
Diesel Fuel in Lubrication Oil
Find the place where diesel fuel gets into the lubrication oil. Make
repairs as needed. Remove the lubrication oil that has diesel fuel in it.
Install a new oil filter element. Put clean oil in the engine.
Too Much Clearance Between
Check lubrication in valve compartment. Install new parts as
Rocker Arm Shaft and Rocker Arms
necessary.
Oil Pump Suction Pipe Has A Defect
Replacement of pipe is needed.
Relief Valve for Oil Pump Does Not
Clean valve and housing. Install new parts as necessary.
Operate Correctly
Oil Pump Has a Defect
Make repair or replacement of oil pump if necessary.
Too Much Clearance Between Cam-
Install new camshaft and camshaft bearings if necessary.
shaft and Camshaft Bearings
Too Much Clearance Between
Check the oil filter for correct operation. Install new parts if
Crankshaft and Crankshaft Bear-
necessary.
ings
Too Much Bearing Clearance for
Inspect bearings and make replacement as necessary.
Idler Gear
Orifices For Piston Cooling Not In-
Install piston cooling orifices.
stalled
