TROUBLESHOOTING
TESTING AND ADJUSTING 25. ENGINE HAS LOW OIL PRESSURE Cause:
Correction:
Dirty Oil Filters or Oil Cooler
Check the operation of bypass valve for the filter. Install new oil filters 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 new oil filters. Put clean oil in the engine.
Too Much Clearance Between Rocker Arm Shaft and Rocker Arms
Check lubrication in valve compartments. Install new parts as necessary.
Oil Pump Suction Pipe Has A Defect
Replacement of pipe is needed.
Oil Pressure Relief Does Not Close
Clean valve and housing. necessary.
Oil Pump Has A Defect
Repair or replace oil pump.
Too Much Clearance Between Crankshaft and Crankshaft Bearings
Inspect the bearings and make replacement as necessary.
Too Much Clearance Between Camshaft and Camshaft Bearings
Install new camshaft and camshaft bearings if necessary.
Defect in Oil Pressure Gauge
Install new gauge.
Install new parts as
26. ENGINE USES TOO MUCH LUBRICATION OIL 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.
Oil Leaks
Find all oil leaks. Make repairs as needed. Check for dirty crankcase breather.
Oil Temperature is Too High
Check operation of oil cooler. Install new parts if necessary. Clean the core of the oil cooler.
Too Much Oil in the Valve Compartment
Be sure that the dowel is installed in the left bolt hole of the rocker shaft. The dowel is located between the rocker shaft and valve cover base.
Worn Valve Guides
Reconditioning of the cylinder head is needed.
Worn Piston Rings
Inspect and install new parts as needed.
Failure of Seal Rings in Turbocharger
Check inlet manifold for oil and make repairs to the turbocharger if necessary.
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