Oil Pressure Regulator Inspection; Oil And Crankcase Inspection - Navistar International DT 466 Diagnostic/Troubleshooting Manual

• If mechanical gauge and EST read values
with a difference greater than +/- 14 kPa (+/-2
psi), perform Electronic Control Systems
Diagnostics for the EOP circuit as described
in Section 7 in this Manual.
• If instrument panel engine oil pressure gauge
reads a different value than the EST and
mechanical gauge refer to the Electrical
System Troubleshooting Guide for the model
and year of vehicle.

Oil Pressure Regulator Inspection

Figure 151 Oil pressure regulator
1. Remove and inspect oil pressure regulator as
described in the Engine Service Manual.
• The oil pressure regulator piston should move
freely in its bore.
• If oil pressure regulator is functional and
passes inspection, install regulator following
the procedure in the Engine Service Manual.
Go to "Oil and Crankcase Inspection" (page
129) in this section.
Read all safety instructions in the "Safety Information" section of this manual before doing any procedures.
4 ENGINE SYMPTOMS DIAGNOSTICS
EGES-270-1
Follow all warnings, cautions, and notes.
© August 2008 Navistar, Inc.

Oil and Crankcase Inspection

1. Drain oil from engine.
magnet, drained oil and oil filter for foreign debris.
• An oil sample should be taken to determine
level of engine wear metals and contaminants
in the oil.
Figure 152 Bottom of engine
Figure 153 Oil pickup tube assembly and gasket
1. Oil pickup tube assembly
2. Gasket
129
Inspect oil drain plug