4 ENGIN E SY M PTOMS DIAGNOSTICS 123
Figure 141 Removing oil cooler
4. Remove the eight bolts (M8 x 20) securing the oil
cooler to the oil cooler ho using. Separate t he o il
cooler from the oil cooler housing.
Figure 142 Checking the oil cooler for internal
leakage
1. Te st plate set
2. Air pressure regulator
3. C oolant port (open)
4. Oil port
5. Pressure test the oil cooler following the
procedure in the Engine Service Manual.Ifa
leak is noticed, replace the oil cooler.
EGES-270-1
Read all safety instructions in the "Safety Information" section of this manual before doing any procedures.
Follow all warnings, cautions, and notes.
© August 2008 Navistar, Inc.
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