C 30 1 Ton Pickup 2WD V8-350 5.7L VIN M 4-bbl (1983)
Oil Cooler: All Technical Service Bulletins
Engine - Loss of Engine Oil Pressure After Oil Change
Number:
84-149
Section:
6B (VI)
Date:
June, 1984
Subject:
POSSIBLE LOSS OF ENGINE OIL PRESSURE FOLLOWING AN OIL CHANGE
Model and Year:
ALL MODEL YEARS TRUCKS/ PASSENGER CARS WITH 5.0L AND 5.7L V8 ENGINES AND KC4 ENGINE OIL
COOLERS
TO:
ALL CHEVROLET DEALERS
Some vehicles equipped with 5.0L and 5.7L V8's and engine oil coolers (RPO KC4) may encounter a "no engine oil pressure" after an oil change or hot
soak. This condition may be caused by trapped air in the oil cooler assembly.
Performing the following steps should eliminate any additional occurrences:
1.
Remove the engine oil filter.
2.
Remove the cooler lines from the cooler adapter assembly.
3.
Remove the two (2) cooler adapter to engine block attaching bolts.
Cooler Adapter - Air Bleed Holes
4.
Drill two (2) 1.6 mm (1/16 in.) air bleed holes in the cooler adapter as shown in the attached graphics.
5.
Clean adapter with a suitable solvent making sure all metal chips are removed.
6.
Reinstall the adapter and torque the attaching bolts to 9 N-m (80 in.lbs.).
NOTICE:
Replace the adapter seal and gasket using the appropriate part number assigned to the engine RPO.
7.
Reinstall the cooler lines and oil filter.
8.
Start engine and check for oil leaks.
Labor Operation Number:
T1111
