Skylark L4-138 2.3L DOHC VIN D MFI (1988)
Oil Pick Up/Strainer: All Technical Service Bulletins
Engine - No/Low Engine Oil Pressure After Startup
Bulletin:
88-6-32
Date:
Apr. '90
Ref. No.: 88-296-6
Corp. Ref. No.: 076101
SUBJECT:
NO/LOW ENGINE OIL PRESSURE AFTER STARTUP, COLD ENGINE, TEMPERATURE BELOW FREEZING - DRILL SCREEN
ASSEMBLY
MODELS AFFECTED: 1988 SKYLARKS WITH 2.3L ENGINE (VIN CODE D)
CONDITION:
Some 1988 Skylarks equipped with a 2.3L Quad 4 engine may experience a momentary no or low oil pressure condition when first started after a cold
soak at or below freezing.
CAUSE:
This condition can result from condensed crankcase water vapor icing over the bottom of the oil pump screen assembly.
CORRECTION:
To correct this condition, a 1/4 inch hole can be drilled into the side of the screen assembly pick up as described in the following service procedure. This
hole will allow oil to be drawn into the oil pump should the bottom of the screen assembly ice over.
SERVICE PROCEDURE:
Refer to Section 6A7, in the 1988 Skylark Service Manual when performing the following service procedure.
1.
Drain engine oil and remove oil pan.
2.
Remove two (2) screws attaching screen assembly to oil pump and one (1) nut attaching screen assembly to block.
3.
Remove screen assembly and thoroughly wash off all oil and dry.
Figure 1
4.
Locate and mark position for 1/4 inch hole to be drilled on side of screen assembly pick up. Refer to Figure 1.
5.
Clamp screen assembly pipe in a bench vise being careful not to bend or distort the pipe.
6.
Drill a 1/8 inch pilot hole at location marked in Step 4. After drilling pilot hole, use a 1/4 inch drill bit and drill hole to 1/4 inch.
7.
After drilling, thoroughly deburr hole.
IMPORTANT
8.
COMPLETELY REMOVE ANY METAL SHAVINGS FROM SCREEN ASSEMBLY AND THOROUGHLY WASH OUT ASSEMBLY WITH
CLEAN SOLVENT.
