Storm L4-1600cc 1.6L SOHC (1990)
Engine Oil Pressure: Technical Service Bulletins
Engine - Updated Oil Pressure Check
Number:
90-245-6
Section:
6
Date:
May 1990
Corporate Bulletin No.: 036002
Subject:
ENGINE OIL PRESSURE CHECK
Model and Year:
1990 R CAR
TO:
ALL CHEVROLET DEALERS
This bulletin is an addition to Section 6 of the 1990 GEO Storm Service Manual.
1.
Check the engine oil level. Oil should be visible on the dipstick between the "ADD" and the "FULL" marks. If oil is not visible past the "ADD"
mark, add API Service SG SAE 5W-30 (SOHC) or API Service SG SAE 10W-30 (DOHC) engine oil until oil is visible on the dipstick past the
"ADD" mark.
2.
Remove the oil pressure sending unit. The sending unit is located on the right-hand side of the engine block, just left of the starter.
3.
Screw a J 25695-10 adapter into the engine block where the oil pressure sending unit was removed. Install a J 21867 Pressure Gage to the adapter.
4.
Start and run the engine until operating temperature is attained.
5.
Increase engine speed to 3,000 RPM and measure oil pressure. Oil pressure should be 300 to 500 kPa (43.5 to 72.5 psi) at 3,000 RPM (SOHC) or
350 to 550 kPa (51.2 to 80.4 psi) at 3,000 RPM (DOHC).
6.
Stop the engine.
7.
If oil pressure does not fall within the above specified limits, refer to "Low Oil Pressure" in this section for further diagnostic information.
8.
Remove the J 21867 Pressure Gage and the J 25695-10 adapter from the engine block.
9.
Install the oil pressure sending unit.
10.
Restart the engine and check for oil leaks.