Corsica V6-173 2.8L (1987)
Oil Pressure Sender: All Technical Service Bulletins
Engine - Correct Oil Pressure Readings
Number:
88-114-6
Section:
6
Date:
Jan., 1988
Subject: CORRECT OIL PRESSURE READINGS, 2.8L V-6 ENGINES
Model and Year: ALL PASSENGER CARS
WITH 2.8L V-6 ENGINES
TO:
ALL CHEVROLET DEALERS
Comments have been received on perceived low oil pressure at idle with the above engine. The minimum oil pressure at hot idle with this engine should
be 6 Psi (Pounds Per Square Inch).
The dash gauge should never be used as a final reading on any engine. An external gauge should always be used. This gauge should have a full scale
reading of no more than 60 PSI, and should be checked regularly for accuracy.
1.
On Cavalier and Celebrity models with instrument clusters having both a gauge and a warning light, the warning light may flicker at idle. If this
condition is found, replace the sender with P/N 10068576.
2.
On cars with standard warning lights, the light may flicker at idle. If the external gauge check above indicates sufficient pressure at idle,
replacement of the oil pressure switch should correct the condition.
3.
On cars with standard analog gauges, the needle may just touch the red band of the gauge at idle. If the external gauge check above indicates
sufficent pressure at idle, the customer should be informed that this condition is normal, as long as the pressure goes up immediately when engine
RPM is increased.
It is acceptable for an engine that is hot to read as low as 6 PSI at idle. The oil reading should go up immediately when RPM is increased. Only when oil
pressure is below 6 PSI at idle, or stays low at higher engine RPM, should engine repairs be attempted.
