Delta 88 V6-3800 3.8L (1988)
Oil Pressure Sender: Customer Interest
Engine - False High Oil Pressure Gage Readings
SUBJECT:
FALSE HIGH OIL PRESSURE GAGE READINGS
1988 VEHICLES EQUIPPED WITH 3.8L
MODELS/YEARS:
LG3 (VIN CODE 3), 3800 LN3 (VIN CODE C),
AND 3.0L LN7 (VIN CODE L) V-6 ENGINES
NUMBER:
88-T-16
DATE:
Dec. 18, 1987
SECTION:
6
Figure 1
Some of the above listed vehicles may exhibit false high oil pressure gage readings during normal engine operation.
This condition may be due to a loss of ground to the oil pressure switch mounted in the oil filter adapter (refer to Figure 1). The condition may be
confirmed and corrected by the following procedure:
1.
Verify that the oil pressure gage is reading high.
NOTICE:
Normal engine oil pressure should be approximately 20 psi at idle in drive, with the engine at operating temperature; and
approximately 45 psi at 2000 E.R.P.M. in park with the engine at operating temperature.
2.
Ground the base of the oil pressure sensor to the negative battery terminal or a known good chassis ground.
3.
If procedure step 2 causes a correction in the pressure gage reading, remove and discard the four (4) bolts that attach the oil filter adapter to the
front cover. Install a new oil filter adapter, gasket part number 25529916 and replace the original bolts with four (4) bolts, part number 25534181.
Torque the new bolts to 17 N-m (12.5 ft.lbs.).
