Vanden Plas L6-4.0L (1990)
Oil Pump: Technical Service Bulletins
Oil Sump - Pressure Relief Valve Access Plug Deleted
OIL SUMP/PRESSURE
SECTION: 12
RELIEF VALVE
No: 18
Model:
90 MY SEDAN RANGE Date: APRIL, 1990
KEY POINTS:
OIL SUMP MODIFICATION
Beginning with VIN 607811 (Engine Number 9EPCLA112736), the oil pressure relief valve access plug has been deleted from the oil sump on 1990
MY Sedan Range vehicles.
The oil sump must be removed to gain access to the oil pressure relief valve on engines incorporating this change. To remove the sump, refer to section
12.60.38 of the 4.0 Sedan Service Manual.
WARRANTY INFORMATION:
Fault Code:
1EB
Repair Operation Number:
12.60.56
Time Allowance:
For vehicles below VIN 607811 - 0.45 hrs. For vehicles from VIN 607811 onward - 5.10 hrs.