MOANING NOISE AFTER START REPLACE OIL PAN AND OIL PUMP. Cadillac Limousine 1986

For 1990-2009 cars

# MOANING NOISE AFTER START REPLACE OIL PAN AND OIL PUMP

#### MODELS AFFECTED: 1985-1988 DE VILLES AND FLEETWOODS 1986-1988 ELDORADOS AND SEVILLES 1987-1988 ALLANTES

Some 1985-1988 DeVilles and Fleetwoods, 1986-1988 Eldorados and Sevilles, and 1987-1988 Allantes may experience a low moaning noise after cold engine start not unlike the noise associated with a dry power steering pump. The noise is caused by vibration of the oil pump pickup and can be repaired by replacing the oil pump assembly (pickup replacement is not possible since it is staked into the pump during manufacturing). New pumps with a revised configuration of the pickup are available by ordering:

o P/N 3517753 for 1985-1989 C, E, K o P/N 3517754 for 1987-1989 V

These new pumps will supersede the previously released parts.

Parts are expected to be available on December 5, 1988. Until then, normal part orders will not be accepted by GMSPO. Only verifiable emergency VIP orders will be accepted. SPO will make every effort to obtain parts. All parts will be placed on 400 control to waive VIP surcharges. However, the part will be shipped premium transportation at dealer's expense. All other order types will be cancelled as incorrectly ordered while the 400 control is in place.

#### Service for 1985-1987 C, E, K Vehicles

The revised pump can be used to directly replace the previous design. No modifications are required.

#### Service for 1988 C, E, K, and 1987-1988 V Vehicles

Since these engine oil pans incorporate a baffle specifically shaped to accommodate the oil pump pickup, the revised pickup configuration will not be compatible. On these vehicles, the oil pan must also be replaced.

o P/N 1649382 for C, E, K o P/N 1649126 for V

1989 production cars use these quieter oil pumps and the appropriately baffled oil pans. For warranty purposes use Labor Operation J1020 at 1.4 hours for C-Cars, 1.5 hours for E and K-Cars, or 1.9 hours for V-Cars.

General Motors bulletins are intended for use by professional technicians, not a "do-it-yourselfer". They are written to inform those technicians of conditions that may occur on some vehicles, or to provide information that could assist in the proper service of a vehicle. Properly trained technicians have the equipment, tools, safety instructions and know-how to do a job properly and safely. If a condition is described, do not assume that the bulletin applies to your vehicle, or that your vehicle will have that condition. See a General Motors dealer servicing your brand of General Motors vehicle for information on whether your vehicle may benefit from the information.