Service Procedure

1. Place car on hoist. Open and prop hood. Install fender covers on both fenders.

2. CAUTION: To reduce the risk of fire and personal injury, it is necssnary to relieve fuel system pressure before servicing fuel system components. To do this:

Remove "Fuel Pump" fuse (25 amp. at position No. 12) from fuse block in passenger compartment.

Crank engine. Engine will start and run untit fuel supply remaining in fuel lines has been consumed. Engage starter for three (3) seconds to assure relief of any remaining procedure.
Unless this procedure is followed before servicing fuel lines or, connections, fuel spray could occur.

3. Disconnect negative cable at battery.

4. At air cleaner, disconnect hoses and-electrical connector to Manifold Absolute Pressure (MAP) sensor. Remove air cleaner and air inlet hose.

5. Disconnect electrical connectors at Manifold Air Temperature (MAT) sensor and at lower throttle body. Move the wiring harness back toward the cowl.

Do NOT remove the connector to the injector in the top of the throttle body.

6. Using a 19 mm extended socket, remove the MAT sensor and set aside for later reinstallation.



7. Loosen mounting bolts of power steering pump to provide clearance when the fuel lines are removed and replaced later. It is not necessary to remove the pump from the engine.

8. Unbolt clips (3) and (4) which retain the Fuel Feed and Return Hose/Pipe Assemblies to the top side of the engine (see illustration). Save the bolts and clamps for reuse.

9. Disconnect the Fuel Feed and Return Hose/Pipe Assembly fittings at the throttle body and at the chassis lines. Refer to illustration. Use a backup wrench while loosening fittings.

10. Hoist vehicles. Unbolt clip (6) from underside of intake manifold. Unscrew clip (14) from bracket which is bolted on the push rod cover. Save clips and bolts/screws for reuse.

11. Lower vehicle.

12. Remove both the Fuel Feed and Return Hose/Pipe Assemblies, moving power steering pump as required for clearance.

13. Examine the fittings on the hose/pipe assemblies and the chassis pipes for, mining or damaged O-rings. If O-rings need replacing, use part numbers indicated In the Parts Information section.

14. Thread now Fuel Feed Hose/Pipe Assembly (part: number 10101301) from area of power steering pump under the intake manifold and over the lift bracket, (9) in illustration:

At the lift bracket, the fuel hose must pass UNDER the spark plug wires, UNDER the wire to coolant temperature sensor, and UNDER the engine wiring harness (harness to starter and cooling fan).

In the area under the intake manifold, the fuel pipe must pass above all hoses and wires.

Move the power steering pump as necessary to permit connecting the fuel pipe to throttle body fitting.

15. Repeat step 14 with the new Fuel Return Hose/Pipe Assembly (Part Number 10101315).

16. Install the pipe fittings to the throttle body and the chassis pipes finger tight. Do not torque this time.

17. Loosely install clip (4) and screw (5) at lift bracket (9) as shown in illustration.

Loosely install clip (3) and bolt (13) as shown in illustration.


18. Raise the vehicle and reinstall clip (6) as shown in illustration; torque bolt (7) to 27 N-m (20 ft.lbs.).

Reinstall clip (14) as shown in illustration; torque screw (15) securely.

19. Lower the vehicle and torque crew (5) to 10 N-m (90 in.lbs.). Torque bolt (13) securely.

20. Torque the pipe fittings at the throttle body to 27 N-m (20 ft.lbs.). Use a backup wrench.

21. Torque the hose fittings to the chassis fuel pipes at 27 N-m (20 ft.lbs.). Use a backup wrench and take care not to twist the hoses.
22. Inspect both hose/pipe assemblies to assure the following conditions:

^ They MUST clear the shift lever on the transaxle by at least 10 mm (3/8 inch) in every gear position.

^They do not contact the transaxle Fluid Level Indicator.

^ They do not contact the brake pipes.

The chassis fuel pipes should be vertical at the engine compartment rail.
23. Refer to the 1987 Oldsmobile (Calais) Chassis Service Manual, Volume 1, and torque the power steering pump mounting bolts as shown on page 3B3-6. Adjust belt tension per chart on page OA-17.

24. Reinstall the MAT sensor.

25. Reinstall the electrical connectors at the MAT sensor and lower throttle body.

26. Reinstall air cleaner and air inlet hose. Reinstall electrical connector to MAP and hoses to air cleaner.


27. Reconnect negative cable at battery.


28. Reinstall the "Fuel Pump" fuse.

29. Start the engine and check the fuel hose/pipe fittings at the chassis lines and the throttle body for leaks.

30. Turn off engine and install a campaign label.

31. Remove fender covers and close hood.