CAMPAIGN: IMPROPER SEATED VALVE STEM SEALS

CONDITION

Some 1986 Oldsmobile Delta 88 models produced with a 3.8L V-6 (VIN Code 3) engine may experience excessive oil consumption due to imporperly seated valve stem seals.

VEHICLES INVOLVED

Involved are certain 1986 Oldsmobile Delta 88 models equipped with a 3.8L LG3 (VIN Code 3) engine within the following VIN breakpoints:

Assembly Plant Beginning Up To And Including -------------- --------- ------------------- Willow Run (W) GW444390 GW453615

Vehicles involved in this campaign have an engine timing chain (front) cover which is not painted. If the cover is painted, the vehicle is not involved.

All vehicles listed on the dealer printout will require correction. Should a question exist concerning the campaign involvement of a specific vehicle within the breakpoints listed above that does not appear on the dealer printout, dealers should call the Computerized Recall Information System (C.R.I.S.) for verification.

DEALER ACTION

To correct this condition on vehicles involved, dealers are to replace all intake and exhaust valve stem seals as directed in the service procedure section of this bulletin.

Dealers are to service all vehicles subject to this campaign at no charge to the owner, regardless of mileage, age of vehicle, or ownership, from this time forward.

Whenever a vehicle subject to this campaign is taken into your dealership for service in the future, you should take the steps necessary to be sure the campaign correction has been made before reselling or releasing the vehicle.

Owners of vehicles recently sold from you new vehicle inventory are to be contacted by the dealer and arrangements made to make the required correction according to instructions contained in this bulletin.

SERVICE PROCEDURE

o Engine Front (Left) Bank

1. Install fender covers and disconnect negative battery cable.

2. Disconnect crankcase ventilation pipe.

3. Remove spark plug wire harness cover.

4. Remove spark plug wires from spark plugs.

5. Remove valve cover nuts, washers and seals.

6. Remove valve cover with gasket. Do not remove gasket from cover. Gaskets can be reused if not damaged.

o Engine Rear (Right) Bank

7. Remove the C3I ignition coil module assembly as follows:

a. Remove spark plug wires from coil assembly b. Remove harness wiring connector c. Remove EGR solenoid wiring and vacuum hoses d. Remove mounting nuts

8. Remove spark plug wires from spark plugs.

9. Remove serpentine belt tensioner brace.

10. Remove heater water flow control valve (pipe) retaining nuts and C3I ignition coil module assembly.

11. Remove the power steering gear outlet hose clamp.

12. Remove valve cover nuts, washer, and seals.

13. Remove valve cover with gasket. Do not remove gasket from cover. Gaskets can be reused if not damaged.

o Front and Rear Engine Banks

14. Remove rocker arm pedestal retaining bolts.

15. Remove pedestal and rocker arm assemblies. IMPORTANT - Note the position of the double ended bolts for reassembly. - Place assemblies on a clean surface. - Keep components in order so that they can be reassembled in the same location.

16. Remove spark plugs.

17. Install spark plug port adapter tool J 23590 or equivalent into a spark plug hole and charge cylinder with compressed air to hold valves closed.

18. Using correct length 3/8 x 16 bolt and washer, install valve spring compressor tool BT-6413 or equivalent at the same location as the valve's pedestal retaining bolt.

19. Compress the valve spring, remove valve stem keys.

20. Remove valve spring and retainer.

21. Remove the valve stem seal from the guide.

22. Install and fully seat new valve stem seal on to the guide. (Refer to the Parts Information Section of this bulletin for correct part number application.)

23. Install valve spring.

24. Install valve spring retainer, compress the spring and install the valve stem keys.

25. Remove tools BT-6413 and J 23590 or equivalents.

26. Install spark plug.

27. Repeat steps 17 throught 26 for each remaining valve stem seal.

28. Install pedestal and rocker arm assemblies in their original locations. Tighten rocker arm pedestal retaining bolts to 60 N.m (45 lbs. ft.)

29. Reinstall remaining components by reversing removal procedures. Valve cover nuts should be tightened to 10 N.m (88 lbs. in.).

30. Check engine oil level and add if necessary.

31. Start engine. Check for proper engine operation and valve cover oil leaks.

32. Install campaign identification label.

CAMPAIGN IDENTIFICATION LABEL INSTALLATION

Each vehicle modified in accordance with the instructions outlined in this procedure will require a Campaign Identification Label. Each label provides a space to include the campaign number, the five (5) digit dealer code of the dealer performing the campaign service, and the date the vehicle was campaigned. This information may be inserted with a typewriter or ballpoint pen. When installing label, clean the surface of the radiator upper mounting support and apply the campaign label where it is readily visible.

PARTS INFORMATION

Parts for this campaign are to be obtained from Service Parts Operations of General Motors (SPO).

To ensure that parts will be obtained as soon as possible, they should be ordered from SPO on a C.I.O. order with NO special instruction code, but order on an advise code (2). Description Part Number

Intake Valve Stem 25518390* Seal

Exhaust Valve Stem 25522001** Seal

* Part number 25518390 contains a quantity of six (6) intake valve stem seals. Order only one (1) part number 25518390 for each involved vehicle.

** Part number 25522001 contains one (1) exhaust valve stem seal. Order a quantity of six (6) part number 25522001 for each involved vehicle.

In the unlikely event that valve cover gasket replacement is necessary, replace with part number 25518526. This package contains two (2) valve cover gaskets.

CLAIM INFORMATION

Description Code Operation Hours ----------- ------- --------- ----- Replace Intake and 96 V3750 1.6 Exhaust Valve Stem Seals on All Cylinders

.1 hour for clerical administration may be added to the above operation.

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.