CAMPAIGN: IMPROPER SEATED VALVE STEM SEALS

1986 Delta 88 with 3.8L (LG3)

TO: ALL AFFECTED DEALERS:

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 improperly seated valve stem seals.

VEHICLES INVOLVED:

Involved are some 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

All affected vehicles have been identified by the VIN listing provided to involved Dealers with this bulletin. Any Dealer not receiving a listing was not shipped any of the affected vehicles.

DEALER CAMPAIGN RESPONSIBILITY:

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

Whenever a vehicle subject to this campaign is taken into your new or used vehicle inventory, or it is in 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 your new vehicle inventory are to he contacted by the Dealer, and arrangements made to make the required modification according to instructions contained in this bulletin.

CAMPAIGN PROCEDURE:

Refer to Section 4 of the Service Policies and Procedures Manual for the detailed procedure on handling Product Campaigns. Dealers are requested to complete the campaign on all transfers as soon as possible.

OWNER NOTIFICATION:

All owners of record at the time of campaign release are shown on the attached computer listing and have been notified by first class mail from General Motors. The listings provided are for campaign activity only and should not be used for any other purpose.

PARTS INFORMATION:

Parts, if required, should be ordered through regular channels as follows:

Description Part Number Req'd. ----------- ----------- ------ Intake Valve Stem 25530143 * 6/car - See note below Seal

Exhaust Valve Stem 25530142 ** 6/car - See note below Seal

* Part Number 25530143 contains a quantity of six (6) intake valve stem seals. Order only one (1) Part Number 25530143 for each involved vehicle.

** Part Number 25530142 contains one (1) exhaust valve stem seal. Order a quantity of six (6) Part Number 25530142 for each involved vehicle.

PARTS AND LABOUR CLAIM INFORMATION:

Credit for the campaign work performed will be paid upon receipt of a properly completed campaign claim card or RAPID terminal transmission in accordance with the following:

Repair Code Operation Time Allowance ----------- --------- -------------- 2A Replace Intake and 1.7 Exhaust Valve Stem Seals on All Cylinders

Time allowance includes 0.1 hour for Dealer administrative detail associated with this campaign. Parts credit will be based on Dealer net plus 30% to cover parts handling.

SERVICE PROCEDURE:

- 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.

- 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 C31 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.

- 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 through 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.

INSTALLATION OF CAMPAIGN IDENTIFICATION LABEL

Clean surface of radiator to upper mounting panel and apply a Campaign Identification Label. Make sure the correct campaign number is inserted on the label. This will indicate that the campaign has been completed.

Dear General Motors Customer:

General Motors of Canada has determined that some 1986 Delta 88 models were produced with 3.8L (V6) engines which may experience excessive oil consumption due to improperly seated valve stems.

In order to correct this condition, Dealers will replace all intake and exhaust stem seals.

Please arrange an appointment with your GM Dealer to have this modification performed.

This letter identifies your vehicle. Presentation of this letter to your Dealer will assist their Service personnel in completing the necessary correction t o your vehicle in the shortest possible time.

Further assistance, if required, may be obtained from the General Motors Zone Office nearest you. Your vehicle Owner's Manual provides the location and phone number of each respective Zone Office.

We are sorry to cause you this inconvenience; however, we have taken this action in the interest of your continued satisfaction with our products.

Technical Services Department General Motors of Canada Limited

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.