CAMPAIGN: IMPROPER SEATED VALVE STEM SEALS

MODELS AFFECTED: 1986 FRONT WHEEL DRIVE (FWD) LESABRES EQUIPPED WITH 3.8L (VIN CODE 3) ENGINE

CONDITION

Some 1986 front wheel drive LeSabres produced with a 3.8L V-6 (VIN Code 3) engine may experience excessive oil consumption due to improperly seated valve stem seals.

DEALER ACTION

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

DEALER CAMPAIGN RESPONSIBILITY

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 your 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.

VEHICLES INVOLVED

Involved are certain 1986 front wheel drive LeSabres equipped witb a 3.8L LG3 (VIN Code 3) engine within the following VIN breakpoints:

Assembly Plant Beginning Up To and Including -------------- --------- ------------------- Flint GH494511 GH494733

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(s) 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 MATERIAL

If your dealership has vehicles involved in this campaign, you will receive the following items:

o Listing of all vehicles involved in this campaign shipped to your dealership.

o One (1) Campaign Identification Label per vehicle involved.

o One (1) Special Tool BT-6413M (required for performing Technical Procedure).

Involved vehicles have been identified by Vehicle Identification Number computer listings. Computer listings contain the complete vehicle identification number, owner name and address data, and are furnished to the involved dealers with the campaign bulletin. Owner name and address data will enable dealers to follow-up with owners involved in this campaign.

These computer listings may contain owner names and addresses obtained from State Motor Vehicle Registration Records. The use of such motor vehicle registration data for any other purpose is a violation of law in several states. Accordingly, you are urged to limit the use of this listing to the follow-up necessary to complete this campaign.

OWNER NOTIFICATION

Owners of vehicles involved in this campaign will be notified by Buick Motor Division (see copy of letter included with this bulletin).

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.D. order, with NO special instruction code, but order on an advise code (2).

Description Part Number ----------- ----------- Intake Valve Stem Seal Kit 25518390* Exhaust Valve Stem Seal 25522001**

* Part No. 25518390 contains a quantity of six (6) intake valve stem seals. Order only one (1) Part No. 25518390 for each involved vehicle.

** Part No. 25522001 contains one (1) exhaust valve stem seal. Order a quantity of six (6) Part No. 25522001 for each involved vehicle.

In the unlikely event that valve cover gasket replacement is necessary, replace with Part No. 25518526. This package contains two (2) valve cover gaskets.

TECHNICAL 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 plug.

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 C3, 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 C3, 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-6413M or equivalent at the same location as the valve's pedestal retaining bolt (Tool BT-6413M with "T" bolt furnished by Buick).

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-6413M and J-23590, or equivalents.

26. Install spark plug.

27. Repeat Steps 17 and 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 lb. ft).

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

DISPOSITION OF PARTS

Replaced parts must be held for disposition by Buick contact personnel. Parts must have a claim tag attached showing the repair order and the VIN of the vehicle from which they were removed.

WARRANTY INFORMATION

SUBLET PART FAILED PARTS FAILURE LABOR LABOR OTHER DEALER OPERATION COUNT PART NO. ALLOW. CODE OP NO HOURS HOURS MTL TWG

Replace Intake & Exhaust Valve Stem Seals On All Cylinders. * ++ +++ 96 V3750 1.6 ++++ -- .1

* Number of Parts Replaced. ++ Part No. of Intake Valve Seal Kit. +++ Current Dealer price, plus 30% of all replaced parts. ++++ .1 hour for Administration.

Dear Buick Owner.

Some 1986 front wheel drive LeSabres produced with a 3.8L V-6 engine may experience excessive oil consumption due to improperly seated valve stem seals.

To correct this condition, your Buick dealer will replace the engine's intake and exhaust valve stem seals. This service will be performed at no charge to you.

Instructions for making this correction have been sent to your dealer. Please contact your dealer to arrange a service date. The time required to perform this service is about one hour and 45 minutes. Please ask your dealer if you wish to know how much additional time will be necessary to process your vehicle.

The enclosed owner reply card identifies your vehicle. Presentation of this card to your dealer will assist in making the necessary correction in the shortest time. If you have sold or traded your vehicle, please let us know by completing the postage-paid owner reply card and returning it to us.

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

BUICK MOTOR DIVISION General Motors Corporation

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.