Technical Procedure
Engine Front (Left) Bank1. 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 C(3)I 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 C(3)I 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 ft.lbs.).
29. Reinstall remaining components by reversing removal procedures. Valve cover nuts should be tightened to 10 N-m (88 in.lbs.).
30. Check engine oil level and add, if necessary.
31. Start engine. Check for proper engine operation and valve cover oil leaks.
CAMPAIGN IDENTIFICATION LABEL:
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.