LeSabre Estate Wagon V8-307 5.0L (1983)
Valve Cover: Technical Service Bulletins
Engine Valve Cover - Sealing
Model Year 1983
Bulletin No. 83-114
File In Group 60
Number
27
Date
May '83
SUBJECT:
ENGINE VALVE COVER SEALING - 4.3L DIESEL ENGINE (VIN CODE V & T) 5.7L DIESEL ENGINE (VIN CODE N) 5.0L GAS ENGINE (VIN CODE Y & 9)
FIGURE 1 - BORROUGHS BT8315
Engine valve covers for subject engines are being manufactured with spacers to hold them away from the cylinder head. This space allows the valve
cover to expand and contract during heating and cooling cycles without breaking the RTV sealing bead. To obtain this space the V8 gas and diesel
engine valve covers use "coined in place" spacers and the V6 diesel engine valve covers use separate snap in place clips. A black RTV sealer for valve
cover to cylinder head sealing is currently being used on these engines in production. This RTV has improved adhesion characteristics. Valve cover
removal may be eased by the use of a valve cover removal tool such as Burroughs BT8315 (Figure 1) or equivalent. To use the tool, remove the valve
cover bolts and position tool on the inboard (inside) edge of the valve cover, midway between valve cover ends. Engage remover tool tabs under valve
cover flange and tighten forcing screw against the intake manifold. As the forcing screw is tightened watch the valve cover flange. If the flange begins to
bow, stop. Leave the tool in place. Wrap a cloth around a short board. Place the cloth wrapped board parallel to and against the side of the valve cover
above the tool. Strike the board with a mallet. The board and cloth will absorb the blow of the mallet without denting the valve cover, while loosening
the RTV bead and allowing valve cover removal.
