Monte Carlo V6-260 4.3L DSL (1983)
Valve Cover Gasket: Technical Service Bulletins
Diesel Engine Valve Cover - Sealing
Number:
83-I-68
Section:
VI
Date:
May, 1983
Subject:
1983 ENGINE VALVE COVER SEALING - 4.3L DIESEL ENGTNE (VIN CODE V & T) 5.7L DIESEL ENGINE (VIN CODE N)
TO:
ALL CHEVROLET DEALERS
FORCING SCREW/TABS
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 heat-
ing and cooling cycles without breaking the RTV sealing bead. To
obtain this space, the V8 diesel engine valve covers use "coined
in place" spacers and the V6 diesel engine valve covers use sep-
arate snap in place clips. Chevrolet is currently using a black
RTV sealer for valve cover to cylinder head sealing. This RTV
has improved adhesion characteristics. Valve cover removal may
be eased by the use of a valve cover removal tool such as
Borroughs BT8315 (see illustration below) 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 mallot. The board and cloth will absorb the blow of
the mallot without denting the valve cover, while loosening the RTV bead and allowing valve cover removal.