DeVille V8-252 4.1L VIN 8 FI (1983)
Intake Manifold Gasket: Technical Service Bulletins
Engine - New Design Intake Manifold Gaskets
Bulletin No.
T-89-42
File in Group
6A
Number
101
Corp. Ref. No.
816110
Date
Dec. 1988
SUBJECT:
REVISED INTAKE MANIFOLD GASKETS
MODELS AFFECTED: 1985-1988 DE VILLES AND FLEETWOODS 1982-1985 RWD DE VILLES AND BROUGHAMS 1982-1988
ELDORADOS AND SEVILLES 1987-1988 ALLANTES
Continuous development at Cadillac has resulted in an improved intake manifold gasket sealing system available now from GMSPO superseding the
originally released gaskets. The sealing system is an engineered combination of components working together, and depending upon each other, to
provide a durable, effective seal. The key components of the system are:
^
New intake manifold side gaskets made of a graphite (rather than asbestos) based material.
^
New manifold end seals with a grid of "suction cups" to aid sealability.
^
New intake manifold attaching bolts with captured Belleville spring washers.
^
Previously released solid cylinder head dowel pins, refer to Bulletin T-86-41.
Resealing Gasket Kits
These components have been assembled into a series of kits called "Intake Manifold Resealing Gasket Kits" with applications for all 1982-1988 4.1L
and 4.5L V-8 engines.
P/N
Application
3634741
1982-1983 C, E, K
3634742
1984 C, 1985 D, E, K
3634743
1985 C (FWD)
3634744
1986-1987 C, E, K
3634745
1987-1988 V
3634746
1988 C, E, K
These resealing units are intended for use when other engine service is being performed which requires cylinder head removal (i.e., it is necessary to
install cylinder head dowels). Cylinder head removal to repair an intake gasket leak may make this kit uneconomical.
Each resealing kit contains detailed installation instructions including information on selection and position of spring/washer bolts and a revised bolt
torquing procedure and new lower torque values required.
IMPORTANT:
It is important to follow these instructions carefully to realize the maximum benefit from this new sealing system. It is likewise
important that all resealing kit components be installed together.
Gasket Only Kits
For the most economical repair as well as to provide for subsequent service of engines already converted with resealing kits, a series of "gasket only" kits
are also available.
These gasket kits are intended to directly replace the previously released gaskets described in Bulletin T-88-21. The kits contain only the new side
gaskets and end seals and may be used with the conventional design intake manifold bolts. Specific installation instructions are again included and must
be thoroughly followed.
P/N
Application
Replaces
3634753
1982-1985 C, E, K, D
3634619
1986-1987 C, E, K
3634754
1987-1988 V
3634660
3634755
1988 C, E, K
3634723
Upgrading to the new sealing system provided by the resealing kits is preferred and recommended whenever repair economics permit. 1989 production
