Fleetwood V8-252 4.1L VIN 8 FI (1983)
Intake Manifold: All Technical Service Bulletins
Engine - Intake Manifold Oil Leaks
Bulletin No. T 85-28
File In Group
6A
Number
68
Date
Nov. '84
SUBJECT:
HT4100 INTAKE MANIFOLD OIL LEAKS
MODELS AFFECTED: 1982-1985 DEVILLES, FLEETWOODS, BROUGHAMS, ELDORADOS AND SEVILLES
FIGURE 1 - Intake Manifold
Some Cadillacs equipped with an HT4100 engine may experience an oil leak at the intake manifold to block seal. This condition may be caused by a
split intake manifold end seal. To correct this condition, new silicone end seals (refer to Figure 1) were released for production during the 1984 model
year. The breakpoints are as follows:
MODEL
VIN
1984 RWD Devilles and Broughams
139931
1984 Eldorado
659759
1984 Seville
831723
1985 FWD Devilles and Fleetwoods
213362
To repair this condition on HT4100 engines produced prior to the listed VINs, the new end seals have also been released for service, and will be part of
the intake manifold gasket kit (P/N 3634619). This new seal can be identified by its gray color.
The previous intake manifold gasket kit (P/N 3634584) is still available and may be used on repairs if the original end seals were not split.