Intake Manifold - Revised
84cadillac04Bulletin No. T 83-104B
File In Group 6A
Number 41
Date July '84
SUBJECT: HT4100 INTAKE MANIFOLD
MODELS AFFECTED: ALL 1982-1984 SEVILLES AND ELDORADOS AND RWD FLEETWOODS AND DEVILLES
FIGURE 1 - Intake Manifold Bolts Location, Sizes and Torque:
This bulletin supersedes Serviceman Bulletin 83-104 and 83-104A, Group 6A, #41, which should be destroyed.
The intake manifold (P/N 1630556) currently available through GMWDD for servicing 1982, 1983 and 1984 HT4100 engines has different height manifold bolt bosses than the intake manifolds used on 1982, 1983 and early 1984 HT4100 engines. When installing this service intake manifold on an HT4100 engine that was originally equipped with an early intake manifold, a "D" style bolt must be used in the #15 position, and a 5 mm thick washer, such as P/N 3706737, must be installed between the engine lift bracket and the intake manifold on bolt number 15. (Due to a bolt boss height change and the use of a new production engine lift bracket, the new intake manifold uses a "C" style bolt in position #15 when installed with the new production style lift bracket.) When replacing the intake manifold, use the bolts at the locations and torque sequences, as shown in Figure 1. When identifying intake manifold styles, refer to Figure 1 for the manifold casting I.D. number location.
NOTE: Use the following part numbers if service bolts are to be used when replacing manifolds.
BOLT P/N
A 11504499
B 11500921
C 11504801
D 11500924 To be used with washer P/N 2436162