Installation - Mercury MerCruiser MCM 454 Mag MPI Service Manual

454 CID (7.4L) / 502 CID (8.2L)

Installation

IMPORTANT: When installing intake manifold gaskets, in next step, be sure to do the
following:
1. Apply Quicksilver Perfect Seal to intake manifold gaskets around coolant passages
(both sides).
Be sure to read and follow package label directions when using bellows adhesive.
2. Using 3M Brand Adhesive, glue neoprene gaskets to engine block between cylinder
heads.
3. Apply a small amount of RTV Sealer on neoprene gasket ends.
4. Set intake manifold gaskets in place, aligning bolt holes.
Index
Page 3A-30
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Be sure to install gasket with marked side up. Both gaskets are identical.
a - Exhaust Crossover Port Opening in Gasket
b - Intake Valve Port
c - Coolant Passages
a - Neoprene Gaskets
b - RTV Sealer
c - Gaskets
c
b
a
b
c
WARNING
a
b
c
b
a
SERVICE MANUAL NUMBER 23
72514
72514
90-861326--1 MARCH 1999