Rocker Arm/Push Rod; Removal; Cleaning And Inspection; Installation - Mercury MerCruiser MCM 454 Mag MPI Service Manual

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

Rocker Arm/Push Rod

Removal

NOTE: When servicing only one cylinder's rocker arms, bring that cylinder's piston up to
TDC before removing rocker arms. When servicing all rocker arms, bring No. 1 piston up
to TDC before removing rocker arms.
1. Remove rocker arm covers as outlined.
2. Remove rocker arm assemblies and push rods.
IMPORTANT: Place rocker arm assemblies and push rods in a rack for reassembly
in their original locations.

Cleaning and Inspection

1. Clean parts with solvent and dry with compressed air.
2. Inspect all contact surfaces for wear. Replace all damaged parts.

Installation

IMPORTANT: When installing rocker arms and rocker arm balls, coat bearing sur-
faces of rocker arms and rocker arm balls with engine oil.
1. Install push rods in their original locations. Be sure push rods seat in lifter socket.
2. Install rocker arms, rocker arm balls and rocker arm nuts in their original locations.
3. Torque to 40 lb-ft (54 Nm).
Index
Page 3A-32
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SERVICE MANUAL NUMBER 23
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90-861326--1 MARCH 1999