Removal; Installation - Mercury MerCruiser MCM 454 Mag MPI Service Manual

Table of Contents

SERVICE MANUAL NUMBER 23

Removal

IMPORTANT: Keep push rod and hydraulic valve lifter from each valve together as a

matched set and mark them so they can be reinstalled in the same location later.

Remove as outlined:

1. Remove rocker arm covers.

2. Remove intake manifold.

3. Remove rocker arm assemblies and push rods.

4. Remove valve lifters.

5. Remove lifter restrictors on roller lifters models.

6. Remove valve lifters.

IMPORTANT: It is recommended that the engine oil be changed and a new oil filter be

installed whenever servicing valve lifters or camshaft.

IMPORTANT: Before installing lifters, coat the bottom of the lifter with engine oil. If

new lifters or a new camshaft have been installed, an additive containing EP lube

(such as General Motors Cam and Lifter Pre-lube or equivalent) should be poured

over camshaft lobes before installing lifters.

IMPORTANT: Before installation, coat entire valve lifter with engine oil.

IMPORTANT: DO NOT install used valve lifters if a new camshaft has been installed.

1. Install hydraulic valve lifters and components.

2. Install intake manifold.

3. Install push rods and rocker arms. Torque rocker arm bolts to specification.

4. Install rocker arm cover.

5. Start engine and check for leaks.

90-861326--1 MARCH 1999

Downloaded from

https://needmanual.com/

Lifter Restrictor Retainer

Lifter Restrictor

Roller Lifter

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

Table of Contents