Cleaning And Inspection; Installation - MerCruiser GM4 Service Manual

3. Make matching marks on all retainers and lifters
as to location and orientation in bores, to allow
reassembly in exact position on camshaft lobes
(so that the roller's bearing and roller will roll in the
same direction on the same lobe, if reused). Re-
move valve lifters.
LIFTER "A"
a
b
c
d
e
f
g
h
i
LIFTER "A"
a - Push Rod Seat Retainer
b - Lifter Body
c - Push Rod Seat
d - Metering Valve (Lifter "A")
Inertia Valve (Lifter "B")
e - Plunger
f - Check Ball
g - Check Ball Spring
h - Check Ball Retainer
i - Plunger Spring
Index
3A - 14 - ENGINES
05030
LIFTER "B"
05030
LIFTER "B"

Cleaning and Inspection

1. Thoroughly clean all parts in cleaning solvent and
inspect them carefully.
2. If any parts are damaged or worn, entire lifter as-
sembly should be replaced.
3. If outer lifter body wall is scuffed or worn, inspect
cylinder block lifter bore.
4. If push rod seat is scuffed or worn, inspect push
rod.

Installation

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 lift-
er 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 cam-
shaft lobes before installing lifters.
IMPORTANT: DO NOT install used valve lifters if
a new camshaft has been installed.
1. Install valve lifters into bores.
2. Install push rod covers, using new gaskets and
torque to specification.
3. Install distributor, positioning rotor to number 1
cylinder position, then connect primary lead at
coil.
4. Install distributor cap and spark plug wires.
5. Adjust valves to specifications.
6. Adjust ignition timing, carburetor idle speed and
mixture.
90-816462 2-695