GM Service Manual Online
For 1990-2009 cars only
Makes
🢒
Chevrolet
🢒
1996
🢒
Astro - 4WD
🢒
Engine
🢒
Engine Mechanical - 4.3L (VIN W)
🢒 Valve Stem Oil Seal and Valve Spring Replacement
Removal Procedure
Tools Required
•
J 23590
Spark Plug Port Adapter
•
J 5892-D
Valve Spring Compressor
•
J 38606
Valve Spring Compressor
Remove the valve rocker arm cover. Refer to
Valve Rocker Arm Cover Replacement
or
Valve Rocker Arm Cover Replacement
.
Remove the valve rocker arms. Refer to
Valve Rocker Arm and Push Rod Replacement
.
Remove the spark plugs. Refer to
Spark Plug
in Engine Electrical.
Install the
J 23590
into the spark plug hole.
Apply compressed air in order to hold the valves in place.
Install the valve rocker arm nut.
Use the
J 23590
in order to compress the valve spring.
Use the
J 38606
if clearance does not permit use of J 23590.
Remove the valve keys (1).
Carefully release the valve spring tension.
Remove the
J 5892-D
Remove the cap (2), rotator, and spring (4).
Remove the valve seal (3).
Installation Procedure
Tools Required
•
J 23590
Spark Plug Port Adapter
•
J 5892-D
Valve Spring Compressor
•
J 38606
Valve Spring Compressor
Install the new valve seal (3) over the valve stem and set it against the head.
Install the cap (2), rotator, and spring (4).
Use the
J 23590
in order to compress the valve spring.
Use the
J 38606
if clearance does not permit use of J 23590.
Install the valve keys (1). Use grease in order to hold the valve keys in place.
Carefully release the valve spring pressure, making sure the valve keys stay in place.
Remove the
J 5892-D
or
J 38606
and the
J 23590
.
Install the spark plugs. Refer to
Spark Plug
in Engine Electrical.
Install the valve rocker arms. Refer to
Valve Rocker Arm and Push Rod Replacement
.
Install the valve rocker arm cover. Refer to
Valve Rocker Arm Cover Replacement
or
Valve Rocker Arm Cover Replacement
.