Table of Contents
Advertisement
1 8-48
1977 PONTIAC SERVICE MANUAL
25. Remove rear outer ZERO thrust race from shaft and
install thrust race just selected.
The ZERO thrust race may be put aside for re-use in
additional gaging or rebuilding operations.
A-6 TEFLON PISTON RlNG
REPLACEMENT
The Teflon piston ring installing, sizing and gaging tools
are shown in Fig. 1B-72.
1. Remove the old piston rings by CAREFULLY slicing
through the ring with a knife or sharp instrument, holding
the blade almost flat with the piston surface. Be careful not
to damage the aluminum piston OR piston groove in cutting
to remove the ring.
WARNING: EXERCISE PERSONAL CARE
I N CUTTING THE PISTON RlNG FOR
REMOVAL.
2. Clean the piston and piston ring grooves with a
recommended cleaning solvent and blow the piston dry with
dry air (Trichlorethylene, naphtha, stoddard solvent,
kerosene, or equivalent).
3. Set the piston on end on a clean, flat surface and install
the Ring Installer Guide J 24608-2 on the end of the piston
(Fig. 1B-73).
4. Install a Teflon ring on the Ring Installer Guide J
24605-2 as shown in Fig. 1B-73, with the dished or dull-
side down and glossy-side up.
5. Push the Ring Installer J 24608-5 down over the
Installer Guide J 24608-2 to install the Teflon ring in the
piston ring groove (Fig. 1B-74). If the Teflon ring is slightly
off position in the ring groove, it can be positioned into place
by fingernail or blunt-edged tool that will not damage the
piston.
The Ring Installer J 24608-5 will retain the Installer
Guide J 24608-2 internally when the Teflon ring is installed
on the piston. Remove the Installer Guide from the Ring
Installer and DO NOT STORE THE INSTALLER
GUIDE IN THE RlNG INSTALLER, as the Ring
Installer Segment Retainer 0-Ring J 24608-3 will
be stretched and possibly weakened during
storage. This could result in the 0-Ring J 24608-3 not
holding the Ring Installer segments tight enough to the
Installer Guide J 24608-2 to properly install the Teflon ring
on the piston.
6. Lubricate the piston ring area with 525 viscosity
refrigerant oil and rotate the Piston and Ring Assembly into
the Ring Sizer J 24608-6 at a slight angle
(Fig. 1B-76). Rotate the piston, while pushing inward,
until the piston is inserted against the center stop of the Ring
Sizer J 23608-6.
C AUTI 0 N: DO NOT push the Piston and Ring
Assembly into the Ring Sizer J 24608-6 without
proper positioning and rotating as descn'bedabove,
as the ends of the needle &ngs
of the Ring Sizer
may damage the end of the piston.
7. Rotate the Piston and Ring Assembly in the Ring
Sizer J 24608-6 several COMPLETE turns, until the
Assembly rotates relatively free in the Ring Sizer (Fig. 1B-
76).
8. Remove the Piston and Ring Assembly, wipe the end
of the piston and ring area with a clean cloth and then push
the Piston and Ring Assembly into the Ring Gage J 24608-1
(Fig. 1B-77). The piston should go through the Ring Gage
with a 6-lb. force or less without lubrication. If not, repeat
Steps 6 and 7.
9. Repeat the procedure for the opposite end of the
piston.
CAUTION: DO NOT lay the piston down on a
dirty surface where dirt or metal chips might
become imbedded in the Tefin ring surface.
10. Lubricate BOTH ENDS of the piston with 525
viscosity refrigerant oil before inserting the piston into the
cylinder bore.
C A U T I 0 N : Reasonable care should be exercised
in installing the piston into the cylinder bore to
prevent damage to the Tefin nng.
Advertisement
Table of Contents
