Overhaul Compressor; Compressor Rear Head Assembly; Compressor Major Interior Mechanism; Sealing Surface On Head Casting Web - Pontiac Grand Prix Service Manual

CUSTOM AIR CONDITIONING
1A-17
gasket kit should be used whenever it is necessary to
overhaul or rebuild entire compressor internal mecha-
nism, or when replacing some individual internal part.
OVERHAUL COMPRESSOR
Anytime a major overhaul or rebuilding operation is to
be performed on this compressor, obtain and install
compressor gasket kit. This kit includes all of the
necessary O-rings and gaskets. Obtain also, an ample
supply of piston rings.
1. Remove drive plate and hub assembly.
2. Remove pulley and bearing assembly.
3. Remove clutch coil and coil housing assembly.
4. Remove compressor assembly, leaving fittings
assembly attached to refrigerant lines. Keep compres-
sor horizontal at all times. Placing the compressor on
either end will allow oil from the compressor sump to
enter the head.
5. Seal compressor fittings opening and openings in
compressor rear head.
6. Thoroughly clean exterior of compressor assembly
and blow dry with compressed dry air.
7. Clean compressor assembly on clean, dry work
bench.
NOTE: Under NO circumstances should compressor be
placed on the pulley end.
COMPRESSOR REAR HEAD ASSEMBLY
REMOVE
1. Remove compressor oil plug, tilt compressor and
drain oil into clean dry container. It may be possible to
get only 4 to 6 ozs. of oil from the compressor at this
time.
2. Attach J 9396 holding f ~ t u r e to compressor and
mount in vise.
3. Remove compressor pressure relief valve.
4. Remove four lock nuts from threaded studs welded
to compressor shell and remove rear head.
NOTE: Some oil may drain when the head is removed.
5. Examine surface on the rear head casting web. If
any damage is observed, the head should be replaced
(Fig. 1 A- 1 8).
6. Remove suction screen and examine for damage or
contamination. Clean or replace as necessary.
Fig.
1A-18
Sealing Surface on Head Casting Web
7. Remove oil pump gears noting how they are mated
(end-to-end) and inspect for damage. Replace both
gears if one or both show damage. Keep gears mated
as they were when removed.
8. Remove rear head to dbmpressor shell O-ring seal
and inspect for damage, cuts nicks or imperfections. A
damaged seal may be the cause of a refrigerant leak.
In any event, this O-ring seal must be replaced with a
new one.
9. Carefully remove rear discharge valve plate assem-
bly by prying up on assembly (Fig. 1A-19, and
examine discharge valve reeds and seats. Replace
entire assembly if excessively scored or if any one of
the three reeds is broken or seats are damaged.
10. Carefully remove rear suction reed and examine
for -any damage. Replace if necessary (Fig. 1A-20).
COMPRESSOR MAJOR INTERIOR
MECHANISM
REMOVE, INSPECT AND CHECK
1. Remove shaft seal seat retaining ring, using J 4245
(No. 23 Truarc pliers).
Fig.
1A-19
Removing Discharge Valve Plate