1997 ACURA NSX Service Repair Manual

Condenser

Overhaul

1. Remove the four bolts and nuts. Then separate the condenser duct from the condenser shroud, and remove the

condenser.

2. Remove the three mounting screws, then remove the condenser fan from the condenser shroud.

CONDENSER

CONDENSER

DUCT

NUTS

6 x 1.0 mm

9.8 N-m (1.0 kgf-m, 7.2 Ibf-ft)

CONDENSER FAN
SCREW

CONDENSER

SHROUD

SPACER

3. Assemble the condenser in the reverse order of disassembly. Be careful not to damage the tabs on the condenser

shroud when you attach it to the air intake duct.ProCarManuals.com

Compressor
Description
This compresso r i s a DENS O pisto n typ e fo r R-134a . A revolvin g incline d dis c drive s th e surroundin g 1 0 reciprocatin g pis -
tons . A s th e incline d dis c revolved , i t pushe s th e pistons , protecte d b y a cerami c shoe , thu s compressin g th e refrigerant .
RELIEF VALVE
PISTON S
FIEL D COI L
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Compressor
Illustrated Inde x
RELIE F VALV E
Replacement , pag e 22-8 7
2 5 N- m (2. 6 kgf-m , 1 9 Ibf-ft ) CENTE
R BOL T
PRESSUR E PLAT EInspection , pag e 22-8 5
SHIM(S )
SNA P RIN G B
Replace .
PULLEYInspection , pag e 22-8 5
SNA P RIN G A
Replace .
FIELD COI LInspection , pag e 22-8 5
O-RIN G
Replace .
SUCTIO N SERVIC E VALV E
COMPRESSO R(Do no t disassembly )
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Replacement
1. I f th e compresso r stil l works , ru n th e engin e a t idl e
for a fe w minute s wit h th e A/ C on , the n shu t th e
engin e of f an d disconnec t th e negativ e cabl e fro m
the battery .
2. Recove r th e refrigeran t usin g a R-134 a refrigeran t
Recovery/Recycling/Chargin g System . (se e pag e
22-73 ).
3 . Disconnec t th e compresso r connector .
COMPRESSO R
CONNECTO R
4. Rais e th e vehicl e o n a hoist . Mak e sur e it' s properl y
supporte d (se e sectio n 1 ).
5 . Remov e th e fron t bea m (se e sectio n 5 ).
6 . Disconnec t th e suctio n an d discharg e hose s fro m th e
compressor . Ca p th e ope n fitting s immediatel y t o
kee p moistur e an d dir t ou t o f th e system .
DISCHARG E HOS E
SUCTIO N
HOS E
8 x 1.2 5 mm29 N- m(3.0 kgf-m ,
2 2 Ibf-ft )
7. Loose n th e idle r pulle y cente r nu t an d adjustin g bolt ,
the n remov e th e bel t fro m compressor .
ADJUSTING BOL T
IDLE R PULLE Y CENTE R
NUT44 N- m (4. 5 kgf-m ,
3 3 Ibf-ft )
8. Remov e th e fou r mountin g bolt s an d compressor .
COMPRESSO R
MOUNTING BOLT S8 x 1.2 5 mm22 N- m (2. 2 kgf-m ,
1 6 Ibf-ft )
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Compressor
Replacemen t
9. I f necessary , remov e th e on e bol t fro m th e idle r
pulle y bracket , the n remov e th e fou r mountin g
bolt s an d th e compresso r bracket .
10 x 1.25 mm49 N- m (5. 0 kgf-m ,36 Ibf-ft )
IDLE R PULLE Y
BRACKE T BOL T
10 x 1.2 5 mm44 N- m (4. 5 kgf-m ,
3 3 Ibf-ft )
COMPRESSO R
BRACKET
10. I f necessary , remov e th e tw o othe r bolt s i n th e idle r
pulle y assembly .
IDLER PULLE Y
ASSEMBL Y
8 x 1.2 5 mm22 N- m (2. 2 kgf-m ,16 Ibf-ft )
11. Chec k th e idle r pulle y bearin g fo r pla y an d drag .
Replac e i t wit h a ne w on e i f it' s nois y o r ha s exces -
siv e pla y o r drag .
44 N- m (4. 5 kgf-m ,
3 3 Ibf-ft )
12. Instal l th e compresso r i n th e revers e orde r o f
removal ; and :
• I f you'r e installin g a ne w compressor , drai n al l
th e refrigeran t oi l ou t o f th e ol d compresso r an d
measur e it s volume . Subtrac t th e volum e o f ol d
oil fro m 16 0 ( 5 1/ 3 fl-oz , 5, 6 Imp-oz) ; th e resul t
i s th e amoun t o f oi l yo u shoul d drai n fro m th e
ne w compresso r (throug h th e suctio n fitting) .
• Replac e O-ring s wit h ne w one s a t eac h fitting ,
an d appl y refrigeran t oi l t o them .
NOTE : B e sur e t o us e th e righ t O-ring s fo r
R-134 a to avoi d leakage .
• Us e (ND-OI L 8 ) oi l fo r R-134 a DENS O pisto n typ e
compressor s only .
• D o no t retur n th e oi l t o th e containe r onc e
dispense d an d neve r mi x wit h othe r refrigeran t
oil s t o avoi d contamination .
• Immediatel y afte r usin g th e oil, replac e th e ca p
o n th e containe r an d sea l i t t o avoi d moistur e
absorption .
• D o no t spil l th e refrigeran t oi l o n th e vehicle ; i t
ma y damag e th e paint ; i f th e refrigeran t oi l con -
tact s th e paint , was h i t of f immediately .
13 . Adjus t th e compresso r bel t (se e pag e 22-88 ).
Afte r adjustin g th e belt , tighte n th e idle r pulle y
center nut .
The n tighte n th e adjustin g bol t securely .
14 . Charg e th e syste m (se e pag e 22-91 ).
15 . Tes t syste m performanc e (se e pag e 22-70 ).
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Clutch Inspectio n
Check th e plate d part s o f th e pressur e plat e fo r colo r
changes , peelin g o r othe r damage . I f ther e i s dam -
age , replac e th e clutc h set .
Chec k th e pulle y bearin g pla y an d dra g b y rotatin g
th e pulle y b y hand . Replac e th e clutc h se t wit h a ne w
on e i f i t i s nois y o r ha s excessiv e play/drag .
PULLEY
Measur e th e clearanc e betwee n th e pulle y an d th e
pressur e plat e al l th e wa y around . I f th e clearanc e i s
no t withi n specifie d limits , th e pressur e plat e mus t b e
remove d an d shim s adde d o r remove d a s required ,
followin g th e procedur e o n pag e 22-86 .
Clearance : 0. 5 ± 0.1 5 m m (0.02 0 ± 0.00 6 in )
NOTE : Th e shim s ar e availabl e i n thre e thicknesses :
0.1 mm , 0. 3 m m an d 0. 5 mm .
Chec k resistanc e o f th e fiel d coil .
Fiel d Coi l Resistance : 3. 6 ± 0. 2 ohm s a t 68° F (20°C )
I f resistanc e i s no t withi n specifications , replac e th e
field coil .
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Compressor
Clutch Overhau l
1. Remov e th e cente r bol t whil e holdin g th e pressur e
plate .
CENTE R BOL T14 N- m (1. 4 kgf-m , 1 0 Ibf-ft )
A/C CLUTC H HOLDE RCommerciall y availabl eRobinair: P/ N 1020 4Kent-Moore : P/ N J3787 2
2. Remov e th e pressur e plat e an d shim(s) , takin g car e
no t t o los e th e shims .
PRESSUR EPLATE
SHIM(S )
3. Us e sna p rin g plier s t o remov e sna p rin g B , the n
remov e th e pulley .
NOTE:
• B e carefu l no t t o damag e th e pulle y an d com -
presso r durin g removal/installation .
• Onc e th e sna p rin g B wa s removed , replac e i t
wit h a ne w one .
SNA P RIN G BReplace .
PULLEY
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4. Remove the snap ring A and the field coil.

NOTE:

• Be careful not to damage the field coil and com-

pressor during removal/installation.

• Once the snap ring A was removed, replace it

with a new one.

SNAP RING A

Replace.

FIELD

COIL

5. Install parts in the reverse order of removal, and:

• Install the field coil with the wire side facing

down (see above).

• Clean the pulley and compressor sliding surfaces

with non-petroleum solvent.

• Check the pulley bearings for excessive play.

• Make sure the snap rings are in the groove

properly.

• Apply locking agent to the threads on the center

bolt.

• Make sure that the pulley turns smoothly after it's

reassembled.ProCarManuals.com