ACURA TL 1995 Service Repair Manual

Secondary H02S :
1. Mov e th e fron t passenger' s sea t forward .
Pull th e carpe t bac k t o expos e th e secondar y H02 S
connector .
2 . Disconnec t th e secondar y HO2 S connector .
SECONDAR Y HO2 S
CONNECTO R
3. Remov e th e wir e harnes s cove r an d hea t shields .
HEAT SHIELD S
8 x 1.2 5 m m22 N- m (2. 2 kgf-m ,
1 6 Ibf-ft )6 x 1. 0 m m9.8 N- m (1. 0 kgf-m , 7. 2 Ibf-ft )
4. Remov e th e secondar y H02S .
SECONDAR Y HO2 S
4 4 N- m (4. 5 kgf-m ,
3 3 Ibf-ft )
5. Instal l th e secondar y H02 S i n revers e orde r o f
removal .
• B e sur e t o follo w th e instruction s belo w whe n
installin g th e secondar y HO2S .
CAUTION : D o no t le t th e secondar y HO2 S wir e
harnes s contac t th e hea t shields . I f th e sec -
ondar y HO2 S wir e harnes s contact s th e hea t
shield , kee p th e wir e harnes s awa y fro m th e
hea t shiel d b y movin g th e wir e harnes s clamp .
NOTE : Chec k tha t th e clearanc e i s mor e tha n 4
m m (0. 2 in ) betwee n th e hea t shield s an d rea r
sid e o f th e TW C a s shown . I f th e clearanc e is les s
tha n 4 m m (0. 2 in) , loose n th e 6 x 1. 0 m m bolt s
o n th e hea t shield s an d tighte n the m adjustin g
th e clearance .
4 m m(0.2 in )
WIR E HARNES S
COVE R
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Radiator
Illustrate d Inde x
Syste m is unde r hig h pressur e whe n th e
engin e i s hot . T o avoi d dange r o f releasin g scaldin g
coolant , remov e ca p onl y whe n th e engin e i s cool .
Total Coolin g Syste m Capacit y (Includin g heate r an d
reservoir )
7.0 (7. 4 US qt , 6. 2 Im p qt )
Reservoi r capacity : 0. 7 (0. 7 U S qt , 0. 6 Im p qt )
RADIATO REngine coolan t
Refillin g an d bleeding , pag e 10- 5
Lea k test , pag e 10- 6
Inspec t soldere d joint s an d
seam s fo r leaks .
Blo w ou t dir t fro m betwee n
cor e fin s wit h compresse d air .
I f insects , etc. , ar e cloggin g
radiator , was h the m of f wit h
low-pressur e water .
CAUTION : Whe n pourin g engin e coolant , b e sur e t o
shu t th e rela y bo x li d an d no t t o spil l coolan t o n th e elec -
trica l part s o r th e painte d portion . I f an y coolan t spills ,
rins e i t of f immediately .
NOTE:
• Chec k al l coolin g syste m hose s fo r damage , leak s o r
deterioratio n an d replac e i f necessary .
• Chec k al l hos e clamp s an d retighte n i f necessary .
• Us e ne w O-ring s whe n reassembling .
RADIATOR CA PPressur e testing , pag e 10- 6
SELF-LOCKIN G NU TA: 4. 4 N- m (0.4 5 kgf-m ,3.3 Ibf-ft )B: 5. 4 N- m (0.5 5 kgf-m ,4.0 Ibf-ft )Replace .
6 x 1. 0 m m7 N- m (0. 7 kgf-m ,5 Ibf-ft )
COOLAN TRESERVOI R
FAN MOTO R
RADIATO R FA NSHROU D
AUTOMATI C TRANSMISSIO N
FLUI D (ATF ) COOLE R HOSE S
Refe r t o sectio n 1 4 whe n
installing .
CONDENSO RFAN SHROU D
LOWER RADIATO RHOSE
ENGIN E COOLAN TTEMPERATUR ESWITCH A
2 4 N- m (2. 4 kgf-m , 1 7 Ibf-ft )
O-RIN GReplace .6 x 1. 0 m m9.8 N- m (1. 0 kgf-m ,7.2 Ibf-ft )
A: SHOW A ALUMINU M manufacture d radiator .
B : DENS O manufacture d radiator .
O-RINGReplace .DRAINPLUG
UPPE RRADIATO RHOSE
RADIATO RFAN
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Engine Hos e Connections :
THERMOSTA THOUSINGFAST IDL E THERM O
VALV E
IDL E AI R CONTRO L
(IAC ) VALV E
HEATE RHOSES
HEATE RVALVE
6 x 1. 0 m m12 N- m (1. 2 kgf-m ,
8. 7 Ibf-ft )
O-RIN GReplace . DIFFERENTIA
L OI L
COOLE R BYPAS SHOSES
8 x 1.2 5 mm22 N- m (2. 2 kgf-m , 1 6 Ibf-ft )
CONNECTIN GPIPE
6 x 1. 0 m m12 N- m (1. 2 kgf-m , 8. 7 Ibf-ft )
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Radiator
Replacemen t
1. Drai n engin e coolant .
2 . Remov e th e uppe r an d lowe r radiato r hoses , an d
AT F coole r hoses .
3 . Disconnec t th e fa n moto r connector s an d EC T
switc h A connector .
4 . Remov e th e radiato r uppe r brackets , the n pul l u p
th e radiator . 5
. Remov e th e fa n shrou d assemblie s an d othe r part s
from th e radiator .
Install th e radiato r i n th e revers e orde r o f removal :
NOTE:
• Se t th e uppe r an d lowe r cushion s securely .
• Fil l th e radiato r wit h engin e coolan t an d blee d
the air .
6 x 1. 0 m m9.8 N- m (1. 0 kgf-m ,
7. 2 Ibf-ft )UPPE R BRACKE TAND CUSHIO N
RADIATO R
ATF COOLE R
HOS E
Refe r t o sectio n 1 4
whe n installing .
LOWERRADIATO RHOSE
RADIATO R FA N SWITC H A
2 4 N- m (2. 4 kgf-m ,
1 7 Ibf-ft )
COOLAN T
RESERVOI R
6 x 1. 0 m m7 N- m (0. 7 kgf-m ,
5 Ibf-ft )
RADIATO R FA N
SHROU D
CONDENSO R
FA N SHROU D
6 x 1. 0 m m9.8 N- m (1. 0 kgf-m , 7. 2 Ibf-ft )
LOWE RCUSHIO N
FAN MOTO R
CONNECTO R
EC T SWITC H A
CONNECTO R
O-RIN
G
Replace .
DRAIN
PLU G
O-RIN G
Replace .
UPPERRADIATO RHOSE
RADIATO RCAP
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Engine Coolan t Refillin g an d Bleedin g
CAUTION : Whe n pourin g engin e coolant , b e sur e t o
shu t th e rela y bo x li d an d no t t o le t coolan t spil l o n th e
electrica l part s o r th e paint . I f an y coolan t spills , rins e it
of f immediately .
NOTE:
• Perfor m thi s procedur e whe n th e engin e i s cool .
• Befor e replacin g th e coolant , tur n th e ignitio n O N (II) ,
slowl y tur n th e climat e contro l temperatur e kno b t o
90 ° an d tur n of f th e ignition . Thi s wil l allo w th e
coolan t i n th e heate r t o drai n ou t wit h th e res t o f th e
system .
1.Whe n th e radiato r i s cool , remov e th e radiato r cap .
Loose n th e drai n plug , an d drai n th e coolant .
Remov e th e drai n bol t fro m th e righ t sid e o f th e
cylinde r bloc k t o drai n th e block .
DRAIN PLU G
DRAI N BOL T59 N- m (6. 0 kgf-m ,
4 3 Ibf-ft )WASHE RReplace.
3. Appl y liqui d gaske t t o th e drai n bol t threads , the n
reinstal l th e bol t wit h a ne w washe r an d tighte n i t
securely .
4. Tighte n th e radiato r drai n plu g securely .
5 . Remove , drai n an d reinstal l th e reservoir . Fil l th e
tan k halfwa y t o th e MA X mar k wit h water , the n u p
t o th e MA X mar k wit h antifreeze .
6 . Mi x th e recommende d antifreez e wit h a n equa l
amoun t o f wate r i n a clea n container .
NOTE:
• Us e onl y genuin e Hond a antifreeze/coolant .
• Fo r bes t corrosio n protection , th e coolan t con -
centratio n mus t b e maintaine d year-roun d a t
50 % minimum . Coolan t concentration s les s tha n
50 % ma y no t provid e sufficien t protectio n
agains t corrosio n o r freezing .
• Coolan t concentration s greate r tha n 60 % wil l
impai r coolin g efficienc y an d ar e no t recom -
mended .
7.
8.
9 .
CAUTION :
• D o no t mi x differen t brand s o f antifreeze/coolants .
• D o no t us e additiona l rus t inhibitor s o r anti-rus t
products ; the y ma y no t b e compatibl e wit h th e
coolant.
Engin e Coolan t Refil l Capacit y [includin g reservoi r
(0.7 (0. 7 U S qt , 0. 6 Im p qt))] :
5.2 (5. 5 US qt , 4. 6 Im p qt )
Loose n th e ai r blee d bolt s i n th e thermosta t hous -
in g an d intak e manifold , the n fil l th e radiato r t o th e
botto m o f th e fille r nec k wit h th e coolan t mixture .
Tighte n th e blee d bolt s a s soo n a s coolan t start s t o
ru n ou t i n a stead y strea m withou t bubbles .
BLEED BOLT S9.8 N- m (1. 0 kgf-m , 7. 2 Ibf-ft )
With th e radiato r ca p off , star t th e engin e an d le t i t
ru n unti l warme d u p (radiato r fa n come s o n a t leas t
twice) . Then , i f necessary , ad d mor e coolan t mi x t o
brin g th e leve l bac k u p t o th e botto m o f th e fille r
neck.
Put th e radiato r ca p o n tightly , the n ru n th e engin e
agai n an d chec k fo r leaks .
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Radiator
Cap Testin g
1. Remov e th e radiato r cap , we t it s sea l wit h engin e
coolant , the n instal l i t o n th e pressur e tester .
2 . Appl y a pressur e o f 9 3 - 12 3 kP a (0.9 5 - 1.2 5 kgf/cm
2,
14-1 8 psi) .
3. Chec k fo r a dro p in pressure .
4 . I f th e pressur e drops , replac e th e cap .
RADIATO R PRESSUR E TESTE R
(Commerciall y available )
RADIATO R
CAP
ADAPTO R
(fo r 3 2 m m neck , lo w profile )
Testing
1. Wai t unti l th e engin e i s cool , the n carefull y remov e
the radiato r ca p an d fil l th e radiato r wit h engin e
coolan t t o th e to p o f th e fille r neck .
2 . Attac h th e pressur e teste r t o th e radiato r an d appl y
a pressur e o f 93-12 3 kP a (0.9 5 - 1.2 5 kgf/cm
2, 1 4 -
18 psi) .
3. Inspec t fo r engin e coolan t leak s an d a dro p i n pres -
sure.
4. Remov e th e teste r an d reinstal l th e radiato r cap .
NOTE : Chec k fo r engin e oi l i n th e coolan t and/o r
coolan t i n th e engine oil.
RADIATO R PRESSUR ETESTER(Commerciall y available )
ADAPTO R
(for 3 2 m m neck , lo w profile )
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Thermostat
Replacemen t
NOTE: Us e ne w O-ring s whe n reassembling .
O-RINGReplace .
THERMOSTA THOUSING
6 x 1. 0 m m12 N- m (1. 2 kgf-m , 8. 7 Ibf-ft )
8 x 1.2 5 mm22 N- m (2. 2 kgf-m , 1 6 Ibf-ft )
RADIATO RFANSWITC H B
2 4 N- m (2. 4 kgf-m , 1 7 Ibf-ft )
O-RING S
Replace .
THERMOSTA TCOVERTHERMOSTA TInstall wit h pi n up .
RUBBE R SEA LReplace .BLEED BOL T
9. 8 N- m (1. 0 kgf-m ,
7. 2 Ibf-ft ) EC
T SENSO R
1 8 N- m (1. 8 kgf-m ,
1 3 Ibf-ft )
COOLAN T TEMPERATUR E GAUG E
SENDIN G UNI T9 N- m (0. 9 kgf-m , 7 Ibf-ft )
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Thermostat Radiato
r Fa n Switche s
Testing
Replac e th e thermosta t i f i t i s ope n a t roo m temperature .
T o tes t a close d thermostat :
1 . Suspen d th e thermosta t i n a containe r o f wate r a s
shown .
2 . Hea t th e water , an d chec k th e temperatur e wit h a
thermometer . Chec k th e temperatur e a t whic h th e
thermosta t firs t opens , an d a t whic h i t i s full y open .
CAUTION : D o no t le t th e thermomete r touc h th e
botto m of th e ho t container .
3 . Measur e lif t heigh t of the thermosta t whe n full y
open .
STANDAR D THERMOSTA T
Lift height :
Primar y valve : 10. 0 m m (0.3 9 in ) min .
Secondar y valve : 8. 5 m m (0.3 3 in ) min .
Start s opening :
Primar y valve : 176-183° F (80-84°C )
Secondar y valve : 18 1 - 189° F (8 3 - 87°C )
Full y open : 203° F (95°C )
THERMOMETE R
THERMOSTA T
Testing
Removin g th e radiato r fa n switc h whil e
th e engin e is ho t ca n caus e th e coolan t t o spra y out , seri -
ousl y scaldin g you . Alway s le t th e engin e an d radiato r
coo l dow n befor e removin g th e switch .
NOTE : Blee d ai r fro m th e coolin g syste m afte r installin g
th e radiato r fa n switc h (se e pag e 10-5 ).
1 . Remov e th e radiato r fa n switc h A fro m th e radiato r
(se e pag e 10-2 ) an d radiato r fa n switc h B fro m th e
thermosta t housin g (se e pag e 10-9 ).
2 . Suspen d th e switc h i n a containe r of wate r a s
shown .
THERMOMETE R
RADIATORFANSWITC H
WATER
3. Hea t th e wate r an d chec k th e temperatur e wit h a
thermometer .
CAUTION : D o no t le t th e thermomete r touc h th e
botto m of th e ho t container .
4 . Measur e th e resistanc e betwee n th e A an d B termi -
nal s accordin g t o th e table .
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Water Pum p
Illustrate d Inde x
RADIATO R FA N SWITC H B
2 4 N- m (2. 4 kgf-m , 1 7 Ibf-ft )
O-RING S
Replace .
THERMOSTA T
HOUSIN G
8 x 1.2 5 mm22 N- m (2. 2 kgf-m , 1 6 Ibf-ft )
BLEE D BOL T
9. 8 N- m (1. 0 kgf-m ,
7. 2 Ibf-ft )
O-RIN G
Replace .
O-RINGReplace .
ECT SENSO R
1 8 N- m (1. 8 kgf-m ,
1 3 Ibf-ft )
COOLAN T
TEMPERATUR E GAUG E
SENDIN G UNI T9 N- m (0. 9 kgf-m ,
7 Ibf-ft )
8 x 1.2 5 mm22 N- m (2. 2 kgf-m ,
1 6 Ibf-ft )
CONNECTIN G
PIPE
WATE R PUM P
Inspection , pag e 10-1 0
6 x 1. 0 m m12 N- m (1. 2 kgf-m ,
8. 7 Ibf-ft )
Apply liqui d gaske tto th e bol t threads .
O-RINGReplace .
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Water Pum p
Inspectio n
1. Remov e th e timin g bel t (se e pag e 6-10 ).
2 . Tur n th e wate r pum p pulle y counterclockwise .
Chec k tha t i t turn s freely .
3 . Chec k fo r sign s o f sea l leakage .
NOTE : A smal l amoun t o f "weeping " fro m th e blee d
hol e is normal .
BLEED HOL E
BLEE D HOL E
Replacemen t
1. Remov e th e timin g bel t (se e pag e 6-10 ).
2 . Remov e th e wate r pum p b y removin g fiv e bolts .
NOTE : Inspect , repai r an d clea n th e O-rin g groov e
an d matin g surfac e wit h th e cylinde r block .
O-RIN GReplace .
WATER PUM P
6 x 1. 0 m m12 N- m (1. 2 kgf-m ,8.7 Ibf-ft )Apply liqui d gaske tto th e bol t threads .
3. Instal l th e wate r pum p in th e revers e orde r o f removal .
NOTE:
• Kee p th e O-rin g i n positio n whe n installing .
• Clea n th e spille d engin e coolant .
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