ACURA NSX 1997 Service Repair Manual

Repair
5. Remov e th e #60 0 pape r an d thoroughl y was h th e
entir e valv e bod y i n solvent , the n dr y wit h com -
presse d air .
6 . Coa t th e valv e wit h ATF , the n dro p i t int o it s bore . I t
shoul d dro p t o th e botto m o f th e bor e unde r it s ow n
weight . I f not , repea t ste p 4 an d 5 , the n retest . I f th e
valve s stil l sticks , replac e th e valv e body .
NOTE
: Thi s repai r i s onl y necessar y i f on e o r mor e
o f th e valve s i n a valv e bod y d o no t slid e smoothl y
i n thei r bores . Us e thi s procedur e t o fre e th e valves .
1 . Soa k a shee t o f #60 0 abrasiv e pape r i n AT F fo r
abou t 3 0 minutes .
2 . Carefull y ta p th e valv e bod y s o th e stickin g valv e
drop s ou t o f it s bore .
CAUTION : I t ma y b e necessar y t o us e a smal l
screwdrive r t o pr y th e valv e free . B e carefu l no t t o
scratc h th e bor e wit h th e screwdriver .
3 . Inspec t th e valv e fo r an y scuf f marks . Us e th e ATF -
soake d #60 0 pape r t o polis h of f an y burr s tha t ar e
o n th e valve , the n was h th e valv e i n solven t an d dr y
i t wit h compresse d air .
4 . Rol l u p hal f a shee t o f ATF-soake d pape r an d inser t
i t i n th e valv e bor e o f th e stickin g valve .
Twist th e pape r slightly , s o tha t i t unroll s an d fit s
the bor e tightly , the n polis h th e bor e b y twistin g th e
pape r a s yo u pus h i t i n an d out .
CAUTION : Th e valv e bod y i s aluminu m an d
doesn' t requir e muc h polishin g t o remov e an y
burrs .
7. Remov e th e valve , an d thoroughl y clea n i t an d th e
valv e bod y wit h solvent . Dr y al l part s wit h com -
presse d air , the n reassembl e usin g AT F a s a lubricant .
ProCarManuals.com

NOTE: Coat all parts with ATF before assembly.

• Install the valve, valve spring and cap in the valve

body, then install the roller.
• Set the spring in the valve, and install it in the valve

body. Push the spring in with a screwdriver, then

install the spring seat.
Assembly
ValveProCarManuals.com

• Set the spring in the valve, and install it in the valve

body. Install the spring with a screwdriver, then

install the valve cap with the cutout aligned with the

screwdriver.
• Install the valve, spring and cap in the valve body.

Push on the cap, then install the stopper seat.ProCarManuals.com

• Cap s wit h on e projecte d ti p an d on e fla t en d ar e in -
stalle d wit h th e fla t en d towar d th e spring .
• Cap s wit h a projecte d ti p o n eac h en d ar e installe d
with th e smalle r ti p towar d th e spring . Th e smal l ti p
is a sprin g guide . •
Cap s wit h hollo w end s ar e installe d wit h th e hollo w
en d awa y fro m th e spring .
• Cap s wit h notche d end s ar e installe d wit h th e notc h
towar d th e spring .
• Cap s wit h fla t end s an d a hol e throug h th e cente r ar e
installe d wit h th e smalle r hol e towar d th e spring .
Descriptio n
Valve Cap s
• Cap s wit h on e projecte d ti p an d hollo w en d ar e in -
stalle d wit h th e ti p towar d th e spring . Th e ti p i s a
sprin g guide . •
Cap s wit h fla t end s an d a groov e aroun d th e ca p ar e
installe d wit h th e groov e sid e opposit e th e spring .
ProCarManuals.com

1. Instal l th e pum p gear s an d shaf t i n th e mai n valv e
body.
3. Remov e th e shaft , the n measur e th e thrus t clear -
anc e o f th e drive n gear-to-valv e body .
Drive/Drive n Gea r thrus t (Axial ) Clearance :
Standard (New) : 0.03-0.0 5 m m
(0.001-0.00 2 in. )
Servic e Limit : 0.0 7 m m (0.002 8 in. )
Inspectio n
ATF Pum p
2. Measur e th e sid e clearanc e o f th e driv e an d drive n
gears .
Pum p Gear s Sid e (Radial ) Clearance :
Standar d (New) : Driv e gea r (diameter )
0.210-0.26 5 m m
(0.0083-0.010 4 in )
Drive n gea r (radius )
0.035-0.06 3 m m
(0.0014-0.002 5 in )
ProCarManuals.com

NOTE:
Clean al l part s thoroughl y i n solven t o r carbureto r cleaner , an d dr y wit h compresse d air .
Blo w ou t al l passages .
Replac e valv e bod y a s a n assembly if an y part s ar e wor n o r damaged .
Chec k al l valve s fo r fre e movement . I f an y fai l t o slid e freely , se e Valv e Bod y Repai r o n pag e 14-123 .
Coa t al l part s wit h AT F befor e reassembly .
Adjus t an d selec t th e manua l valv e deten t sprin g whe n th e manua l valv e o r manua l valv e deten t sprin g i s replaced .
Se e pag e 14-160 .
CAUTION : D o no t us e a magne t t o remov e th e chec k balls ; i t ma y magnetiz e th e balls .
Disassembly/Inspection/Reassembl y
Main Valv e Bod y
ProCarManuals.com

NOTE: Al l chec k ball s ar e th e sam e siz e (7/32) #7 .
ProCarManuals.com

Disassembly/Inspection/Reassembly
Secondary Valv e Bod y
NOTE :
• Clea n al l part s thoroughl y i n solven t o r carbureto r cleaner , an d dr y wit h compresse d air .
• Blo w ou t al l passages .
• Replac e valv e bod y a s a n assembl y i f an y part s ar e wor n o r damaged .
• Chec k al l valve s fo r fre e movement . I f an y fai l t o slid e freely , se e Valv e Bod y Repai r o n pag e 14-123 .
• Coa t al l part s wit h AT F befor e reassembly .
CAUTION : D o no t us e a magne t t o remov e th e chec k balls ; i t ma y magnetiz e th e balls .
ProCarManuals.com

NOTE: All check balls are the same size (7/32) #7.ProCarManuals.com

Disassembly/Inspection/Reassembly
Servo Body/Throttl e Valv e Bod y
NOTE :
Clea n al l part s thoroughl y i n solven t o r carbureto r cleaner , an d dr y wit h compresse d air .
Blo w ou t al l passages .
Replac e valv e bod y a s a n assembl y i f an y part s ar e wor n o r damaged .
Chec k al l valve s fo r fre e movement . I f an y fai l t o slid e freely , se e Valv e Bod y Repai r o n pag e 14-123 .
Coa t al l part s wit h AT F befor e reassembly .
Replac e th e O-rings .
ProCarManuals.com