Jeep Cherokee 1999 Electronic Service Manual page 1094

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REM OVAL AN D I N STALLAT I ON (Cont inue d)
(13) In st a ll t h e en gin e cylin der h ea d cover a n d
ga sket .
(14) At t a ch t h e a ir con dit ion er com pr essor m ou n t -
in g br a cket t o t h e en gin e cylin der h ea d a n d block.
Tigh t en t h e bolt s t o 40 N·m (30 ft . lbs.) t or qu e.
(15) At t a ch t h e a ir con dit ion in g com pr essor t o t h e
br a cket . Tigh t en t h e bolt s t o 27 N·m (20 ft . lbs.)
t or qu e.
CAUTION: The serpentine drive belt must be routed
correctly. Incorrect routing can cause the water
pump to turn in the opposite direction causing the
engine to overheat.
(16) In st a ll t h e ser pen t in e dr ive belt a n d cor r ect ly
t en sion t h e belt (r efer t o Gr ou p 7, Coolin g Syst em for
t h e pr oper pr ocedu r e).
(17) In st a ll t h e a ir clea n er a n d du ct in g.
(18) In st a ll t h e en gin e cylin der h ea d cover.
(19) Con n ect t h e h oses t o t h e en gin e t h er m ost a t
h ou sin g a n d fill t h e coolin g syst em t o t h e specified
level (r efer t o Gr ou p 7, Coolin g Syst em s for t h e
pr oper pr ocedu r e).
(20) Th e a u t om a t ic t r a n sm ission t h r ot t le lin ka ge
a n d ca ble m u st be a dju st ed a ft er com plet in g t h e
en gin e cylin der h ea d in st a lla t ion (r efer t o Gr ou p 21,
Tr a n sm ission s for t h e pr oper pr ocedu r es).
(21) Con n ect t h e fu el lin e.
(22) Con n ect n ega t ive ca ble t o ba t t er y.
(23) Con n ect t h e u pper r a dia t or h ose a n d h ea t er
h ose a t t h e en gin e t h er m ost a t h ou sin g.
(24) F ill t h e coolin g syst em . Ch eck for lea ks.
WARNING: USE EXTREME CAUTION WHEN THE
ENGINE IS OPERATING. DO NOT STAND IN DIRECT
LINE WITH THE FAN. DO NOT PUT HANDS NEAR
THE PULLEYS, BELTS OR FAN. DO NOT WEAR
LOOSE CLOTHING.
(25) Oper a t e t h e en gin e wit h t h e r a dia t or ca p off.
In spect for lea ks a n d con t in u e oper a t in g t h e en gin e
u n t il t h e en gin e t h er m ost a t open s. Add coola n t , if
r equ ir ed.
VALVES AND VALVE SPRINGS
Th is pr ocedu r e is don e wit h t h e en gin e cylin der
h ea d r em oved fr om t h e block.
REMOVAL
(1) Rem ove t h e en gin e cylin der h ea d fr om t h e cyl-
in der block.
(2) Use Va lve
MD-998772A a n d com pr ess ea ch va lve spr in g.
(3) Rem ove t h e va lve locks, r et a in er s, spr in gs a n d
va lve st em oil sea ls. Disca r d t h e oil sea ls.
Spr in g Com pr essor
(4) Use a sm oot h st on e or a jeweler s file t o r em ove
a n y bu r r s on t h e t op of t h e va lve st em , especia lly
a r ou n d t h e gr oove for t h e locks.
(5) Rem ove t h e va lves, a n d pla ce t h em in a r a ck in
t h e sa m e or der a s r em oved.
INSTALLA TION
(1) Th or ou gh ly clea n t h e va lve st em s a n d t h e va lve
gu ide bor es.
(2) Ligh t ly lu br ica t e t h e st em .
(3) In st a ll t h e va lve in t h e or igin a l va lve gu ide
bor e.
(4) In st a ll t h e r epla cem en t va lve st em oil sea ls on
t h e va lve st em s. If t h e 0.381 m m (0.015 in ch ) over-
size va lve st em s a r e u sed, over size oil sea ls a r e
r equ ir ed.
(5) P osit ion t h e va lve spr in g a n d r et a in er on t h e
en gin e cylin der h ea d a n d com pr ess t h e va lve spr in g
wit h Va lve Spr in g Com pr essor Tool MD-998772A.
(6) In st a ll t h e va lve locks a n d r elea se t h e t ool.
(7) Ta p t h e va lve spr in g fr om side t o side wit h a
h a m m er t o en su r e t h a t t h e spr in g is pr oper ly sea t ed
a t t h e en gin e cylin der h ea d. Also t a p t h e t op of t h e
r et a in er t o sea t t h e va lve locks.
(8) In st a ll t h e en gin e cylin der h ea d.
HYDRAULIC TAPPETS
Ret a in a ll t h e com pon en t s in t h e sa m e or der a s
r em oved.
REMOVAL
(1) Rem ove t h e en gin e cylin der h ea d (Refer t o cyl-
in der h ea d r &i in t h is sect ion ).
(2) Rem ove t h e pu sh r ods.
(3) Rem ove t h e t a ppet s t h r ou gh t h e pu sh r od open -
in gs in t h e cylin der block wit h a H ydr a u lic Va lve
Ta ppet Rem ova l/In st a lla t ion Tool (F ig. 37).
Tool
Fig. 37 Hydraulic Valve Tappet Removal—
4.0L ENGINE
Installation Tool
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