Jeep Cherokee 1999 Electronic Service Manual page 1052

X J
REM OVAL AN D I N STALLAT I ON (Cont inue d)
Fig. 37 Engine cylinder head Bolt Tightening Sequence
(11) Con n ect t h e coola n t t em per a t u r e sen din g u n it
con n ect or.
(12) In st a ll t h e spa r k plu gs a n d t igh t en t o 37 N·m
(27 ft . lbs.) t or qu e. Con n ect t h e ign it ion wir es.
(13) In st a ll t h e in t a ke a n d exh a u st m a n ifolds
(r efer t o Gr ou p 11, E xh a u st Syst em a n d In t a ke Ma n -
ifold for t h e pr oper pr ocedu r es).
(14) In st a ll t h e fu el su pply lin e. P u sh u n t il a
"click" is h ea r d. Rein st a ll la t ch clip.
(15) If equ ipped, a t t a ch t h e power st eer in g pu m p
a n d br a cket .
(16) In st a ll t h e pu sh r ods, r ocker a r m s, pivot s a n d
br idges in t h e or der t h ey wer e r em oved.
(17) In st a ll t h e en gin e cylin der h ea d cover.
(18) At t a ch t h e a ir con dit ion in g 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.
(19) 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 accessory drive belt must be routed
correctly. Incorrect routing can cause the water
pump to turn in the opposite direction causing the
engine to overheat.
(20) In st a ll t h e a ccessor y 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).
(21) In st a ll t h e a ir clea n er a n d du ct in g.
(22) Con n ect t h e h oses t o t h 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 oce-
du r e).
(23) In st a ll t h e coola n t t em per a t u r e sen din g u n it
con n ect or.
(24) Con n ect n ega t ive ca ble t o ba t t er y.
(25) 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 t h er m ost a t h ou sin g.
(26) 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.
(27) 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 t h er m ost a t open s. Add coola n t , if r equ ir ed.
CYLINDER HEAD
DISASSEMBL Y
(1) Use Va lve
MD-998772A a n d com pr ess ea ch va lve spr in g.
(2) 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.
(3) Use a n Ar ka n sa s 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.
(4) 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.
ASSEMBL Y
(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.
HYDRAULIC TAPPETS
REMOVAL
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.
(1) Rem ove t h e en gin e cylin der h ea d cover (r efer t o
pr ocedu r e ea r lier in t h is sect ion ).
(2) Rem ove t h e br idge a n d pivot a ssem blies a n d
r ocker a r m s by r em ovin g t h e ca pscr ews a t ea ch
br idge. Alt er n a t ely loosen ea ch ca pscr ew, on e t u r n a t
a t im e, t o a void da m a gin g t h e br idges.
(3) Rem ove t h e pu sh r ods.
2.5L ENGINE
Spr in g Com pr essor
9 - 35
Tool