Jeep Cherokee 1999, Electronic Service Manual

Page: 1053 / 1948

(4) 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 h ea d wit h a H ydr a u lic Va lve
Ta ppet Rem ova l/In st a lla t ion Tool (F ig. 38).
INSTALLATION
It is n ot n ecessa r y t o ch a r ge t h e t a ppet s wit h
en gin e oil. Th ey will ch a r ge t h em selves wit h in a ver y
sh or t per iod of en gin e oper a t ion .
(1) Dip ea ch t a ppet in Mopa r E n gin e Oil Su pple-
m en t , or equ iva len t .
(2) Use H ydr a u lic Va lve Ta ppet Rem ova l/In st a lla -
t ion Tool t o in st a ll ea ch t a ppet in t h e sa m e bor e fr om
wh er e it wa s or igin a lly r em oved.
(3) In st a ll t h e pu sh r ods in t h eir or igin a l loca t ion s.
(4) In st a ll t h e r ocker a r m s a n d br idge a n d pivot
a ssem blies a t t h eir or igin a l loca t ion s. Loosely in st a ll
t h e ca pscr ews a t ea ch br idge.
(5) Tigh t en t h e ca pscr ews a lt er n a t ely, 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. Tigh t en t h e
ca pscr ews t o 28 N·m (21 ft . lbs.) t or qu e.
(6) In st a ll t h e en gin e cylin der h ea d cover.
VIBRATION DAMPER
REMOVAL
(1) Discon n ect n ega t ive ca ble fr om ba t t er y.
(2) Rem ove t h e ser pen t in e dr ive belt a n d fa n
sh r ou d.
(3) Rem ove t h e vibr a t ion da m per r et a in in g bolt
a n d wa sh er.
(4) Use Vibr a t ion Da m per Rem ova l Tool 7697 t o
r em ove t h e da m per fr om t h e cr a n ksh a ft (F ig. 39).
INSTALLATION
(1) Apply Mopa r Silicon e Ru bber Adh esive Sea la n t
t o t h e keywa y in t h e cr a n ksh a ft a n d in ser t t h e key.
Wit h t h e key in posit ion , a lign t h e keywa y on t h e
vibr a t ion da m per h u b wit h t h e cr a n ksh a ft key a n d
t a p t h e da m per on t o t h e cr a n ksh a ft .
(2) In st a ll t h e vibr a t ion da m per r et a in in g bolt a n d
wa sh er.
(3) Tigh t en t h e da m per r et a in in g bolt t o 108 N·m
(80 ft . lbs.) t or qu e.
(4) In st a ll t h e ser pen t in e dr ive belt a n d t igh t en t o
t h e specified t en sion (r efer t o Gr ou p 7, Coolin g Sys-
t em s for t h e pr oper specifica t ion s a n d pr ocedu r es).
(5) Con n ect n ega t ive ca ble t o ba t t er y.
TIMING CASE COVER OIL SEAL
REMOVAL
Th is pr ocedu r e is don e wit h t h e t im in g ca se cover
in st a lled.
(1) Discon n ect n ega t ive ca ble fr om ba t t er y.
(2) Rem ove t h e ser pen t in e dr ive belt .
(3) Rem ove t h e vibr a t ion da m per.
(4) Rem ove t h e r a dia t or sh r ou d.
(5) Ca r efu lly r em ove t h e oil sea l. Ma ke su r e sea l
bor e is clea n .
INSTALLATION
(1) P osit ion t h e r epla cem en t oil sea l on Tim in g
Ca se Cover Align m en t a n d Sea l In st a lla t ion Tool
6139 wit h sea l open en d fa cin g in wa r d. Apply a ligh t
film of P er fect Sea l, or equ iva len t , on t h e ou t side
dia m et er of t h e sea l. Ligh t ly coa t t h e cr a n ksh a ft wit h
en gin e oil.
(2) P osit ion t h e t ool a n d sea l over t h e en d of t h e
cr a n ksh a ft a n d in ser t a dr a w scr ew t ool in t o Sea l
In st a lla t ion Tool 6139 (F ig. 40). Tigh t en t h e n u t
a ga in st t h e t ool u n t il it con t a ct s t h e cover.
Fig. 38 Hydraulic Valve Tappet Removal/Installation
Tool
Fig. 39 Vibration Damper Removal Tool 7697
9 - 36 2.5L ENGINE X J
REM OVAL AN D I N STALLAT I ON (Cont inue d)