Jeep Cherokee 1999 Electronic Service Manual page 1096

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REM OVAL AN D I N STALLAT I ON (Cont inue d)
t h e in side of t h e cover. Su ppor t t h e cover a t t h e sea l
a r ea wh ile in st a llin g t h e sea l. F or ce it in t o posit ion
wit h Sea l In st a lla t ion Tool 6139.
(2) P osit ion t h e ga sket on t h e cylin der block.
(3) P osit ion t h e t im in g ca se cover on t h e oil pa n
ga sket a n d t h e cylin der block.
(4) In ser t Tim in g Ca se Cover Align m en t a n d Sea l
In st a lla t ion Tool 6139 in t h e cr a n ksh a ft open in g in
t h e cover (F ig. 40).
Fig. 40 Timing Case Cover Alignment and Seal
Installation Tool 6139
(5) In st a ll t h e t im in g ca se cover-t o-cylin der block
a n d t h e oil pa n -t o-t im in g ca se cover bolt s.
(6) Tigh t en t h e 1/4 in ch cover-t o-block bolt s t o 7
N·m (60 in . lbs.) t or qu e. Tigh t en t h e 5/16 in ch fr on t
cover-t o-block bolt s t o 22 N·m (192 in . lbs.) t or qu e.
Tigh t en t h e oil pa n -t o-cover 1/4 in ch bolt s t o 9.5 N·m
(84 in . lbs.) t or qu e.
(7) Rem ove t h e cover a lign m en t t ool.
(8) Apply a ligh t film of en gin e oil on t h e vibr a t ion
da m per h u b con t a ct su r fa ce of t h e sea l.
(9) 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 ser t ed in t h e keywa y in t h e cr a n k-
sh a ft , in st a ll t h e vibr a t ion da m per, wa sh er a n d bolt .
Lu br ica t e a n d t igh t en t h e bolt t o 108 N·m (80 ft . lbs.)
t or qu e.
(10) In st a ll t h e A/C com pr essor (if equ ipped) a n d
gen er a t or br a cket a ssem bly.
(11) In st a ll t h e en gin e fa n a n d h u b a ssem bly a n d
sh r ou d.
(12) In st a ll t h e ser pen t in e dr ive belt a n d t igh t en
t o obt a in t h e specified t en sion .
(13) Con n ect n ega t ive ca ble t o ba t t er y.
TIMING CHAIN AND SPROCKETS
REMOVAL
(1) Discon n ect n ega t ive ca ble fr om ba t t er y.
(2) Rem ove t h e fa n a n d sh r ou d.
(3) Rem ove t h e ser pen t in e dr ive belt .
(4) Rem ove t h e cr a n ksh a ft vibr a t ion da m per.
(5) Rem ove t h e t im in g ca se cover.
(6) Rot a t e cr a n ksh a ft u n t il t h e "0" t im in g m a r k is
closest t o a n d on t h e cen t er lin e wit h ca m sh a ft
spr ocket t im in g m a r k (F ig. 41).
Fig. 41 Crankshaft—Camshaft Alignment
(7) Rem ove t h e oil slin ger fr om t h e cr a n ksh a ft .
(8) Rem ove t h e ca m sh a ft spr ocket bolt a n d
wa sh er (F ig. 42).
Fig. 42 Camshaft Sprocket and Thrust Plate
(9) Rem ove t h e cr a n ksh a ft
spr ocket a n d t im in g ch a in a s a n a ssem bly.
(10) In st a lla t ion of t h e t im in g ch a in wit h t h e t im -
in g m a r ks on t h e cr a n ksh a ft a n d ca m sh a ft spr ocket s
pr oper ly a lign ed en su r es cor r ect va lve t im in g. A wor n
or st r et ch ed t im in g ch a in will a dver sely a ffect va lve
4.0L ENGINE 9 - 79
spr ocket , ca m sh a ft