Jeep Cherokee 1999 Electronic Service Manual page 1058

X J
REM OVAL AN D I N STALLAT I ON (Cont inue d)
(13) Rem ove t h e spr ocket s a n d ch a in a s a n a ssem -
bly (F ig. 51).
Fig. 51 Camshaft and Crankshaft Sprocket and
CAUTION: The following procedural step must be
accomplished to prevent the camshaft from damag-
ing the rear camshaft plug during pin installation.
(14) In spect t h e da m a ged ca m sh a ft pin .
(15) If t h e pin is a spr in g-t ype pin , r em ove t h e br o-
ken pin by in ser t in g a self-t a ppin g scr ew in t o t h e pin
a n d ca r efu lly pu llin g t h e pin fr om t h e ca m sh a ft .
(16) If t h e pin is a dowel-t ype pin , cen t er-pu n ch it .
E n su r e t h e exa ct cen t er is loca t ed wh en cen t er-
pu n ch in g t h e pin .
CAUTION: Cover the opened oil pan area to pre-
vent metal chips from entering the pan.
(17) Dr ill in t o t h e pin cen t er wit h a 4 m m (5/32
in ch ) dr ill bit .
(18) In ser t a self-t a ppin g scr ew in t o t h e dr illed pin
a n d ca r efu lly pu ll t h e pin fr om t h e ca m sh a ft .
INSTALLA TION
(1) Clea n t h e ca m sh a ft pin h ole.
(2) Com pr ess t h e cen t er of t h e r epla cem en t spr in g
pin wit h vise gr ips.
(3) Ca r efu lly dr ive t h e pin in t o t h e ca m sh a ft pin
h ole u n t il it is sea t ed.
(4) In st a ll t h e ca m sh a ft
spr ocket a n d t im in g ch a in wit h t h e t im in g m a r ks
a lign ed (F ig. 50).
(5) To ver ify cor r ect in st a lla t ion of t h e t im in g
ch a in , t u r n t h e cr a n ksh a ft t o posit ion t h e ca m sh a ft
spr ocket t im in g m a r k a s sh own in (F ig. 52). Cou n t
t h e n u m ber of ch a in pin s bet ween t h e t im in g m a r ks
of bot h spr ocket s. Th er e m u st be 20 pin s.
(6) In st a ll t h e cr a n ksh a ft oil slin ger.
Chain
spr ocket , cr a n ksh a ft
Fig. 52 Verify Crankshaft—Camshaft Installation
(7) Tigh t en t h e ca m sh a ft spr ocket bolt t o 108 N·m
(80 ft . lbs.) t or qu e.
(8) Ch eck t h e va lve t im in g.
(9) Coa t bot h sides of t h e r epla cem en t t im in g ca se
cover ga sket wit h ga sket sea ler. Apply a 3 m m (1/8
in ch ) bea d of Mopa r Silicon e Ru bber Adh esive Sea l-
a n t , or equ iva len t t o t h e join t for m ed a t t h e t im in g
ca se cover a n d cylin der block.
(10) 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.
(11) P la ce 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 of
t h e cover (F ig. 53).
Fig. 53 Timing Case Cover Alignment and Seal
Installation Tool 6139
2.5L ENGINE 9 - 41