Jeep Cherokee 1999 Electronic Service Manual page 1083

9 - 66 4.0L ENGINE
SERV I CE PROCEDU RES (Cont inue d)
in ch ) a n d wit h in t h e specifica t ion . A 0.051 m m (0.002
in ch ) u n der size bea r in g in ser t a n d a 0.0254 m m
(0.001 in ch ) u n der size in ser t wou ld r edu ce t h e or igi-
n a l clea r a n ce a n a ddit ion a l 0.0127 m m (0.0005 in ch ).
Th e clea r a n ce wou ld t h en be 0.0381 m m (0.0015
in ch ).
CAUTION: Never use a pair of inserts that differ
more than one bearing size as a pair.
F OR EXAMP LE: DO NOT u se a st a n da r d size
u pper in ser t a n d a 0.051 m m (0.002 in ch ) u n der size
lower in ser t .
If t h e clea r a n ce exceeds specifica t ion u sin g a pa ir
of 0.051 m m (0.002 in ch ) u n der size bea r in g in ser t s,
m ea su r e cr a n ksh a ft
m icr om et er. If t h e jou r n a l dia m et er is cor r ect , t h e
cr a n ksh a ft bor e in t h e cylin der block m a y be m is-
a lign ed, wh ich r equ ir es cylin der block r epla cem en t or
m a ch in in g t o t r u e bor e.
Repla ce t h e cr a n ksh a ft or gr in d t o a ccept t h e
a ppr opr ia t e u n der size bea r in g in ser t s if:
• J ou r n a l dia m et er s 1 t h r ou gh 6 a r e less t h a n
63.4517 m m (2.4981 in ch es)
jou r n a l dia m et er wit h
• J ou r n a l 7 dia m et er is less t h a n 63.4365 m m
(2.4975 in ch es).
On ce t h e pr oper clea r a n ces h a ve been obt a in ed,
pr oceed t o Cr a n ksh a ft Ma in Bea r in g—In st a lla t ion .
MAIN BEARING JOURNAL DIAMETER
(CRANKSHAFT REMOVED)
Rem ove t h e cr a n ksh a ft fr om t h e cylin der block
(r efer t o Cylin der Block - Disa ssem ble).
Clea n t h e oil off t h e m a in bea r in g jou r n a l.
Det er m in e t h e m a xim u m dia m et er of t h e jou r n a l
wit h a m icr om et er. Mea su r e a t t wo loca t ion s 90°
a pa r t a t ea ch en d of t h e jou r n a l.
Th e m a xim u m a llowa ble t a per a n d ou t of r ou n d is
0.013 m m (0.0005 in ch ). Com pa r e t h e m ea su r ed
a
dia m et er wit h t h e jou r n a l dia m et er specifica t ion
(Ma in Bea r in g F it t in g Ch a r t ). Select in ser t s r equ ir ed
t o obt a in t h e specified bea r in g-t o-jou r n a l clea r a n ce.
In st a ll t h e cr a n ksh a ft in t o t h e cylin der block (r efer
t o Cylin der Block - Assem ble a n d Cr a n ksh a ft Ma in
Bea r in gs - In st a lla t ion ).
X J