shells, both upper and lower, must be discarded
(h) Inspect the back of the bearing shells for
and new ones installed.
bright spots which indicate they have been moving
in their supports. If such spots are present, discard
t h e bearing shells. Also inspect connecting rod
One connecting rod shell alone should not be
bearing bores for burs and foreign particles.
replaced. If one bearing shell requires replacement,
both upper and lower shells should be installed.
(i) Measure the thickness of the bearing
s h e l l s a n d c h e c k t h e c l e a r a n c e b e t w e e n each
(4) C y l i n d e r
connecting rod crank throw and the corresponding
bearing shells. Connecting rod cap nuts must be
To avoid damage to the top land of piston, do not at
t i g h t e n e d to 40-45 foot-pounds torque with the
any time try to loosen cylinder liner by inserting a
bearing shells in place when measuring the inside
long bolt or rod through the port openings in cylinder
liner and turning the crankshaft, thus pushing the
diameter. Use a micrometer and a ball attachment.
liner up with the piston.
for measuring the shell thickness. If the standard
size bearing s h e l l s are less than 0.123 inch in
(a) R e f e r t o f i g u r e 3 - 6 3 a n d 3 - 6 4 f o r
thickness and have more than 0.006 inch clearance
removal of cylinder liner and insert.
b e t w e e n any crank thrown and its bearings, all
Figure 3-63. Cylinder liner mounted in block.