Chrysler Sebring 2004 Service Manual page 1113

9 - 186 ENGINE 2.7L DOHC
CONNECTING ROD BEARINGS
STANDARD PROCEDURE - CONNECTING ROD
AND BEARING FITTING
CONNECTING ROD BEARING
Fit all connecting rods on one bank until complete.
The bearing caps are not interchangeable and
should be marked at removal to ensure correct
assembly.
CAUTION: Care must be taken not to damage the
fractured rod and cap joint face surfaces as engine
damage may occur.
The bearing shells must be installed with the
tangs inserted into the machined grooves in the rods
and caps. Also, assure that the hole in upper bearing
half aligns with oil squirt hole in rod. Install cap
with the tangs on the same side as the rod.
CAUTION: Assure that hole in upper bearing half
aligns with hole in connecting rod as engine dam-
age may occur.
Limits of taper or out-of-round on any crankshaft
journals should be held to 0.015 mm (0.0006 in.).
Bearings are available 0.025 mm (0.001 in.) and
0.250 mm (0.010 in.) undersize. Install the bear-
ings in pairs. Do not use a new bearing half
with an old bearing half. Do not file the rods or
bearing caps.
(1) For measuring Main Bearing Clearance and
Connecting Rod Bearing Clearance use plastigage
(Fig. 49). For more information on using plastigage
(Refer to 9 - ENGINE - STANDARD PROCEDURE).
Refer to Engine Specifications for bearing clearance
specifications (Refer to 9 - ENGINE - SPECIFICA-
TIONS).
CONNECTING ROD BOLTS
NOTE: The connecting rod bearing cap bolts must
be examined before reuse. If the threads are necked
down due to stretching, the bolt(s) must be
replaced (Fig. 50).
NOTE: Connecting rod bolts are retained in the rod
cap with a light press fit. If bolts are to be removed,
use a hammer and punch to drive bolts from con-
necting rod cap using care not to damage fractured
cap surface.
Fig. 49 Checking Connecting Rod Bearing
Clearance—Typical
(1) Examine connecting rod bolt for stretching.
Stretching can be checked by holding a scale or
straight edge against the threads. If all the threads
do not contact the scale the bolt should be replaced.
(2) Before installing
threads with engine oil.
(3) Install bolts finger tight. Then alternately
torque each nut to assemble the cap properly.
(4) Tighten the nuts to specification. (Refer to 9 -
ENGINE - SPECIFICATIONS)
Fig. 50 Check for Stretched Bolts
1 - STRETCHED BOLT
2 - THREADS ARE NOT STRAIGHT ON LINE
3 - THREADS ARE STRAIGHT ON LINE
4 - UNSTRETCHED BOLT
the bolts, lubricate
JR
the