Chrysler Sebring 2005 Service Manual page 1263

9 - 194 ENGINE 2.7L DOHC
ENGINE BLOCK (Continued)
INSPECTION
ENGINE BLOCK
(1) Clean cylinder block thoroughly and check all
core hole plugs for evidence of leaking.
(2) If new core plugs are to be installed, (Refer to 9
- ENGINE - STANDARD PROCEDURE - ENGINE
CORE AND OIL GALLERY PLUGS).
(3) Examine block and cylinder bores for cracks or
fractures.
(4) Check block deck surfaces for flatness. Deck
surface must be within service limit of 0.1 mm (0.004
in.).
CYLINDER BORE
NOTE: The cylinder bores should be measured at
normal room temperature, 21°C (70°F).
The cylinder walls should be checked for out-of-
round and taper with Tool C119 or equivalent (Fig.
48) (Refer to 9 - ENGINE - SPECIFICATIONS). If
the cylinder walls are badly scuffed or scored, the
cylinder block should be replaced, and new pistons
and rings fitted.
Fig. 48 Checking Cylinder Bore Size
Measure the cylinder bore at three levels in direc-
tions A and B (Fig. 48). Top measurement should be
10 mm (3/8 in.) down and bottom measurement
should be 10 mm (3/8 in.) up from bottom of bore.
(Refer to 9 - ENGINE - SPECIFICATIONS).
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. In s ta ll th e be a r-
in g s in p a irs . D o n o t u s e a n e w be a rin g h a lf
w ith a n o ld be a rin g h a lf. D o n o t file th e ro d s o r
be a rin g c a p s .
(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.
(1) Examine connecting rod bolt for stretching.
Stretching can be checked by holding a scale or
JR