Chrysler Sebring, Stratus sedan, Sebring Convertible. Manual — part 524
NOTE: Service main bearings have a number from
1–5 marked in ink on the bearing surface (Fig. 60).
For verification, use the MAIN BEARING SELEC-
TION CHART—2.7L for number to size identification.
The upper main bearing has a oil feed hole and a
center groove to allow lubrication of the main journal
and must be properly positioned in the block.
NOTE: Although cylinder bores are graded for size,
there is only one piston size.
MAIN BEARING SELECTION CHART—2.7L
Main Bearing Bore Grade
Mark
1
2
3
Crankshaft
Main
Journal
Grade
Mark
1
(3)
standard
(2)
+0.003
mm
(+0.0002
in.)
(1)
+0.006
mm
(+0.0003
in.)
2
(4)
-0.003
mm
(-
0.0002)
(3)
standard
(2)
+0.003
mm
(+0.0002
in.)
3
(5)
-0.006
mm
(-0.0003
in.)
(4)
-0.003
mm
(-0.0002
in.)
(3)
standard
Fig. 58 Crankshaft Main Journal Grade Marking
Location
Fig. 59 Cylinder Block Main Bore Grade Marking
Fig. 60 Main Bearing Grade Marks
1 - LOWER MAIN BEARING
2 - UPPER MAIN BEARING
3 - OIL FEED HOLE AND GROOVE
4 - GRADE SELECTION INK MARKS
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ENGINE 2.7L DOHC
9 - 199
CRANKSHAFT MAIN BEARINGS (Continued)
CRANKSHAFT OIL SEAL -
FRONT
REMOVAL
(1) Remove crankshaft vibration damper. (Refer to
9
-
ENGINE/ENGINE
BLOCK/VIBRATION
DAMPER - REMOVAL)
(2) Install Special Tool 8194, Insert into crankshaft
nose. Remove seal using Special Tool 6771, Remover
(Fig. 61).
INSTALLATION
(1) Install new seal using Special Tools 6780-2
Sleeve, 6780-1 Installer, and 8179 Stud (Fig. 62).
(2) Install crankshaft vibration damper. (Refer to 9
- ENGINE/ENGINE BLOCK/VIBRATION DAMPER -
INSTALLATION)
CRANKSHAFT OIL SEAL -
REAR
REMOVAL
(1) Remove transaxle from vehicle. (Refer to 21 -
TRANSMISSION/TRANSAXLE/AUTOMATIC - 42LE
- REMOVAL)
(2) Remove drive plate.
(3) Insert a 3/16” wide flat bladed screwdriver
between the dust lip and the metal case of the crank-
shaft seal. Angle the screwdriver (Fig. 63) through
the dust lip against the metal case of the seal. Pry
out seal.
CAUTION: Do not allow the screwdriver blade to
contact the crankshaft seal surface. Contact of the
screwdriver blade against crankshaft edge (cham-
fer) is permitted.
INSTALLATION
CAUTION: If a burr or scratch is present on the
crankshaft edge (chamfer), clean surface using 400
grit sand paper to prevent seal damage during
installation.
(1) Place Special Tool 6926-1 Guide on crankshaft
(Fig. 64). This is a pilot tool with a magnetic base.
(2) Position seal over pilot tool. Assure that lip of
seal is facing towards the crankshaft during installa-
tion. The pilot tool remains on crankshaft during seal
installation.
(3) Using Special Tool 6926-2 Installer, and C-4171
Handle (Fig. 64), drive seal into the retainer housing
until seal is flush with housing surface.
Fig. 61 Crankshaft Front Oil Seal - Removal
1 - SPECIAL TOOL 6771
Fig. 62 Crankshaft Front Oil Seal - Installation
1 - SPECIAL TOOL 6780–2
2 - SPECIAL TOOL 8179
3 - SPECIAL TOOL 6780–1
4 - SEAL
9 - 200
ENGINE 2.7L DOHC
JR
(4) Install drive plate and transaxle. (Refer to 21 -
TRANSMISSION/TRANSAXLE/AUTOMATIC - 42LE
- INSTALLATION)
CRANKSHAFT REAR OIL SEAL
RETAINER
REMOVAL
(1) Remove crankshaft rear oil seal and oil pan.
(Refer to 9 - ENGINE/ENGINE BLOCK/CRANK-
SHAFT OIL SEAL - REAR - REMOVAL) (Refer to 9 -
ENGINE/LUBRICATION/OIL PAN - REMOVAL)
(2) Remove seal retainer attaching screws (Fig.
65).
(3) Remove retainer and gasket (Fig. 65).
INSTALLATION
(1) Clean sealing surfaces and replace gasket as
needed.
(2) Install gasket and loose assemble seal retainer
to block.
NOTE: The following steps must be performed to
prevent oil leaks at sealing joints.
(3) Attach Special Tools 8225 to pan rail using the
oil pan fasteners.
NOTE: Make sure that the “2.7L” stamped on the
special tool is facing the cylinder block (flat side of
tools against pan rail).
Fig. 63 Rear Crankshaft Oil Seal Removal - Typical
1 - REAR CRANKSHAFT SEAL
2 - ENGINE BLOCK
3 - ENGINE BLOCK
4 - REAR CRANKSHAFT SEAL METAL CASE
5 - PRY IN THIS DIRECTION
6 - CRANKSHAFT
7 - SCREWDRIVER
8 - REAR CRANKSHAFT SEAL DUST LIP
9 - SCREWDRIVER
Fig. 64 Crankshaft Rear Seal - Installation
1 - C-4171 HANDLE
2 - 6926–2 INSTALLER
3 - 6926–1 GUIDE
4 - SEAL
Fig. 65 Oil Seal Retainer
1 - SCREWS (7)
2 - SEAL RETAINER
JR
ENGINE 2.7L DOHC
9 - 201
CRANKSHAFT OIL SEAL - REAR (Continued)
(4) While applying firm pressure to the seal
retainer against Special Tools 8225 (Fig. 66), tighten
seal retainer screws to 12 N·m (105 in. lbs.).
(5) Install oil pan and crankshaft rear oil seal.
(Refer to 9 - ENGINE/LUBRICATION/OIL PAN -
INSTALLATION) (Refer to 9 - ENGINE/ENGINE
BLOCK/CRANKSHAFT
OIL
SEAL
-
REAR
-
INSTALLATION)
PISTON & CONNECTING ROD
DESCRIPTION
The pistons are made of a high strength aluminum
alloy with an anodized top ring groove. Piston skirts
are coated with a solid lubricant for scuff resistance.
The connecting rods are made of powdered metal
with a “fractured cap” design. The connecting rod
attaches to the piston with a full floating pin
retained by lock rings. The piston and connecting rod
are serviced as an assembly (Fig. 67).
STANDARD PROCEDURE - FITTING PISTONS
The pistons have been cast and machined to one
size and weight. The piston and rod assemblies are
matched to weigh the same for engine balance.
Piston and cylinder wall must be clean and dry.
Piston diameter should be measured 90 degrees to
piston pin at size location shown in (Fig. 68). Cylin-
der bores should be measured halfway down the cyl-
inder bore and transverse to the engine crankshaft
center line. Refer to Engine Specifications. (Refer to 9
- ENGINE - SPECIFICATIONS) Pistons and cylin-
der bores should be measured at normal room
temperature, 70°F (21°C).
PISTON PINS
The pistons have been cast and machined to one
size and weight. The piston and rod assemblies are
matched to weigh the same for engine balance.
The piston pin is full floating and is held in place
by lock rings. Do Not switch pistons with other
Fig. 66 Seal Retainer Alignment - Typical
1 - SPECIAL TOOLS 8225
2 - SEAL RETAINER
Fig. 67 Piston and Connecting Rod
1 - “F” TOWARD FRONT OF ENGINE
2 - RING COMPRESSOR
3 - SPECIAL TOOL 8189
4 - OIL SQUIRT HOLE
Fig. 68 Piston Measurements
9 - 202
ENGINE 2.7L DOHC
JR
CRANKSHAFT REAR OIL SEAL RETAINER (Continued)
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