Chrysler Pacifica. Manual — part 676
(4) Remove front timing belt cover (Refer to 9 -
ENGINE/VALVE TIMING/TIMING BELT / CHAIN
COVER(S) - REMOVAL).
(5) Remove timing belt and tensioner (Refer to 9 -
ENGINE/VALVE
TIMING/TIMING
BELT/CHAIN
AND SPROCKETS - REMOVAL).
(6) Remove crankshaft sprocket (Refer to 9 -
ENGINE/VALVE
TIMING/TIMING
BELT/CHAIN
AND SPROCKETS - REMOVAL).
(7) Tap dowel pin out of crankshaft.
(8) Remove oil pump assembly (Refer to 9 -
ENGINE/LUBRICATION/OIL PUMP - REMOVAL).
(9) Remove crankshaft rear oil seal retainer (Fig.
79).
WARNING: DO NOT use a metal stamp to mark the
bearing caps. Do Use a scribe or paint mark
(10) Remove connecting rod bearing caps. Connect-
ing rod bearing caps are not interchangeable and
should be paint marked or scribed before removal to
insure correct assembly (Fig. 80) (Fig. 82).
(11) Remove main bearing caps. Main bearing caps
are not interchangeable and are marked to insure
correct assembly (Fig. 81). (Fig. 82)
(12) Remove crankshaft from cylinder block (Fig.
82).
NOTE: Before installing crankshaft, refer to Fitting
Main Bearings and Installation of Connecting Rod
Bearings. (Refer to 9 - ENGINE/ENGINE BLOCK/
CRANKSHAFT MAIN BEARINGS - STANDARD PRO-
CEDURE) (Refer to 9 - ENGINE/ENGINE BLOCK/
CONNECTING
ROD
BEARINGS
-
STANDARD
PROCEDURE)
INSPECTION
The crankshaft journals should be checked for
excessive wear, taper and scoring. Limits of taper on
any crankshaft journals should be held to 0.015 mm
(0.0006 in.). Limits for journal roundness should be
0.010 mm (0.0004 in.). Journal grinding should not
exceed 0.254 mm (0.010 in.) under the standard jour-
Fig. 79 REAR CRANKSHAFT OIL SEAL AND
RETAINER
1 - REAR OIL SEAL AND RETAINER ASSEMBLY
2 - BOLT
3 - ALIGNMENT DOWEL
Fig. 80 CONNECTING ROD TO CYLINDER
IDENTIFICATION
1 - PAINT MARK OR SCRIBE
Fig. 81 Main Bearing Cap Identification
CS
ENGINE 3.5L
9 - 59
CRANKSHAFT (Continued)
nal diameter. DO NOT grind thrust faces of Number
2 main bearing. DO NOT nick crank pin or bearing
fillets. After grinding, remove rough edges from
crankshaft oil holes and clean out all passages.
CAUTION: With a forged steel crankshaft it is
important that the final paper or cloth polish after
any journal regrind be in the same direction as nor-
mal rotation in the engine.
INSTALLATION
CAUTION: Main bearings are select fit (Refer to 9 -
ENGINE/ENGINE
BLOCK/CRANKSHAFT
MAIN
BEARINGS - STANDARD PROCEDURE) for proper
bearing size selection.
(1) Install crankshaft upper main bearings in cyl-
inder block. Ensure oil holes in bearings line up with
oil holes in cylinder block (Fig. 83). (Refer to 9 -
ENGINE/ENGINE
BLOCK/CRANKSHAFT
MAIN
BEARINGS - STANDARD PROCEDURE)
(2) Install the crankshaft to cylinder block. (Fig.
82)
Fig. 82 Cylinder Block and Crankshaft
1 - MAIN CAP BOLT - VERTICAL
5 - CYLINDER BLOCK
2 - MAIN CAP
6 - MAIN CAP BOLT - HORIZONTAL
3 - MAIN BEARING - LOWER
7 - CRANKSHAFT THRUST WASHER
4 - MAIN BEARING - UPPER
8 - CRANKSHAFT
Fig. 83 Main Bearing Identification
9 - 60
ENGINE 3.5L
CS
CRANKSHAFT (Continued)
(3) Move crankshaft forward to limit of travel.
Lubricate and install the front thrust washer by roll-
ing the washer onto the machined shelf between the
No. 2 upper main bulk head and crankshaft thrust
surface (Fig. 84).
(4) Move crankshaft rearward to limit of travel.
Lubricate and install the rear thrust washer by roll-
ing the washer onto the machined shelf between the
No. 2 upper main bulk head and crankshaft thrust
surface (Fig. 84).
(5) Install lower main bearings into main bearing
caps.
(6) Lubricate lower main bearings with clean
engine oil.
NOTE: Lubricate main bearing cap bolts with
engine oil before installation.
(7) Install each main cap and tighten bolts finger
tight.
The main bearing cap bolts must be tightened in
the proper sequence. First the inner main cap bolts,
secondly the windage tray bolts, lastly the main cap
tie (horizontal) bolts.
(8) Install the inside main bearing cap bolts and
tighten to 20 N·m + 1/4 turn (15 ft. lbs. + 1/4 turn).
(9) Measure crankshaft end play. (Refer to 9 -
ENGINE/ENGINE BLOCK/CRANKSHAFT - STAN-
DARD PROCEDURE)
(10) Install connecting rods and measure side
clearance. (Refer to 9 - ENGINE/ENGINE BLOCK/
CONNECTING
ROD
BEARINGS
-
STANDARD
PROCEDURE)
(11) Install windage tray. Lubricate bolts with
engine oil. Finger tighten all bolts first, then tighten
to 28 N·m + 90° turn (20 ft. lbs. + 90° turn) begin-
ning with the inside bolts tightening outward (Fig.
78).
(12) Install the main cap tie (horizontal) bolts and
tighten to 28 N·m (250 in. lbs.).
(13) Install rear crankshaft oil seal retainer and
oil seal (Refer to 9 - ENGINE/ENGINE BLOCK/
CRANKSHAFT REAR OIL SEAL RETAINER -
INSTALLATION) and (Refer to 9 - ENGINE/EN-
GINE BLOCK/CRANKSHAFT OIL SEAL - REAR -
INSTALLATION)
(14) Install oil pump assembly (Refer to 9 -
ENGINE/LUBRICATION/OIL PUMP - INSTALLA-
TION).
(15) Install dowel pin in crankshaft (Refer to 9 -
ENGINE/ENGINE
BLOCK/CRANKSHAFT
OIL
SEAL - FRONT - INSTALLATION).
(16) Install crankshaft sprocket (Refer to 9 -
ENGINE/VALVE
TIMING/TIMING
BELT/CHAIN
AND SPROCKETS - INSTALLATION).
(17) Install timing belt and tensioner (Refer to 9 -
ENGINE/VALVE
TIMING/TIMING
BELT/CHAIN
AND SPROCKETS - INSTALLATION).
(18) Install front timing belt cover (Refer to 9 -
ENGINE/VALVE TIMING/TIMING BELT / CHAIN
COVER(S) - INSTALLATION).
(19) Install oil pickup tube and tighten bolt to 28
N·m (250 in. lbs.).
(20) Install oil pan (Refer to 9 - ENGINE/LUBRI-
CATION/OIL PAN - INSTALLATION).
(21) Install engine assembly (Refer to 9 - ENGINE
- INSTALLATION).
(22) Fill engine crankcase with proper amount of
oil.
CRANKSHAFT MAIN
BEARINGS
STANDARD PROCEDURE - CRANKSHAFT MAIN
BEARING FITTING
The main bearings are a “select fit” to achieve
proper oil clearances. For main bearing selection, the
block
and
crankshaft
have
grade
identification
marks.
The marks for the cylinder block main bore grade
are located on the left side pan rail (Fig. 85). These
grade marks (1, 2, or 3) are read left to right, corre-
sponding to main bore 1, 2, 3, 4.
The grade marks for the crankshaft are located on
the rearmost crankshaft counter weight as shown in
(Fig. 86). The crankshaft journal grade marks (A, B,
or C) are read left to right, corresponding with jour-
nal number 1, 2, 3, 4.
Refer
to
the
MAIN
BEARING
SELECTION
CHART to properly select the main bearings. For an
example, if the main bore grade is 3 and the journal
Fig. 84 Thrust Washer Installation
1 - FRONT THRUST WASHER
CS
ENGINE 3.5L
9 - 61
CRANKSHAFT (Continued)
grade is B, the proper select fit bearing would be a
(2) +0.003 mm (+0.0002 in.).
NOTE: Service main bearings have a number from
(1–5) marked in ink on the bearing surface (Fig. 87).
For verification, refer to the MAIN BEARING SELEC-
TION CHART 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.
MAIN BEARING SELECTION CHART
Main Bearing Bore Grade
Marks
1
2
3
A
(3)
Standard
(2) +005
mm
(+0.0001
in.)
(1)
+0.006
mm
(+0.0002
in.)
Crankshaft
Main Journal
Grade Marks
B
(4)
-0.005
mm
(-0.0001
in.)
(3)
Standard
(2) +005
mm
(+0.0001
in.)
C
(5)
-0.006
mm
(-0.0002
in.)
(4)
-0.005
mm
(-0.0001
in.)
(3)
Standard
Fig. 85 CYLINDER BLOCK MAIN BORE GRADE
MARKING LOCATION
Fig. 86 Crankshaft Main Journal Grade Marking
Location—Rear Of Block
Fig. 87 Main Bearing Grade Marks
1 - LOWER MAIN BEARING
2 - UPPER MAIN BEARING
3 - OIL FEED HOLE AND GROOVE
4 - GRADE SELECTION INK MARKS
9 - 62
ENGINE 3.5L
CS
CRANKSHAFT MAIN BEARINGS (Continued)
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