Chrysler Sebring, Stratus sedan, Sebring Convertible. Manual — part 523
straight edge against the threads. If all the threads
do not contact the scale the bolt should be replaced.
(2) Before
installing
the
bolts,
lubricate
the
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)
CONNECTING ROD SIDE CLEARANCE
(1) Mount a dial indicator to a stationary point on
engine. Locate probe perpendicular to and resting
against the connecting rod cap being checked. Move
connecting rod all the way to rear of its travel. Zero
the dial indicator. Move connecting rod forward to
limit of travel and read the dial indicator (Fig. 51).
Compare measurement to specification listed in
engine specifications (Refer to 9 - ENGINE - SPECI-
FICATIONS). Repeat procedure for each connecting
rod. Turn crankshaft for connecting rod accessibility.
CRANKSHAFT
DESCRIPTION
The crankshaft is constructed of a forged micro
alloy steel. The six throw, nine counterweight crank-
shaft is supported by four select fit main bearings
with the number three serving as the thrust washer
location (Fig. 46). The select fit identification mark-
ings will be on the rear side of the number nine
(rearmost) counterweight. The six separate connect-
ing rod throws are an even-firing design which
reduces torque fluctuations while a vibration damper
is used to control torsional vibration.
The crankshaft oil seals are a one piece design.
The front seal is retained by the timing chain cover,
and the rear seal in a housing that attaches to the
cylinder block.
STANDARD PROCEDURE - CRANKSHAFT END
PLAY
(1) Mount a dial indicator to a stationary point at
front of engine. Locate the probe perpendicular
against nose of crankshaft (Fig. 52).
(2) Move crankshaft all the way to the rear of its
travel.
(3) Zero the dial indicator.
(4) Move crankshaft all the way to the front and
read the dial indicator. For crankshaft end play clear-
ances (Refer to 9 - ENGINE - SPECIFICATIONS).
REMOVAL
(1) Remove engine from vehicle (Refer to 9 -
ENGINE - REMOVAL).
(2) Mount engine on an engine stand.
Fig. 49 Checking Connecting Rod Bearing
Clearance—Typical
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
Fig. 51 Connecting Rod Side Clearance Measuring
JR
ENGINE 2.7L DOHC
9 - 195
CONNECTING ROD BEARINGS (Continued)
(3) Drain engine oil and remove oil filter.
(4) Remove oil pan and oil pick-up tube (Refer to 9
- ENGINE/LUBRICATION/OIL PAN - REMOVAL).
(5) Remove idler pulley bracket for accessory drive
belt.
(6) Remove upper intake manifold (Refer to 9 -
ENGINE/MANIFOLDS/INTAKE
MANIFOLD
-
REMOVAL).
(7) Remove cylinder head covers (Refer to 9 -
ENGINE/CYLINDER
HEAD/CYLINDER
HEAD
COVER(S) - REMOVAL).
(8) Remove timing chain cover (Refer to 9 -
ENGINE/VALVE TIMING/TIMING CHAIN COVER -
REMOVAL).
(9) Remove primary timing chain (Refer to 9 -
ENGINE/VALVE
TIMING/TIMING
CHAIN
AND
SPROCKETS - REMOVAL).
(10) Remove crankshaft sprocket (Refer to 9 -
ENGINE/VALVE
TIMING/TIMING
CHAIN
AND
SPROCKETS - REMOVAL).
(11) Remove oil pump (Refer to 9 - ENGINE/LU-
BRICATION/OIL PUMP - REMOVAL).
(12) Remove crankshaft rear oil seal retainer
(Refer to 9 - ENGINE/ENGINE BLOCK/CRANK-
SHAFT REAR OIL SEAL RETAINER - REMOVAL).
(13) Remove structural windage tray (Fig. 53).
(14) Turn crankshaft until connecting rod cap to be
removed is accessible.
NOTE: Connecting rod bearing caps are not inter-
changeable and should be marked before removing
to ensure correct reassembly.
CAUTION: DO NOT use a number stamp or a punch
to mark connecting rods. Damage to connecting
rod could occur.
(15) Mark connecting rod bearing cap positions
using a permanent ink marker or scribe tool.
(16) Remove connecting rod bearing caps. Use care
to prevent damage to the crankshaft bearing sur-
faces.
CAUTION: Care should be taken not to damage the
fractured rod and cap joint face surfaces or damage
to the engine may occur.
(17) Remove main bearing cap bolts and tie bolts
(Fig. 54).
(18) Remove main bearing caps (Fig. 54).
CAUTION: When removing crankshaft, use care not
to damage bearing surfaces on the crankshaft
(19) Remove crankshaft from cylinder block (Fig.
55).
Fig. 52 CHECKING CRANKSHAFT END PLAY
Fig. 53 Windage Tray
1 - STRUCTURAL WINDAGE TRAY
Fig. 54 Main Bearing Cap Identification
1 - TIE BOLTS
2 - TIE BOLTS
9 - 196
ENGINE 2.7L DOHC
JR
CRANKSHAFT (Continued)
INSTALLATION
NOTE: Upper and lower bearing halves are NOT
interchangeable.
CAUTION: Main bearings are select fit (Refer to 9 -
ENGINE/ENGINE
BLOCK/CRANKSHAFT
MAIN
BEARINGS - STANDARD PROCEDURE).
(1) Lubricate upper main bearing halves with
engine oil (Fig. 56).
CAUTION: When installing crankshaft, use care not
to damage bearing surfaces on the crankshaft.
(2) Install crankshaft (Fig. 55).
NOTE: Make sure that the coated and oil groove
side of crankshaft thrust washer faces the crank-
shaft thrust surface.
(3) Push crankshaft forward. Lubricate and install
the front thrust washer by rolling the thrust washer
Fig. 55 CYLINDER BLOCK AND CRANKSHAFT
1 - MAIN CAP BOLT—VERTICAL
2 - MAIN CAP
3 - MAIN BEARING—LOWER
4 - MAIN BEARING—UPPER
5 - MAIN CAP BOLT —HORIZONTAL
6 - CYLINDER BLOCK
7 - CRANKSHAFT
Fig. 56 Main Bearing Identification
JR
ENGINE 2.7L DOHC
9 - 197
CRANKSHAFT (Continued)
onto the machined shelf between the No. 3 upper
main bulk head and crankshaft thrust surface (Fig.
57).
(4) Move
crankshaft
rearward.
Lubricate
and
install the rear thrust washer by rolling the thrust
washer onto the machined shelf between the No. 3
upper main bulk head and crankshaft thrust surface.
(5) Lubricate lower main bearings with engine oil.
(6) Install main bearings and caps.
NOTE: Lubricate main bearing cap bolts with
engine oil before installation.
The main bearing cap bolts must be tightened in
the proper sequence. First the inner main cap bolts,
secondly the windage tray bolts, and lastly the main
cap tie (horizontal) bolts.
(7) Install the inside main bearing cap bolts and
tighten to 20 N·m + 1/4 Turn (15 ft. lbs. + 1/4 Turn)
(Fig. 54).
(8) Measure crankshaft end play (Refer to 9 -
ENGINE/ENGINE BLOCK/CRANKSHAFT - STAN-
DARD PROCEDURE).
(9) Install connecting rods and measure side clear-
ance (Refer to 9 - ENGINE/ENGINE BLOCK/CON-
NECTING
ROD
BEARINGS
-
STANDARD
PROCEDURE).
(10) Install windage tray (Fig. 53). Lubricate bolts
with engine oil and tighten to 27 N·m + 1/4 Turn (20
ft. lbs. + 1/4 turn).
(11) Install the main cap tie (horizontal) bolts and
tighten to 28 N·m (250 in. lbs.) (Fig. 54).
(12) Install rear crankshaft oil seal retainer and
oil seal (Refer to 9 - ENGINE/ENGINE BLOCK/
CRANKSHAFT REAR OIL SEAL RETAINER -
INSTALLATION) (Refer to 9 - ENGINE/ENGINE
BLOCK/CRANKSHAFT
OIL
SEAL
-
REAR
-
INSTALLATION).
(13) Install oil pump assembly (Refer to 9 -
ENGINE/LUBRICATION/OIL PUMP - INSTALLA-
TION).
(14) Install crankshaft sprocket (Refer to 9 -
ENGINE/VALVE
TIMING/TIMING
CHAIN
AND
SPROCKETS - INSTALLATION).
(15) Install timing chain (Refer to 9 - ENGINE/
VALVE TIMING/TIMING CHAIN AND SPROCKETS
- INSTALLATION).
(16) Install timing chain cover (Refer to 9 -
ENGINE/VALVE TIMING/TIMING CHAIN COVER -
INSTALLATION).
(17) Install cylinder head covers (Refer to 9 -
ENGINE/CYLINDER
HEAD/CYLINDER
HEAD
COVER(S) - INSTALLATION).
(18) Install idler pulley bracket for accessory drive
belt.
(19) Install oil pick-up tube and O-ring.
(20) Install oil pan and oil filter (Refer to 9 -
ENGINE/LUBRICATION/OIL
PAN
-
INSTALLA-
TION).
(21) Install oil dipstick tube.
(22) Install engine assembly (Refer to 9 - ENGINE
- INSTALLATION).
(23) Fill engine crankcase with proper oil to cor-
rect level (Refer to 9 - ENGINE/LUBRICATION/OIL
- STANDARD PROCEDURE).
CRANKSHAFT MAIN
BEARINGS
STANDARD PROCEDURE - CRANKSHAFT MAIN
BEARING FITTING
The main bearings are “select fit” to achieve proper
oil clearances. For main bearing selection, the block
and crankshaft have grade identification marks.
The grade marks for the cylinder block main bear-
ing bore grade is located on the pan rail just below
the left side engine mount bracket (Fig. 59). These
marks are read left to right, corresponding 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. 58). The crankshaft journal grade marks are
read left to right, corresponding with journal number
1, 2, 3, 4.
Refer
to
the
MAIN
BEARING
SELECTION
CHART—2.7L to properly select the main bearings.
For an example, if the main bore grade is 3 and the
journal grade is 2, the proper select fit bearing would
be (2) +0.003 mm (+0.0002 in.).
Fig. 57 Thrust Washer - Installation
1 - FRONT THRUST WASHER
9 - 198
ENGINE 2.7L DOHC
JR
CRANKSHAFT (Continued)
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