Chrysler Concorde 1993 Service Manual page 442

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 impor-
tant that the final paper or cloth polish after any
journal regrind be in the same direction as normal
rotation in the engine.
Upper and lower Number 2 bearing is a three piece
clinched design with flanged halves to carry the crank-
shaft thrust loads and are NOT interchangeable with
any other bearing halves in the engine (Fig. 2). All
bearing cap bolts removed during service procedures
are to be cleaned and oiled before installation. Bearing
shells are available in standard and the following
undersizes: 0.025mm (.001 inch), .051mm (.002 inch),
.076mm (.003 inch), .254mm (.010 inch), and .305mm
(.012 inch). Never install an undersize bearing that
will reduce clearance below specifications.
Fig. 2 Main Bearing Identification
REMOVAL
(1) Remove oil pan and windage tray. Refer to pro-
cedure outlined in this section. Identify bearing caps
before removal.
(2) Remove bearing caps one at a time. Remove
upper half of bearing by inserting Special Main Bear-
ing Tool C-3059. (Fig. 3) into the oil hole of crankshaft.
(3) Slowly rotate crankshaft clockwise, forcing out
upper half of bearing shell.
INSTALLATION
Only one main bearing should be selectively
fitted while all other main bearing caps are prop-
erly tightened.
When installing a new upper bearing shell, slightly
chamfer the sharp edges from the plain side.
(1) Start bearing in place, and insert Main Bearing
Tool C-3059 into oil hole of crankshaft (Fig. 3).
Fig. 3 Removing and Installing Upper Main Bearing
With Special Tool C-3059
(2) Slowly rotate crankshaft counter-clockwise slid-
ing the bearing into position. Remove Special Main
Bearing Tool C-3059.
(3) Install each main cap and tighten bolts finger
tight.
(4) Tighten number 1, 3 and 4 main cap bolts to 41
N¼m + 1/4 Turn (30 ft. lbs.+ 1/4 Turn) (Fig. 1).
Then tighten the #3 tie bolts to 54 N¼m (40 ft. lbs.)
(Fig. 4).
(5) Rotate the crankshaft until number 6 piston is
at TDC.
(6) To ensure correct thrust bearing alignment the
following procedure must be done:
(a) Move crankshaft all the way to the rear of its
travel.
(b) Then, move crankshaft all the way to the
front of its travel.
(c) Wedge a appropriate tool between the rear of
the cylinder block and rear crankshaft counter-
weight. This will hold the crankshaft in it's most
forward position.
(d) Tighten the #2 Thrust Bearing cap bolts to
41 N¼m + 1/4 Turn (30 ft. lbs.+ 1/4 Turn). Then
tighten the #2 tie bolts to 54 N¼m (40 ft. lbs.) (Fig.
4). Remove the holding tool.
Fig. 4 Crankshaft Main Cap Tie Bolts
3.5L ENGINE 9 - 59