Chrysler 2000 LHS Owner's Manual page 979

9 - 98 3.2/3.5L ENGINE
SERVICE PROCEDURES (Continued)
Fig. 29 Check for Stretched Bolts
1 – STRETCHED BOLT
2 – THREADS ARE NOT STRAIGHT ON LINE
3 – THREADS ARE STRAIGHT ON LINE
4 – UNSTRETCHED BOLT
Fig. 30 Connecting Rod Side Clearance Measuring
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, just rear of the
left engine mount bracket (Fig. 31). These grade
marks (1, 2, or 3) 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. 32). The crankshaft journal grade marks (A, B,
or C) are read left to right, corresponding with jour-
nal number 1, 2, 3, 4.
Use the Main Bearing Selection Chart to properly
select the main bearings. For an example, if the main
bore grade is 3 and the journal 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.
33). For verification, use the Main Bearing Selection
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.
Fig. 31 Cylinder Block Main Bore Grade Marking
Fig. 32 Crankshaft Main Journal Grade Marking
Location—Rear Of Block (Inverted) View
Location
LH