Determine Rod Bearing Clearance; Determine Main Bearing Clearance - Dodge D250 1990 Service Manual

Out-of-Chassis Repairs
Page 91-22
Base Engine Components
DODGE Turbo Diesel
©
inspect the rod and main journals for deep scores, signs of
overheating and other abnormal marks.
| h Determine Rod Bearing Clearance
Measure the crankshaft bore with the bearings Installed and the
capscrews tightened to 99 N-m [73 ft-lbs].
Record the smaller diameter.
VJ
T~T
[ ^ N ] Measure the diameter of the rod journal at the location shown.
Calculate the average diameter for each side of the journal.
A
Rod Journal Diameter Limits
mm
in
63.962
69.013
MIN
MAX
2.7150
2.7170
Out-of-Roundness: 0.050mm [0.002 inch] Maximum
Taper: 0.013mm [.0005 inch] Maximum
Bearing Clearance: 0.089mm [0.0035 inch] Maximum
(Rod inside diameter with bearings installed - Crankshaft
journal diameter.)
( ^ v ) Determine Main Bearing Clearance
Install the main bearings and measure main bearing bore
diameter with main bolts tightened to 176 N-m [130 ft-lbs].
Record for later reference.
mm
83.106
Diameter
MAX
in
3.2719