Dodge D250 1990 Service Manual page 301

Out-of-Chassis Repairs
Page 91-14
Base Engine Components
DODGE Turbo Diesel
Engine Mineral
Oil Spirits
Use a drill, a fine grit Flexi-Hone and a mixture of equal parts of
mineral splits and SAE 30W engine oil to de-glaze the bores.
300 to
400 RPM
Stroke ( f + J )/Per Second -
The Crosshatch angle is a function of drill speed and how fast
the hone is moved vertically.
^ ] This illustration shows the results of the drill speed too slow or
the vertical stroke too fast.
This illustration shows the result of the drili speed too test or
the vertical stroke too slow.