Cylinder Bores - De-Glaze - Dodge D250 1990 Service Manual

Base Engine Components
DODGE Turbo Diesel
Out-of-Chassis Repairs
Page 91-13
Inspect the tappet bores for scoring or excessive wear.
Diameter
mm
in
16.055 MAX
0.632
Cylinder Bores - De-Glaze
Note: New piston rings may not seat in glazed cylinder bores.
De-giazing gives the bore the correct surface finish required to
seat the rings. The size of the bore is not changed by proper
de-glazing.
Note: Completely disassemble engine before de-glazing
cylinders.
Glazed
De-Glazed
^ Q ^ Q @ 0 C
8
^ Q @ Q ©
C
Cover the lube holes in the top of the block with waterproof
tape.
'£3.—^ c>
(
^
A correctly de-glazed surface will have a Crosshatch
appearance with the lines at 15 to 25 degree angles with the
top of the cylinder block. 30 to 50 degrees indicates angles on
Crosshatch.