Dodge D250 1990 Service Manual page 239

In-Chassis Repairs
Page9F-lO
Base Engine Components
DODGE Turbo Diesei
Remove the cylinder head and gasket from the cylinder block.
Note: Inspect the coolant passages. A large build up of rust
and lime will require removal of the cylinder block for cleaning
in a hot tank.
Inspect the cylinder bores for damage or excessive wear.
Rotate the crankshaft so the piston is at BDC to inspect the
bores.
Measure the cylinder bores.
Limit:
- Maximum Diameter: 102.116 mm [4.0203 inch]
- Out-of-Roundness: .038 mm [.0015 inch]
• Taper: .076 mm [.003 inch] Refer to the limits for the
oversize cylinder bores.
Note: Do not proceed with in-chassis repair if the bores are
damaged or worn beyond the above limits.
Check the top surface for damage caused by the cylinder head
gasket leaking between cylinders.
Check the top surface for flatness between each cylinder.
• Top surface flatness (Maximum overall variation)
- 0.075 mm [0.003 Inch] (Maximum variation within any
50.00 mm [2.0 inch] diameter area) 0.01 mm [0.0004
inch].
Note: Do not proceed with the in-chassis overhaul If the
cylinder head surface is damaged or not flat.