Piston And Rod Assembly; Base Engine Components Dodge Engine Components - Dodge D250 1990 Service Manual

Out-of-Chassis Diagnostic Procedures
Page9H-2
Base Engine Components
DODGE Engine Components
Piston and Rod Assembly
There are a number of power related problems including
excessive oil consumption, smoke, blow-by and poor
performance that can be caused by inadequate sealing
between the piston rings and the cylinder walls. A blowby
measurement can help detect the problem.
Verification of the damaged or worn component requires
visual/dimensional inspection of rings, pistons and cylinder
walls.
The cause of piston ring wear can range from wear over a long
period of service to a dust-out in a short period of time because
of poor maintenance of the air intake system.
During repair It Is essential that the cylinder wall be d e -
glazed s o that new rings will seat against the cylinder
wall. Failure of the rings to seat can result in high blow-
by and excessive oil consumption.