Rocker Lever, Valve Stem, Push Rod, Tappet And Camshaft - Dodge D250 1990 Service Manual

Base Engine Components
DODGE Turbo Diesel
In-Chassis Diagnostic Procedures
Page 9E-5
Rocker Lever, Valve Stem, Push Rod, Tappet
and Camshaft
Excessive valve lash can indicate a worn valve stem or rocker
lever.
Loose rocker levers and the need to re-set the valve clearance f^fS
frequently, can also indicate cam lobe or tappet wear. If an
inspection of the levers, valve stems and push rods does not
show wear, tappet and/or cam lobe wear can be suspected.
Caution: Anytime a new camshaft Is Installed, new
tappets must also be installed.
The camshaft should be removed from the block to properly
inspect the lobes. Tappets must also be removed to inspect the
faces.
A severely damaged camshaft journal (s) can generate metal
chips which will be found in the pan and filter. As the clearance
in the journal(s) increases, a small reduction in oil pressure
may be detected.