Engine
Lubricating System
Page9B-12
Base
Engine Components
DODGE
Turbo Diesel
j^j^ Lift Pump Leakage
There is a remote possibility for fuel to drain
into
the oil
from
the
lift
pump.
For
this to happen, the diaphragm in the pump would have to
break and the drain hole would have to be plugged.
Cylinder Head Leakage
Another remote possibility, is a crack or porosity in the head
casting
could allow fuel to leak to the air intake and on to the
cylinders.
®
A
blown cup plug can allow a relative large
quantity
of oil to
escape
resulting in a sudden drop in the oil pressure.
When checking for
such
a leak, be sure to check the plug
behind the
tappet
cover as well as those
that
may be obscured
by
chassis
parts.
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