TM10-3950-672-24-2
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.
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.
Oil Leaks
Various gaskets, seals and plugs are used to contain the
oil.
Most leaks can be identified during routine
inspection of the engine and vehicle.
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.
Oil blowing out the breather of a four-cylinder engine is
a good sign of a blown plug.
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