of pre-lubricating overhauled, rebuilt or new replacement engines
cannot be over emphasized. Many of these engines are badly damaged
within the first few minutes of operation because of lack of
lubrication to vital parts.
such as pistons, rings, cylinder walls and bearings must have
immediate lubrication to prevent scuffing, scoring and bearing
damage. In some cases it can take as long as five minutes
of engine operation for the oil pump to prime itself, fill
the oil passages and oil filter, then deliver oil to the various
parts of the engine.
These unnecessary failures can be prevented
by lubricating the parts as they are assembled, then forcing
oil under pressure to the oil galleries, oil filter and oil
pump. This provides immediate lubrication to all pressure
lubricated parts and eliminates the time-lag that occurs in
the oil pump priming itself and filling the oil galleries
when the engine is first started.
pump for some engines is not self priming and when the oil pump
cover has been removed for any reason, the pump gear cavity
must be filled with petroleum jelly to aid priming.
The oiling system for any engine can
be filled by the use of a bearing leak detector, which should
hold at least two quarts of oil. Normal engine oil pressure,
or about 40 psi, should be forced to the galleries.
The oil supply line from the leak detector
can be attached to the engine at any convenient tapped hole
on the outside of the engine block that leads to the oil pressure
circulating system in the engine. Hook-up points are located
differently, according to the engine.