LUBRICATING OIL COOLER BYPASS VALVE
Clean the bypass valve components with fuel oil and dry
To assure proper lubrication if the oil cooler core
them with compressed air.
becomes clogged, a valve, located between the oil inlet
and the core, bypasses the oil around the cooler directly
Inspect the valve parts for wear and replace the parts if
to the oil gallery in the cylinder block.
The oil cooler is mounted at the side of the engine and
the bypass valve, spring, plug and gasket are housed in
Install Bypass Valve.
the oil cooler adaptor (Fig. 1).
Apply clean engine oil to the outside surface of
The bypass valve should be removed, cleaned and
the bypass valve and place the valve in the adaptor,
reassembled whenever the cooler core is cleaned or
closed end first.
replaced. However, if occasion requires, the bypass
valve can be removed without removing the oil cooler.
Slide the valve spring into the valve and screw
the plug, with the gasket, into the adaptor.
Remove Bypass Valve
The bypass valve may be removed by removing the
plug and lifting the gasket, valve and spring from the
adaptor (Fig. 1).