This type of design is most commonly used on high speed diesel engines that are known to require engine oil cooling capacity in the early stages of the engine design.  As new diesel engines become more efficient the need for engine mounted oil coolers continues to grow.

This type of engine oil cooler is designed to be mounted directly onto the engine block.  The oil flow is as follow: engine oil leaves the engine and enters the oil cooler, circulates through the oil cooler, exits oil cooler and re-enters the engine.  The cold fluid can either be routed to the heat exchanger in 2 ways: 1) fed from the radiator circuit through flexible lines or, 2) fed directly into the heat exchanger from the engine block, eliminating the need for additional lines.  Optimal performance will be achieved when the hot oil and cold fluid (glycol/water mixture) have the greatest inlet temperature difference.

Most common applications for this design can be found on high speed diesel passenger cars.  Very popular in European engine designs. 

To the left are the various styles of engine mounted engine oil coolers that we currently manufacture.  Each design is tailored to a certain type of application.