Method of modifying an engine oil cooling system

A method of modifying an original equipment oil cooling system for a vehicle having a diesel engine, the diesel engine having an oil system with an oil pump, oil passageways and an oil outlet port, the engine further having a water cooling system with a water pump, water passageways and a water outlet port, the engine having an original equipment liquid-to-liquid heat exchanger in which heat from the oil is transferred to the water cooling system of the engine, the original equipment liquid-to-liquid heat exchanger being installed in the engine and having a predetermined mounting configuration, the original equipment liquid-to-liquid heat exchanger further comprising an oil inlet, an oil outlet, a water inlet, and a water outlet, each in a predetermined location, the oil outlet port of the engine conveying a flow of oil to the oil inlet of the original equipment liquid-to-liquid heat exchanger, and the water outlet port of the engine conveying a flow of water to the water inlet of the original equipment liquid-to-liquid heat exchanger, the method comprising:

• (a) removing the original equipment liquid-to-liquid heat exchanger from the engine;
• (b) attaching an adaptor to the engine, the adaptor having an oil passageway, the adaptor being configured such that when the adaptor is in the installed position, the oil passageway of the adaptor receives the flow of oil from the oil outlet port of the engine and conveys the flow of oil to an external oil cooling heat exchanger, the adaptor further comprising a water passageway, the adaptor being configured such that when the adaptor is in the installed position, the water passageway of the adaptor receives a flow of water from the water outlet port of the engine and conveys the entirety of the flow of water back to the water cooling system of the engine;
• and
• (c) mounting the external oil cooling heat exchanger in a location different from the location of the original equipment liquid-to-liquid heat exchanger so that the external oil cooling heat exchanger receives the flow of oil from the adaptor and cools the flow of oil prior to retuning the flow of oil to the engine.