For 1990-2009 cars only
The engine oil heat exchanger is mounted to the top of the engine block, under the intake manifold flange. Oil is pumped to the oil filter, to the heat exchanger, and then to the oil passages in the engine for lubrication. The exchanger provides the following two functions:
| • | Engine coolant warms up faster than the engine oil. During cold operation, the coolant warms the oil and provides better flow during cold engine operation. |
| • | After the engine reaches normal operating temperature, the engine oil temperature will exceed the engine coolant temperature. The coolant flowing through the engine oil cooler will absorb heat from the engine oil. Cooling the engine oil extends oil life and helps reduce internal engine wear. |
