Coolant is directed out of the crankcase and into the oil filter base at the front of the engine.
The oil filter base routes the coolant into the front of the oil cooler then toward the back of the engine.
Once the coolant has passed through the oil cooler it is directed out of the oil filter base to the EGR cooler.
Note: There are weep holes in the oil filter base that allow coolant or oil to seep out side of the filter base if an oil cooler seal is damaged.
