A: To replace the oil cooler, start by raising the front of the vehicle and supporting it securely on jack stands. Drain the cooling system and remove the engine oil filter. For installation, clean the mating surfaces and use a new gasket. Align the cutout on the cooler with the tab on the oil pan and tighten the bolt while holding the oil cooler to prevent it from turning. Finally, install a new oil filter, refill the cooling system, and check the oil level, adding as necessary.