Toyota 16491-03150
Cooler, Oil(For ATM), Driver Side

Draining engine coolant and stripping off the oil filter constitute the initial tasks to service an oil cooler. Disconnect the 2 water bypass hoses from the oil cooler before you uninstall the union bolt and plate washer and the nut leading to removal of the oil cooler. Check the condition of the O-ring from the oil cooler before replacing it with a new one if required. The service starts by preparing the oil cooler mounting contact surface followed by O-ring application to the cooler before using the nut for temporary fixation. Start by applying a thin layer of engine oil to all areas under the union bolt head and threads. Place the plate washer followed by the union bolt on the mounting before reaching target torque of 78.5 Nm (800 kgf.cm, 58 ft. lbs.). Fasten the nut to 9.0 Nm (92 kgf.cm, 80 inch lbs.) before reattaching the 2 water bypass hoses to the oil cooler. After installing the oil filter between steps the engineer must perform a leak check while also examining the engine oil level.

Service begins with draining engine coolant before proceeding to detach the oil filter and oil cooler through removal of water bypass hose connections and clearance of union bolt with plate washer and nut and oil cooler while extracting its O-ring from the cooler. The oil cooler needs visual analysis for damage and clogging before a replacement can be made. First clean the mounting surface for the oil cooler then place a new O-ring onto the cooler before installing it with the nut. Use engine oil for a thin layer on the union bolt threads and under its head before placing the plate washer then bolt followed by torquing to 78.5 Nm (800 kgf-cm, 58 ft. lbs.) then nut torquing to 9.0 Nm (92 kgf-cm, 80 inch lbs.). The water bypass hoses must be attached to the oil cooler before installing the oil filter and filling with engine coolant which activates the system to check for leaks and measure correct engine oil level.