BMW 17113415693 Radiator

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To remove and install the radiator, first raise the car and support it safely, then remove the splash shield from under the engine. Drain the radiator and remove the electric cooling fan and cowl. Release the hose retaining clips and disconnect the upper and lower coolant hose fittings. On the right side of the radiator, release the hose retaining clips and disconnect the lower coolant hose fitting. Underneath the radiator, disconnect the harness connector from the coolant level sensor in the coolant expansion tank. For vehicles with automatic transmission, disconnect the automatic transmission fluid cooler lines from the ATF cooler at the quick disconnect unions by pushing the hose toward the oil cooler and pressing the black locking ring into the hose fitting while pulling the hose off the cooler, ensuring a drain pan is ready to catch any spilled ATF. Alternatively, the ATF cooler can be removed from the radiator by pulling up on the quick release clips. On the left side of the radiator, remove the screw and loosen the fastener for the radiator mount, and on the right side, loosen the fastener for the radiator mount. Tilt the radiator inwards and lift it out of the engine compartment. Installation is the reverse of removal, ensuring the radiator seats firmly in the lower mounts, the electric cooling fan cowl clips are secure at the bottom, and the cooling system is refilled and bled while checking for leaks.

The expansion tank accommodates coolant expansion at elevated temperatures and allows for easy monitoring of the coolant level.