2003 Cadillac CTS radiator

Radiator Replacement

Tools Required
J 38185 Hose Clamp Pliers
J 44827 Transmission Cooler Quick Disconnect

Removal Procedure
Drain the coolant.

Remove the radiator support brackets.
Remove the cooling fans.
Remove the 2 upper condenser mounting bolts.
Raise the vehicle. Refer to Vehicle Lifting. See: Maintenance Vehicle Lifting

Notice: The transmission oil cooler lines use a quick connect fitting at the radiator. The quick connect fitting must be removed using a special tool. Removing the transmission oil cooler lines without the tool will result in damage to the radiator and the transmission oil cooler, and may damage the transmission due to mixing of the transmission oil and coolant.

Using the J 44827 (2) disconnect the lower transaxle oil cooler line from the radiator.

Using the J 38185 disconnect the lower radiator hose (1) from the radiator.

Remove the lower condenser mounting bolts.
Remove the radiator side seal push pins.
Separate the side seals from the radiator.
Lower the vehicle.
Remove the radiator.

Installation Procedure
Install the radiator into the insulator in the frame.

Notice: Refer to Fastener Notice in Service Precautions.
See: Service Precautions Vehicle Damage Warnings Fastener Notice

Install the upper condenser mounting bolts. Tighten the bolts to 6.5 Nm (58 inch lbs.) .
Raise the vehicle.

Install the lower condenser mounting bolts. Tighten the bolts to 6.5 Nm (58 inch lbs.) .
Push the lower transaxle oil cooler lines into the radiator until you hear it engage.
Gently tug out on the transmission oil cooler lines to verify that the lines are engaged into position.
Connect the lower radar hose to the radiator.
Using the J 38185 slide the clamp into the original position on the hose.

Connect the auxiliary transmission oil cooler line to the radiator (3).
Install the side seal pushpin into the radiator.
Ensure that all seal are in place around the radiator.
Lower the vehicle.
Install the cooling fans.
Install the radiator supports.
Fill the system with coolant.

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