Pontiac 52457457 Radiator

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The radiator is positioned on two rubber pads at the bottom and is secured by a metal panel or the fan shroud at the top, with additional rubber pads used at the top. The negative battery cable is disconnected before the radiator is drained. The upper and lower hoses at the radiator are disconnected, as well as the automatic transmission lines at the radiator, if equipped. The ends of the lines are plugged to prevent fluid loss and contamination. The overflow hose at the radiator cap is also disconnected. The upper support or fan shroud is removed from the top of the radiator, allowing the radiator to be lifted straight up and out of the engine compartment. Care is taken not to scratch the body paint or drip coolant. Any coolant on the paint is washed away, as antifreeze can harm the finish. Once removed, the radiator can be inspected for leaks or damage. If repairs are needed, a professional radiator shop or dealer is recommended as special welding techniques are required. Bugs and dirt can be cleaned from the radiator using compressed air and a soft brush, taking care not to bend the cooling fins. The rubber mounting pads which the radiator sits on are inspected and replaced as necessary. The radiator is then lifted into position, ensuring it is seated in the mounting pads. The upper panel, shroud and hoses are installed in the reverse order of removal. The negative battery cable is connected and the radiator is filled. The engine is started and checked for leaks. The engine is allowed to reach normal operating temperature and coolant is added until the level reaches the bottom of the filler neck. The cap is installed with arrows aligned with the overflow tube.

To remove the radiator, start by disconnecting the negative battery cable. Drain the cooling system and remove the air cleaner assembly. If the vehicle has an automatic transaxle, disconnect the cooler lines from the radiator and cap the ends. Remove the engine cooling fan assembly. Loosen the hose clamps and detach the radiator hoses from the fittings. Disconnect the reservoir hose from the radiator neck. Plug the lines and fittings to prevent spillage. Remove the bolts from the radiator mounting panel and carefully lift out the radiator. Inspect it for leaks and damage. Clean the radiator with compressed air and a soft brush. Check the radiator mounts for deterioration. To install the radiator, start by installing the cooler line retaining clips onto the quick-connect fitting. Snap the cooler lines into place on the quick-connect fittings and reinstall the plastic collars. Fill the cooling system with the proper mixture of antifreeze and water, bleed the system of air, and check for leaks. If working on an automatic transaxle equipped vehicle, check and add fluid as needed.