Pontiac 3057621 Radiator Assembly

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To remove the radiator, start by disconnecting the negative cable from the battery. Then, drain the cooling system by opening the petcock at the bottom right corner of the radiator and the drain bolts in the coolant pipes. Scribe alignment marks on the front compartment lid along the edges of the hinge brackets, remove the hinge bracket bolts, and remove the lid. Disconnect the overflow hose at the filler neck, remove the coolant recovery tank bolts, and remove the coolant recovery tank. Remove the fan frame assembly and loosen the radiator inlet and outlet hose clamps to disconnect the hoses. On automatic transaxle equipped models, disconnect and plug the transmission cooler lines. Remove the bolts attaching the radiator to the radiator support brackets. Snip off the heads of the plastic pop fasteners that anchor the air shroud to the top of the radiator. Grasp the radiator by the side tanks and carefully lift it from the engine compartment. To inspect and service the radiator, carefully examine it for leaks and damage. Brush accumulations of insects and leaves from the cooling fins. Inspect the radiator hoses and replace them if cracked or deteriorated. Flush the radiator and replace the radiator cap with a new one of the same rating. If installing a new radiator, transfer the fittings from the old unit to the new one. Lower the radiator into position, ensuring it is properly located on the lower mounting pads. Install the bolts attaching the radiator to the radiator support brackets and tighten them. Install the transaxle oil cooler lines, if equipped. Reattach the coolant hoses to the radiator fittings and tighten the hose clamps securely. Place the fan frame assembly in position, install the fan assembly mounting bolts, and tighten them securely. Reconnect the fan motor electrical connector. Place the coolant recovery tank in position and tighten the mounting bolts securely. Reconnect the overflow hose to the filler neck using a new clamp if necessary. Finally, fill the cooling system with coolant.