When the seams of your Corvette radiator show signs of leaking antifreeze or your car runs too hot, it is time to replace the radiator. New high-efficiency radiators made from aluminum are superior in performance to the old copper and brass versions. The aluminum tube configuration allows more of the surface to air, resulting in an increase in heat dissipation of over 30 percent. You can replace a C3 Corvette radiator on an ordinary Saturday with a few common garage tools.
Tools Used: Pencil, Container for antifreeze, Socket set, Open-end wrench set, Flat-head screwdriver, Pliers, Flare-nut wrench, Antifreeze, Thread sealant
Remove Radiator
Park the car on a level surface. Place a container under the radiator and open the petcock at the bottom of the radiator to allow all the antifreeze to drain out.
Open the hood and make a mark where the bolts are positioned on the hood hinge brackets with a pencil. This will give you reference for proper alignment when reinstalling the hood. Remove the bolts and have a helper assist you in removing the hood. Place the hood in a safe place where it will not get damaged.
Remove the four bolts holding the fan to the water pump with a socket wrench. Pull the fan off the shaft and remove from the car. Remove the three bolts on each of the fan shroud brackets using a socket or open-end wrench.
Loosen the hose clamps on the upper and lower radiator hoses with a flat-head screwdriver. Pull the hoses off the radiator connection and remove them. Lift the fan shroud out and away from the car.
Locate the radiator mount support brackets on each side of the radiator support. Remove the bolts with a socket wrench.
Remove the nylon retainer locks if your car is equipped with air conditioning or a transmission cooler. Pull and carefully twist the locks to the side.
Remove the upper radiator mounting bolts with a socket wrench. Pull up on the brackets and remove them. Remove the overflow hose by pushing back the clamp a few inches with a pair of pliers and pulling it loose from the housing.
Remove the upper and lower transmission cooler lines, if so equipped. Use a flare-nut wrench to remove the lines. Place a bolt or plug in the lower line to prevent transmission fluid leakage. Remove the radiator from the car. It helps to have a buddy assist you with this task.
Install a new radiator and reassemble. Use Permatex or equivalent thread sealant on the transmission lines when reinstalling. Replace antifreeze with new product. Remount the hood and check for proper alignment. Adjust the position of the hinge mounting bolts as needed.
Tips & Warnings
Antifreeze is sweet tasting and highly toxic to pets. Take special precautions and do not to let any drip onto your garage floor or leave in an open container.
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