When you are servicing a cold engine, you should add coolant to one inch below the filler neck which allows for expansion as the engine warms. Coolant can rise as much as one inch as the engine warms up. Start your engine with the radiator cap removed and coolant one inch below the neck. Then, observe as the engine warms. Summit Racing™ Performance Fit Aluminum Radiator and Fan Combos SUM-384031-KIT1 Radiator and Fan Shroud Combo, Performance Fit, 4-Row, Aluminum, Polished, Chevy, Corvette, 5.7L, Each Part Number: SUM-384031-KIT1 3 Nov 09 08:09. I have been getting conflicting information from aluminum radiator suppliers. One supplier has told us that the use of non-aluminum compatible antifreeze will eat away the radiator in as little as a few days. Another supplier has told us the worse effect of non-compatible antifreeze is that it will turn to a sludge like substance. This type of coolant contains fast-acting silicate and phosphate corrosion inhibitors that protect cast iron engines, bi-metal (cast iron/aluminum) engines, and copper/brass and aluminum radiators. "IAT" (Inorganic Acid Technology) is the traditional "green" formula antifreeze. This is the stuff General Motors used until 1996, Chrysler Open, inspect, and re-seal: Cars that sit for years are prone to corrosion buildup in every part of the cooling system, as water and coolant react with steel and aluminum. Really you have no idea what's inside until you open it up. Drain the coolant and remove and inspect the water pump. If it's corroded, the inside of the radiator might For example, my '91 Syclone's aluminum radiator lasted over 10 years, even though (I'm ashamed to admit) I didn't always drain the non-extended-life coolant every spring like you're supposed to. .

do aluminum radiators require special coolant