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Question:

What is my radiator on my 1991 Oldsmobile Calais Tech4 2.5L made out of?

Im in the process of sealing the quot;Leakquot; Im Flushin the Radiator, letting it cool down now(It REALLY Holds heat, it seems?) I dont know if the quot;Leakquot; was A LEAK or Normal (quot;Smokequot; in Expansion tank,) but im wonderign what the Radiator is made out of.The Coolant is ALMOST running Clear, you are right it was a VERY dirty Radiator.I have an Automatic Transmission, the water is about to be 100% in there, is the Radiator STEEL or ALUMINUM?And what hapens if you leave either 100% WATER in the Radiator, OR only put in like 33% Coolant as opposed to 50/50? And what is my Cooling system's TOTAL Capacity? Thanks!(Im being VERY careful to NOT put COLD water on HOT Radiator.)

Answer:

the radiator itself is aluminum but the sides are probably plasticuse some jb weld on ityou can flush it with plain water and use 50/50 anti-freeze.

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