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Running Hot, Tried Almost Everything To Keep My Cool 200 1981

posted by  someone claiming to be 81242B21FCA on  Fri Jan 2 19:53 CST 2004 [RELATED]

Had similar problem but only at idle and low speeds. I changed everything including a three row radiator and water pump twice (GMB, Volvo). Then did some experiments. Tied fan blades (7 blade w/ thermostatic clutch) to pump shaft with nylon cable ties to make turn at full engine speed. No diff. Then inspected air flow around fan at idle with a strip of paper, dangerous! Turns out there is virtually no flow through the radiator, air just circulated around the tips of the fan. Finally fixed with aux fan in front of a/c condenser. Wired to come on with compressor.






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