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1984 944 Running Hot

Engine

Vehicle Information: Model(924/944): 944; Year: 1984; Engine (type, size, modifications): 2.5; Total Mileage: 11,000;

My car started running hot after about 3 miles. Both fans will turn on with the A/C on, but not with it off, even when the gauge goes above the middle. Upper and lower hoses get hot as does the coolant tank. The gauge goes to the middle when I keep the air on, but the car still runs rough, like its on 3 cylinders. I changed the coolant about 3 weeks ago to Zerex G05, drove it twice, but not on the freeway and it ran fine, until today. I followed the coolant change instructions precisely. The car has very low original miles and it's an automatic.

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