Question about 1999 Mazda 626

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2000 Mazda 626 LX V6, temp gauge goes dramatically up, then down

While driving the temp gauge goes beyond hot, but no steam or noise, so I turn on the heater full blast, it goes RIGHT BACK down! But, even tho the heater is still on, the gauge goes up then down...it scares me as I dont' want to blow the engine or something. I only have like 75000 miles on the car, so it's almost like new...ish...been well taken care of, but this is intermittent and I cannot seem to figure it out. I wouldn't think it was the thermostat, because that either works or it doesn't, so if it went out, it would stay out...but, what could it be?

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  • donella_fitz Feb 12, 2009

    actually, thank you very much, but I found out the problem today, the expansion tank is cracked, and it again needs to be replaced, this is the third one in 2 years! GO FIGURE

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The thermostat needs replacing

Posted on Feb 12, 2009

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