Question about 1994 Chevrolet Astro

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Poor heat output motor runs cold

I had a slight headgasket leak.antifreeze out of top of motor.barsleak stopped the leak.i flushed the heatercore and changed the t-stat withfactory temerature stat.the stat opens at about 170 degrees and closes quickly at any stop.even after driving30 miles or more highway.heat output is poor and motor runs cold.the control vavle to the heatercore seems to be opening.. please help.thanx freezing in ohio

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  • doaripp Jan 04, 2009

    hoses are on correctly. the lengths make mixup nearly impossible. i think the barsleak was the larger bottle with maybe the aluminum filings

  • doaripp Jan 04, 2009

    thankyou for the advice

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Check the hoses going to inlet and outlet to heater core. You may have accidentaly hooked them up backwards since you said you flushed the heater core out. Also did the barsleak have the aluminum filings in it?

Posted on Jan 04, 2009

  • Michael Sharar Jan 04, 2009

    the filings will cause it to plug also if you have the heater valve on it check and make sure the vacumme line to it is ok

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