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98 XJ NO HEAT

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Old 01-28-2010, 09:24 AM
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Default 98 XJ NO HEAT
Any ideas??? Flushed heater core
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Old 01-28-2010, 09:27 AM
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Assuming that your coolant is topped off... I've used CLR before to break up blockages in the heater core & it worked great.
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Old 01-28-2010, 09:31 AM
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Probably a vacuum problem, check all your vacuum lines.
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Old 01-28-2010, 10:34 AM
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yea the coolant is topped up, when i flushed the core it got warm at idle but then cold when driving.
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Old 01-28-2010, 10:46 AM
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Originally Posted by t1320t
Assuming that your coolant is topped off... I've used CLR before to break up blockages in the heater core & it worked great.
That is a great idea.. I am ATFing my crankcase now.. does this (CLR the cooling system) really work? How do you do it?
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