98 XJ NO HEAT

Jan 28, 2010 | 09:24 AM

chevyguz

Thread Starter

Newbie

Any ideas??? Flushed heater core

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Jan 28, 2010 | 09:27 AM

t1320t

Junior Member

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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Jan 28, 2010 | 09:31 AM

206junglist

Member

Probably a vacuum problem, check all your vacuum lines.

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Jan 28, 2010 | 10:34 AM

chevyguz

Thread Starter

Newbie

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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Jan 28, 2010 | 10:46 AM

trapper

Seasoned Member

Quote:

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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