there are no visible leaks.
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2000 Pontiac Firebird Question: I have no heat . return line is cold from h.core.
Answer #1pushrod November 23, 2013, 12:02Master
Have the heater core itself flushed out! This needs to be done by a shop that knows how!! Air pressure + water.
Replypil0t266, November 23, 2013, 12:25Rookie
thanks will give it a go
Replypushrod, November 23, 2013, 12:31Master
We have good luck with this at the shop! Check out youtube, enter your question on the search bar, you may be able to do something, if that dont work take it to the shop.