Hi guys I just started expieriencing a problem with my heater the problem i'm having is that when I'm driving my heater works fine but then when I come to a stop light and sit there for a little bit instead of heat it starts blowing cold air but when i start driving again it starts blowing hot air again like it normally should if anyone has expierienced this or knows what it is please let me know thanks
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I had the same thing happen to me. I had air in my radiator. Go get the system bled.

 

air in the system. when you rev up the heat will get hotter. simply take the rad cap off (NOT WHEN THE ENGINE HAS BEEN RUNNING), stick a funnel in the hole, top it off and let the car run til normal temp. rev it up a few times, you will see any bubbles come thru. once it looks pretty normal put the cap back on and try it out.

 

wow that sounds like areally easy fix i'll try it out tommorow and let you guys know how it went Thanks alot for the info

 

uh I thought you are suppose to use the bleeder in the rear of the engine bay to remove air bubbles. Which is why its there. I have never heard of taking off the cap to the reservoir or the radiator to take out bubbles.

 

doing it by the rad cap is a lot faster and easier to do.

 

^ ah I see. But I am pretty sure its not the best way.

 

^+1. There's a reason it's there.

 

there is a reason, it is to get the trapped air out. using the rad cap gets the majority of it out quickly and easily. if you use the bleeder on the back of the motor it will take forever and its a pain to get to (at least for me, i have big A*s hands.) If you want to get rid of all the air out use the rad cap first to get most of it and then use the bleeder.

 

Get a longer tool

So I see what you mean. Rad Cap to get most of it out, but if you still have the problem you need to use the bleeder in the back.

 

well guys ive tried the radiator cap technique several times and it didnt work for me i guess ill have to try the bleeder where is it located on the engine bay?

 

wait until your G is completely cool.
open radiator cap
open air relief plug
pour 50% coolant 50% distilled water mixture very slowly to fill the radiator using a funnel
fluid level will start to rise and will go higher than your radiator neck
at this point it will stabilize and you can keep pouring
once it starts leaking out of the air relief plug you can stop pouring
soak up excess coolant in funnel, remove funnel, reinstall air relief plug with new o-ring and radiator cap

It will take a few heating/cooling cycles to fully resolve your cool air at idle scenario.

Generally speaking, after the cooling system has initially been bled of excess air, you shouldn't have problems with air pockets that would affect the cabin air temp. If you started having this problem and coolant service hasn't been done in a while, it is likely that you ran low on coolant and air was sucked into the system. Before proceeding check your coolant levels and pressure test the system to confirm you don't have any leaks.

 

maybe im asking a dumb question but where is the air relief valve/

 

Watch my diy coolant service video and you shall see

 

follow the upper radiator hose, its towards the end