Car:91 Integra
motor: B18b1
Problem: No hot air.
Parts replaced: Thermostat,control valve (open/shut)
After trying a couple things, my heater is still blowing cold air.The last "guess" I have is that I used some "powder sealer" in my radiator last week, because of a hair line crack I had. Is there a chance that the "powder sealer" clogged something? I flushed everything,but still no HOT air. Anyone have this problem befor?

 

Chances are your sealer clogged your heater core.

Did you try bleeding it yet?
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How would I go about bleeding the heatercore?

 

I would think that it was the sealer. Otherwise you can always pull the dash and inspect everything :P

 

From a cold start warm up the car and turn on the heat. Feel both heater core lines. If ones hot and one isn't you found your problem.

 

I had the same problem but when you don't have coolant in your system and it's pouring out the waterpump and from the headgasket that could be a reason too of why I didn't have any heat! lol

 

1=Hot
1=cold
So its my heatercore.

 

fill your radiator up with degreaser, remove your thermostat so it could flow without the car having to heat up and run the car in idle for an hour. i cleaned my radiator this way and it looks new inside again. oh and set the heat to high and turn on the ac to high too so the degreaser flows into the heater core. make sure you flush it out with water afterwards.

 

What kind of degreeser,and has anyone else ever tried this?

 

o man i had to do a heater core ounce, its a pain in the ***. good luck on it