I have a 94 gsr with a y7 sohc in it. i just replaced that thrrmostat on it and the heater still doesnt blow out very hot air. Any reason why?? any help on what to start with??

Thanks for any help

 

Consider that the stock Integra radiator has quite a bit more surface area than the stock Civic radiator. In my experience, most Y7's run relatively cool anyway.

 

You may have a blockage in/around the coolant lines that run to/through the heater core under the dash. That's where I would check.

 

yup check your heater core/evaporator core! and also check your switch, it might not be connected with the cable!

 

agreed. if you have the means try a coolant flush. might loosen up whatever's blocking the lines in the core.

 

Maybe try and swap in a civic rad.

Where does the temp gauge sit while your driving? Anywhere close to half?

 

**** im having the same problem on my 95. the temp needle stay on Cold all the time and the heater stay cool not hot.

 

even the integra radiator for the b18's i think are too big...my heater is nice and warm but when it starts dipping into the 20's and 10's it takes forever to warm up and its not as hot as some other vehicles...

 

y do u have a sohc in a teg

 

y does it matter? someone chime some idea on how to fix it allready.

 

yea man i had a problem similar but in a accord coupe, what i did was flush all my antifreeze, and even run sum air to get everything out, you might even want to take out the hoses that run to the heater core as well. Their is two one which antifreeze goes in and another one which return, and blow air into one which antifreeze goes in, and antifreeze may come out the returning hose, then put all hoses back on and refill with antifreeze. This actually worked for me, and now my car stays at normal temp and heater works well.

 

Easiest place to start is to switch your temperature setting on climate control all the way to hot, and then start the car without the radiator cap on to get air out of the lines.
Please do this with your car at a dead cold.

 

i will try the radiator thing in a min. the temp gauge is almost to half like normal but still cold air.

 

my civic had the same problem just yesterday, i had a hose that was blocked off almost completly and my heater wouldnt blow hot air to save my life, not to mention my temp gauge was almost to h, but i fixed it haha

 

what did you do to fix it?

 

I'm gonna take an educated stab & say either your thermostat is stuck open or is rated too cold, since your radiator is now bigger than your engine
You might not be able to fix it since your fan is regulated by a Y7 temp switch, but you could try a 90-degree thermostat & see if it helps, and possibly try a resistor on your temp switch. Just make sure you keep your dial on COLD and don't use the fan until it warms up.

Otherwise the problem lies in heater core blockage... but we'll cross that bridge only if it's necessary.

 

i ended up just putting a new hose from the heater switch and that fixed it
your not leaking any antifreeze or anything are you?