Heater

[mikewb]

Hey guys i need some ideas. I got a 82 swb chevy half ton. havent been able to get heat. Thought core was plugged soo i bought a brand new one and put it in yesterday still nothin. I thought might be the doors not opening and closing correct under the dash soo i took part off the front and moved then with my hands to see if there was hear coming out of there at all and theres not. The hoses are warm to touch but not hot. Cant figure out what else could be. Is it better to have the engine hose run off the intake or water pump?

[dumbucket1]

are you sure you even have a thermostat on your engine?

[mikewb]

Yeah. I checked to see if there was one and its in there. but i dont know what size

[mikewb]

would a different thermostat let it get hotter?

[Lt.Del]

the thermostadt might be stuck open.  Therefore not closing to allow engine to warm propertly, therefore, not having much heat/defrost.

Put another tstadt in there, they are cheap.  Ensure one hose going to heater core is hot, the return should not be as hot. 

[mikewb]

Both hoses are just barely hot. I can hold them without any problem

[VileZambonie]

Put a 195° T-stat in it

[mikewb]

is that bigger then normal? whats the biggest one?

[Lt.Del]

I wouldn't describe it as "bigger" but normal tstadt is 180.   a 195 will bump the temp up prior to opening up. A new tstadt will keep the temp where it supposed to be.  When you take the old one out, note the spring on it and if it is compressed, that keeps it open and the antifreeze is just free flowing no matter the temp.

[VileZambonie]

195° is factory.

[mikewb]

That the hottest one you can get?

[VileZambonie]

No but you don't need or want hotter than that. Just replace yours. I replace mine every year.

[mikewb]

Ok boys, I got a new thermostat and heater core. And still no heat. What else might it be? It doesnt even blow warm air.

[VileZambonie]

Are the hoses to the heater core hot?

[Lt.Del]

I am assuming you did this after replacing the tstadt, but, ensure your antifreeze level in radiator is good.  That is the blood of the heater system.