Topic: heater

[cali4runner]

my heater wont blow hot air... i have already put a thermostat and it didn't help at all.... its an 88 4runner w/ a 22re what else can i do? thanks guys

[81_yota]

plugged heater core

[Peterbuilt84]

Probably going to have to replace the heater core

[Sparkplug]

when the truck is warm, and heater on, are the hoses running into the firewall solid, or are they real soft, like nothing is in them. Need more details.

[81_yota]

all i know is it seems those heater core plug up way to easy i cant tell u how many i have eatin sludge on

[85_4RNR]

Probably going to have to replace the heater core

Doubt it. Either heater core plugged or your linkage controlling the valve that regulates flow of coolant in to heater core broke

[85_4RNR]

Buy a Toyota thermostat. Ive went through 4 parts store ones. They last about 10000 miles or are junk from out of the box.

[81_yota]

pluged heater core only way you ever need to replace heater core is if it is leaking plugage can be blowin out disconnect hose and use water hose try to push water through if none use air hose but stand off to side or mess on u will occur

[81_yota]

thermostat will only cuz over heating or over cooling is not your problem

[cali4runner [OP]]

@bog-toy ok one house is soft and the other is not i can feel the fluid on one of them. when the truck is warm it blows for a few seconds warm then goes cold.. idk if that helps at all. thanks

[cali4runner [OP]]

@81_yota if its the heater core how much do they run for? and are they hard to get to? thanks.

[81_yota]

pluged heater core if one has pressure and other dont then simply unplug

[81_yota]

unplug it first dont buy new if u dont have to most likly they are cheap but on some u have to take apart most of the dash to replace so if not leaking dont replace

[Sparkplug]

if 1 hose is solid other isnt, then is obvious you have a block. Its either a bunch of crap, or could just be air, have you reid burping the system since doing the tstat?

[79toy20r]

Yea I would try burping the system first, cheapest and easiest

[jmac]

back flush that thing with waterhose.  I did it after reading several post here suggesting it.  Mine flushed right out and worked great.

If you do this it's easier to disconnect hoses from ends not on the heater core; those soft copper lines coming out of the firewall are begging to get boogerred up

[cali4runner [OP]]

so don't disconnet them off the fire wall? just on the ends then... then just get the water hose and let run out?? thanks