No heat 91 4runner
#1
No heat 91 4runner
I have a 91 4runner v6 3.0. I replaced my thermostat checked to see if the heater core was clogged the hoses get hot and have pressure but I have no heat to very little at all. It's winter and I can't defrost my windows let alone stay warm. Any suggestions?
#2
Registered User
Did you "burp" the cooling system after you replaced the thermostat? Sometimes air bubbles in the coolant passages/hoses can keep coolant from flowing through the heater core causing the air not to heat up.
#3
Yes I bless the lines a few times til there were no bubbles. Could it be the water pump? The hoses have pressure though.
#4
Registered User
Was the heater on full blast (including the rear if you have it) when you bled/burped the system?
I'm just trying to get all the info I can before I try and guess what's wrong
I'm just trying to get all the info I can before I try and guess what's wrong
#6
Registered User
My heater hadn't worked well for years until I replaced my radiator which required a burping of the cooling system. Now it works even after a couple minutes of idling (at 35-40 degree outside temps BTW)!
I hope it works for ya!
I hope it works for ya!
#7
It did not work at all. I put a new radiator in last year cause my old one had blown. Had to replace that at night in the middle of winter not fun. Now I did notice I am a little low on antifreeze but when I did have it full it still did not work properly. But maybe need to try again with heat in and burp it when full. Any other ideas in case that does not work?thank you for your help btw
Trending Topics
#8
Registered User
You have to add coolant while burping... The air bubbles take up space that should be replaced with coolant while burping. I'm NOT saying this would make a difference for your heater problem, but it's something to remember in the future
Have you tried backflushing your cooling system?
This thread talks about it... https://www.yotatech.com/forums/f115...-issue-105570/
Have you tried backflushing your cooling system?
This thread talks about it... https://www.yotatech.com/forums/f115...-issue-105570/
Thread
Thread Starter
Forum
Replies
Last Post
the1998sr5
95.5-2004 Tacomas & 96-2002 4Runners
15
07-14-2020 08:35 PM
Poncho0206
95.5-2004 Tacomas & 96-2002 4Runners
3
07-10-2015 06:21 PM