im trying to figure out my overheating problem so right now im burping the system and noticed that my heater hoses by the firewall are very hot after running for about 7 min while my upper radiator hose is just warm. i also noticed that both of the hoses were hot before i turned the heater on as well. i though the bottom hose that goes into the firewall wasnt suppose to heat up (with coolant) until the valve opens to put coolant into the heater. could a bad heater valve cause overheating? maybe i should concentrate my attention towards the hoses and heating components up by the firewall rather than the front by the radiator. i replaced practically everything up front already anyways. thanks in advance!
heater hose question
- Thread starter Back2Basics
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correct me if im wrong but i dont believe its a bad thing for those hoses to get hot, and i dont think it would cause overheating unless you had a leak back there.
Coolant doesn't flow into the radiator until the thermostat opens but coolant flows through the heater core as soon as the pump is spinning and the valve is open. Maybe the valve is stuck open as well.
If the valve is bad or you bypass the entire heating system...either will not cause you to have overheating problems unless you have a leak somewhere that is allowing air in the system.
I have never had the need to blurp my system....I believe and I'm know I'm going to get flamed for this...but if everything is working correctly you do not need to do this.
Are you loosing coolant or hairing the waterfall in your dash is it boiling over? whats going on?
I have never had the need to blurp my system....I believe and I'm know I'm going to get flamed for this...but if everything is working correctly you do not need to do this.
Are you loosing coolant or hairing the waterfall in your dash is it boiling over? whats going on?
rumptis said:
Thats how I understand it. If you have a tight system, no air is getting in, why would you ever need to burp?
»fo
Air pockets like to hide. It's for good measure, do it anyway. Do you have a way to monitor the air content in your coolant system? Are you just assuming everything's good?
You'd be surprised.
You'd be surprised.
well i ended up letting it sit and idle for about 30 min with the front end much higher than the back to get all the air out that i could. i just got back from taking it out on the streets and a short run on the highway. it didnt overheat according to the gauge (which works), but its still so damn hot. you cant touch it for more than a second or it'll burn. the biggest thing that bothers me is that i cant see any coolant flowing in the radiator top even after the thermostat should open. it just stays at the same level. if i rev it, then the level will go down, then when i let off the level will come back up. maybe a bad thermostat?
That's normal behavior, and the level going down means it's flowing. Do you still have an electric fan?
nope, i converted back to the stock setup. so i dont have to worry about the radiator not flowing? as long as the level goes down when i rev it? does it sound like my thermostat is opening?
Yes, that's exactly what my car does, and even at normal operating temp...touching the engine will likely burn you. Is the stock fan loud while you are driving? Can you hear it "fanning"? LOL So the guage says it's fine, then?
my car didnt have the heater vsv hooked up... so coolant was running through the heater core as soon as it started no big deal...
so how do i by pass the heater core to just eliminate any problems on that side? i cant really hear the fan when driving. how tight should i have that belt? im not really sure. i just have it so its just snug so the belt doesnt have any chance of coming off.
Well then what are you worried about? Keep driving it and see what happens, I personally think that the overheating problems were caused by your electric fan.
probably and hopefully. i just got done driving it about 25 miles on the highway and no problems. but when i went back out to my car later there was a puddle of coolant on the ground that was coming from the overflow bottle. could i have too much coolant in and that is why its pouring into the overflow tank? the tank was at the level its suppose to be at before i made the longer highway runs. what would cause this?
my car would do the exact same thing, and I tried and tried to figure out the problem, It ended up being my radiator cap! i didn't suspect the cap, because it was new from Toyota, but I guess even toyota can't get it right all the time!...I would suggest you get a new one, or at least pressure test the cap, and see if it holds 13psi...and while your at it, pressure test the cooling system...easy!
well thats good to know it was only the cap because i was thinking the same thing. i noticed that mine really went on easily without much effort; its also the kind with the pressure reliever and when i relieved it, coolant actually came out from under the cap. that cant be right so maybe i'll pick one up from toyota tomorrow. remember how much it cost or a part number?? thanks for the help johnathan