bleeding the air

[supraman508]

could anybody tell me where do you bleed the air from the system.because about 3 cups of my radiator fluid runs into my overflo when i'm driving,which makes the temp gauge fluxuate and over heat.do you bleed the system near where the thermostat is located.:1zhelp:

 

[cuel]

There isn't a bleeder on the 7m. Unfortunately, I'm gonna tell you to do a block test...

 

[gtsfirefighter]

Doesn't sound good. Check your thermostat first and if that's ok check for the dreaded::bhg::

 

[BlackMKIII]

The proper way to burp the coolant:

/thread :biglaugh:

 

[gtsfirefighter]

He said he's boiling over and overheating, nothing about the waterfall.

 

[BlackMKIII]

Well, that's how I always fill it. Keeps the air out of the whole system.

 

[cuel]

lol. I fill mine sitting flat on the ground, and never have a problem. I use a no spill funnel, but even without it, I can completely drain and refill my cooling system, and not have any trapped air.

 

[suprarx7nut]

lol. I fill mine sitting flat on the ground, and never have a problem. I use a no spill funnel, but even without it, I can completely drain and refill my cooling system, and not have any trapped air.

same here. Granted, I've only done it once on the supra so far, but I didn't have a problem in the least.

 

[BlackDynamite]

The proper way to burp the coolant:

/thread :biglaugh:

FTW!

Looks like the supra is being held up by a yellow oil pan.

 

[BlackMKIII]

^^^ LOL. Working at a shop with lifts has serious advantages.

 

[Big Wang Bandit]

A proper cooling system usually doesn't need to be burped.

 

[CyFi6]

all cooling systems need to be burped. Dunno what you mean by they dont. If you mean air shouldnt be getting in there then i guess ya, but air tends to get trapped in there after doing a cooling system flush and people usually just leave it.

 

[jetjock]

He means just what he said and he's right. In a life time of working on cars I've come across only a handful that require bleeding and on those the cooling system configuration makes the need obvious. This car isn't one of them. In 20 years of owning mine I've never had to bleed it. Not once. Nor have I had to do it on any other Supra I've serviced.

I don't doubt some people have air but it's not from an inherent flaw in the cooling system design. More like leaks, indiscriminate/unintelligently done cooling mods, improperly installed thermostat, bhg, ect. Regardless, stating all cooling systems need burping is just wrong. If you don't want air in there to begin with fill the system properly. That means slowly. Even if air gets in it'll be automatically purged as long as everything is working right. Or vacuum fill it, which what I do these days.

 

[CyFi6]

how do you vacuum fill a system? do you need a special tool?

 

[Yellow 13]

how do you vacuum fill a system? do you need a special tool?

Yes.

I've never had to pressure flush mine. I just fill it up let it run until it gets warm then put the heater on full blast and add more as needed.

 

[jetjock]

You can buy a vacuum filler around $80 or adapt a cooling system pressure tester to do it if you already own one, as everybody who works on cars should. Or you can be cheap and use a shop vac.