Does this release any air trapped in the cooling system or Vice versa?
04-07-2013, 11:07 PM
#1
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Does this release any air trapped in the cooling system or Vice versa? Like the title says. Just replaced the the radiator. T-stat and radiator cap. Bled the system of air and drove car around for 20 mins or so. Everything was fine. Is it ok to open the bleeder screw to release any air left on the system? Or does this allow air back into the system? Thanks for any input
04-08-2013, 09:57 AM
#2
If the rest of the cooling system is stock, it will bleed itself. The air will migrate to the top of the radiator where it will be pushed out through the overflow as the engine heats up. After 2-3 heating cycles all air should be gone. If you have any air after that under the cap, there is another issue.
04-08-2013, 09:33 PM
#3
Like the title says. Just replaced the the radiator. T-stat and radiator cap. Bled the system of air and drove car around for 20 mins or so. Everything was fine. Is it ok to open the bleeder screw to release any air left on the system? Or does this allow air back into the system? Thanks for any input
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04-09-2013, 06:36 PM
#7
TECH Senior Member
If cooling system is pressurized then opening the bleed screw will let trapped air escape... when you see only coolant coming out then there is no more trapped air.
If not pressurized then it might let air in.
If not pressurized then it might let air in.
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04-09-2013, 11:09 PM
#8
LT1's are the black sheep around here.Here is Shoebox's method for bleeding. FWIW, I don't even use the bleeder screws.
http://shbox.com/1/4th_gen_tech2.html#radflush
04-10-2013, 03:34 PM
#9
TECH Senior Member
Shbox says this:
For the LT1 this is important.
. . .
Using a 50/50 mix of coolant to water, fill the system through the radiator neck (bleeder valves open). You should hear a hiss of air from the bleeder valves as you pour in the coolant.
. . .
Close bleeder screws when bubbles disappear and only coolant is visible.
. . .
Using a 50/50 mix of coolant to water, fill the system through the radiator neck (bleeder valves open). You should hear a hiss of air from the bleeder valves as you pour in the coolant.
. . .
Close bleeder screws when bubbles disappear and only coolant is visible.
. . .
