How do i bleed the cooling system?
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Joined: Mar 2000
Posts: 1,468
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From: Orland Park, IL, USA
Car: 88 IROC-Z
Engine: L98
Transmission: TH350
Axle/Gears: 3.45
How do i bleed the cooling system?
I think i may have an air pocket in my cooling system and I need to know how to bleed the system. thanks for the help.
By bleed od you mean flush? If so heres how. Theirs a small plug like things on the bottom of the radiator turn that and the radiator fluid will come out, usually after it comes out i will take about half a jug of 50/50 coolant and just pour it in the radiator with the plug open so any can get out then i will close the plug filll the radiator and then run car long enough for thermostat to open and then drai radiator again then pour about a half a jug of 50/50 coolant through it then close up the radiator and fill it up. Of course you don't have to fill it up and run it and drain it again just asimple drai it once will work but i do it twice to make sure its nice and flushed. This is how i've been tought to do it so correct me if i'm wrong here.
Since your radiator is the highest point in your coolant system, it should self bleed any remaining air in the system by normal driving. Just be sure to keep your overflow tank coolant at the correct level, and ensure that your radiator cap is new, or in good shape.
When I bleed my system I run the car for a few minutes with out the cap on and have the hose filling it up at the sametime. Do that until it reachs normal operating temp and fill the radiator up while its running. Also keep water in your overflow tank and it should be fine.
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