aluminum rad. flush
- Thread starter jlat
- Start date
I copied this from a previous post I made on the same subject.
Here's how I've always flushed mine:
Drain existing coolant and leave petcock open. Take off the upper hose at the radiator and angle it off to the side so it can flow (don't drench anything electronic). Stick an open garden hose (no nozzle) in the Rad Cap hole and turn it on full. The petcock won't be able to keep up with the hose and the rad will slowly fill. Once this happens, turn the car on and let it run. Eventually it will get up to temp and the thermo will open and start flushing the contents of the block. Let the cycle run a few times until nothing but clear water comes out the upper rad hose. Cut the engine off, turn the hose off and remove, leave the top hose off, let the rad drain. Close the petcock and fill with premixed antifreeze high enough to see but not get close to the upper hose opening. Run the engine again and let the thermo cycle until you just start seeing a steady stream of the coolant. Turn the engine off, reattach the upper hose and fill all the way. With the engine up to temp it wont take long to purge the rest.
Hutch
Here's how I've always flushed mine:
Drain existing coolant and leave petcock open. Take off the upper hose at the radiator and angle it off to the side so it can flow (don't drench anything electronic). Stick an open garden hose (no nozzle) in the Rad Cap hole and turn it on full. The petcock won't be able to keep up with the hose and the rad will slowly fill. Once this happens, turn the car on and let it run. Eventually it will get up to temp and the thermo will open and start flushing the contents of the block. Let the cycle run a few times until nothing but clear water comes out the upper rad hose. Cut the engine off, turn the hose off and remove, leave the top hose off, let the rad drain. Close the petcock and fill with premixed antifreeze high enough to see but not get close to the upper hose opening. Run the engine again and let the thermo cycle until you just start seeing a steady stream of the coolant. Turn the engine off, reattach the upper hose and fill all the way. With the engine up to temp it wont take long to purge the rest.
Hutch
Evap-O-Rust Thermocure worked great for me on my Alradco Aluminum Radiator.
THERMOCURE Cooling System Rust Remover & Flush | CRC
THERMOCURE cooling system rust remover and flush removes rust scale and deposits from radiators, water pumps, engine blocks, and more.
www.evapo-rust.com
Last edited:
Here’s what came outEvap-O-Rust Thermocure worked great for me on my Alradco Aluminum Radiator.
THERMOCURE Cooling System Rust Remover & Flush | CRC
THERMOCURE cooling system rust remover and flush removes rust scale and deposits from radiators, water pumps, engine blocks, and more.
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Looks like flushing things out was a good idea. It's not Campbell's chunky soup and that's good news too!
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