Coolant Flush
11-11-2004, 04:24 AM
#1
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Coolant Flush
Now with the winter on the way I wanted to drain the coolant and replace it with new fluid. The antifreeze looks kind of old. I'd like to do this service myself but I have never done it before. How do you drain the radiator and is there anything more than just filling up the system with antifreeze. I know I am suppose to use only the OEM red stuff. Any tips will be greatly appreciated. Thanks
11-11-2004, 05:41 AM
#2
Go to audipages and read the Timing belt procedure- it has the steps to......
drain and fill the antifreeze as part of the procedure.
Start at the heading "Drain Radiator" (you don't need to do anything before that), stop at the "Remove Radiator Hoses" section and then skip down to the bottom of the procedure where you find
"Using a large flat-blade screwdriver, close the radiator drain valve (blue) at the bottom of the radiator behind the front lower grille. Reinstall the two coolant low-point drain plugs into the bottom of the engine if they were removed earlier. (Leave the high-point bleed plugs off.) Add 5 liters of G001200 Red Pentosin (if the coolant was completely drained, otherwise add a 50/50 mixture) coolant to the coolant reservoir and inspect all ports for signs of leakage.
Add demineralized water until coolant exits the high point bleed ports. Install both high point bleed plugs and tighten snug.
Reinstall the oval cover in the cutout in the lower driver's side bumper (where the coolant drain valve is accessed)."
Run the engine until fully warmed up (make a run the the liquor store and get some beer), let the engine cool off and re-check the coolant level in the reservoir- top off as needed.<ul><li><a href="http://www.audipages.com/Tech_Articles/enginemechanical/tbreplace0.html">http://www.audipages.com/Tech_Articles/enginemechanical/tbreplace0.html</a</li></ul>
Start at the heading "Drain Radiator" (you don't need to do anything before that), stop at the "Remove Radiator Hoses" section and then skip down to the bottom of the procedure where you find
"Using a large flat-blade screwdriver, close the radiator drain valve (blue) at the bottom of the radiator behind the front lower grille. Reinstall the two coolant low-point drain plugs into the bottom of the engine if they were removed earlier. (Leave the high-point bleed plugs off.) Add 5 liters of G001200 Red Pentosin (if the coolant was completely drained, otherwise add a 50/50 mixture) coolant to the coolant reservoir and inspect all ports for signs of leakage.
Add demineralized water until coolant exits the high point bleed ports. Install both high point bleed plugs and tighten snug.
Reinstall the oval cover in the cutout in the lower driver's side bumper (where the coolant drain valve is accessed)."
Run the engine until fully warmed up (make a run the the liquor store and get some beer), let the engine cool off and re-check the coolant level in the reservoir- top off as needed.<ul><li><a href="http://www.audipages.com/Tech_Articles/enginemechanical/tbreplace0.html">http://www.audipages.com/Tech_Articles/enginemechanical/tbreplace0.html</a</li></ul>
11-11-2004, 10:00 AM
#7
Although the fluid is not supposed to deteriorate, the rest of the cooling system......
can and will, especially the hoses. When the fluid isn't a nice clear pinkish-red color any more, it is time to flush and replace it.
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