![]() Ģ0.Rinse away any excess coolant from the engine and the engine compartment. Inspect the concentration of the engine coolant using the J 26568. Fill the coolant recovery bottle to the indicator line.ġ9. Turn the engine off and allow it to cool down to room temperature.ġ8. Thermostat, this will allow the trapped air to be purged from the engine.ġ6.Complete a series of three, 4-second-duration idles with 4-second-durationġ7. ![]() Fill the coolant recovery bottle to the indicator line, then add 400 millilitersġ5.Start the engine and run it above 2500 RPM until it is hot enough to open the Install the pressure cap, fully threaded on.ġ4. Install the pressure cap loosely (threaded on about one turn).ġ1.Start the engine and raise the engine speed to 2500 RPM and hold it there forġ2.Remove the pressure cap and fill the coolant system until the level is visibleġ3. Remove the pressure cap and fill the coolant system until the level is visibleġ0. Start the engine and raise the engine speed to 2500 RPM and hold it there forĩ. ![]() Install the pressure cap loosely (threaded on about one turn).Ĩ. Remove the pressure cap and fill the coolant system until the level is visibleħ. Start the engine and raise the engine speed to 2500 RPM and hold it there forĦ. Install the pressure cap loosely (threaded on about one turn).ĥ. Slowly fill the cooling system with a 50/50 coolant mixture until the coolant Important: Use a 50/50 mixture of DEX-COOL antifreeze and clean,ģ. Refer to Draining Fluids and Oil Filter Removal for theģ.5L engine or to Draining Fluids and Oil Filter Removal for the 3.9L engine. If a complete engine block drain was required, install the coolant drain plugs the official procedure is very **very** convoluted and is the only thing that worked for me last time.ĮDIT 2018.05.20 I found the proceedure and am reposting here for anyone who needs it - this is straight from GM in 2010.Ģ. I have seen all the regular old "typical advice" which works on most cars. Long story short, I need to purge it again, but no amount of google-foo of mine is finding those official GM shop manual instructions this time. And googled around till I found the official air purge instructions from GM shop manual (since the 3.9L does not have a bleeder screw it is convoluted). I have a 2006 G6 GTP Convertible with the 3.9L engine.Īges ago I had a water leak (very typical of these engines - water pump gasket or crossover tube), fixed that.
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