Hello,
I have a 2002 Chevy Impala with the 3.8 liter engine. I just turned
62,000 miles on it mostly of which is highway mileage.I have an extended warranty until 82,000 miles and wanted to change my Dexcool Antifreeze. Is this a good time to have it replaced? Should I stick with Dexcool or go with some of the other brands out there? (There is so much information against Dexcool as well as some positives as long as it is changed more frequently than the 100,000 mile interval). I was thinking of replacing it with Dexcool again since the vehicle is still under warranty.
Can I adequately flush the system myself with the Prestone Flush Kits or do I need to have a mechanic use a machine to ensure complete flushing of the cooling system to include the engine block?
I have used the Prestone Flush and fill kits in the past but did not know how effective it is with the 3.8 liter engine.
When I change the antifreeze, I plan to replace the Thermostat as well as the radiator cap as I understand air can get into the dexcool thru the radiator cap. (Does this sound reasonable?). Do I need to put in more sealer tablets into the new antifreeze? How many and where are they inserted? Put them in whole or cruch them up?
My father has a 2001 Lesabre with the 3.8 and wants to change his antifreeze as well. These are some of his concerns as well as he has had a leaking intake manifold.
Thanks In Advance