I'm looking to buy a low mileage ( 100k km / 62k miles ) 03 Buick LeSabre for my wife. The 3800 V6 runs Dexcool, and I've heard horror stories about Dexcool, but I've also read other opinions that it's not a problem at all as long as
- air doesn't get into the cooling system.
- The engine doesn't pass coolant through the intake manifold
So... The 3800 V6 in the LeSabre passes coolant through the intake manifold and seems to be known for having issues with the intake manifold gasket failing around 60k miles, and there was apparently a class action lawsuit claiming that it's due to the Dexcool.
If the vehicle is running Dexcool, should I flush it and install a different coolant, and if so what?
As a bonus, is there anything specific I should look out for with this vehicle beyond the typical inspection routine?