You late model GTO guys still run that Dex Cool? In the "GTP World" that **** is always flushed out and replaced with conventional "green" antifreeze. Dex Cool causes all kinds of problems with clogging the cooling system and tearing up seals on the intake manifold. Just curious.
Clogging: Many think the sludge in the overfill is a breakdown of DEXCOOL when in fact its a rust inhibitor placed in there at factory to prevent corrosion, and to keep the internal workings of the water pump etc lubricated.
Many panic and say OMG the coolant has broken down. They flush this additive all out and replace with conventional anti-freeze. After a while things start happening to their radiator and other parts associated with cooling. Many come in here seeking answers to why did my radiator blow? Why did this happen? You ask them did you replace the DEXCOOL? The common denominator to most answers are: YES my radiator had sludge in it from the DEXCOOL and I replaced with conventional Anti-Freeze.
The owners manual clearly states use ONLY DEXCOOL. My 2004 Grand-AM says use only DEXCOOL.... My 2007 Doge RAM says use only: MOPARS version of DEXCOOL.
Little ironic its the GTOS using this new formatted coolant that has all these issues isn't it?
Many are ignorant of the proper additives for this car, from DEXCOOL to synthetic oils to F.M. in the rear end.
The only issues I see are from those who are not properly maintaining these cars. MOSTLY 2-4th owners of the car.
Tearing up seals? These motors are designed to be using DEXCOOL. Maybe the seals some are reporting being torn up is being done so by improper coolants or other factors.
Many know it alls on these cars who post their authorivite knowledge on them turn out to be shall I say less than astute on them.
USE DEXCOOL ONLY.... on this new GTO....
My '70 or older cars? NO!
Whenever in doubt ...... read the friggin manual.