Coolant Flush

[save_me_jebus]

I work in a chrysler dealer ship and was actually just talking with one of the mechanics about coolant flushes. I was told that after 100,000 you want to get the Dex-cool out and put normal antifreeze in because the Dex-cool actually starts to eat the engine. So when ever they do a coolant flush on a car with dexcool they just put the green antifreeze back in.

[bearcatdon]

I hope they tell the owner that the antifreeze has been changed. I pity the guy that tops of his rad with Dex-cool after reading it in the owners manual. Won’t he be surprised to find sludge because a mechanic took it upon himself to not follow the mfg recommendation? Lots of people won’t do their own flush but won’t think twice about filling up a low rad. Unfortunately, most of these individuals wouldn’t know the difference between the two types.

[save_me_jebus]

Im assuming that they would tell the person... If not well it sucks to be the dealership that has to buy them a new engine Why would it do damage to engines past 100 000 k? Does anyone know?

[bearcatdon]

Personally, I can’t see what difference the mileage would have on the type of antifreeze used for the flush. It’s my understanding that all problems occurred with the original OEM coolant. Original OEM coolant + an improper sealing rad cap = Dex-cool jello. Coolant purchased at the store has been reformulated to eliminate that problem. Initial Dex-cool issues left a sour taste in many mouths and some people prefer to stick with “Ole Faithful Green”. This issue is a fireball and if you do a search you’ll find lots of discussions on the topic. GM and Texaco had released a big study that was done.