I concur with Will.

I have examined the plastic gaskets in the pictures and from my car and the gaskets are only degraded where the coolant wicked in the channels.
I have a first design L36 GM gasket that was in a motor using Green phosphate coolant (not Dex) for at least 5 years and the gasket looks like new.

If only one car in 100,000 cars has the cooling system eaten away by acidic Drx then there is a problem with the produc

From what I have read you can not use Dex in a Diesel motor or it will void the warranty.

Time to try some G-05 at least it does not have 2EH like Dex.

I have yet to see the 'dex effect' on a green coolant 3800. Heat is not the culprit. Neither of my L67'* have ever had this effect, and my 95 shows clear signs of having been severely overheated in it'* life. Yet the OEM gaskets I removed at 130k were good enough to be re-used.

Just out of curiosity, what'* the lawsuit against GM about regarding Dex-cool? Is it about this very same topic (i.e. Dex eats gaskets)?

Chris

Well, here'* what it did to my 96 SSE. Judge for yourself. More evidence to support WillWren...