Dex-cool yes-or-no?
Senior Member
Posts like a Turbo
Joined: May 2003
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From: B'ham.AL
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 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.
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Joined: Aug 2002
Posts: 11
Likes: 13
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.
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