Interesting Observation.
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Joined: Jun 2001
Posts: 3,175
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From: Bedford, Tx
Interesting Observation.
GM doesn't call for using "distilled water" in any cooling system.
in my 88 service manual for my T\A. or in the 2002 Service manual for my S-10.
from the 88 service manual..
doesnt' even suggest what mixture %..
from the 2002 service manual..
while the 02 Manual goes much more in depth with all the recomendations (for all fluids) it says nothing about requiring distilled water.
now im not saying that just because GM says u don't have to use it, that its not a good idea. cause it definatley IS a good idea to use it. but i just thought it was interesting..
in my 88 service manual for my T\A. or in the 2002 Service manual for my S-10.
from the 88 service manual..
"Mixture of water and good quality ethylene glycol based antifreeze ..."
from the 2002 service manual..
"50/50 mixture of CLEAN, DRINKABLE WATER and use only GM Goodwrench Dexcool....."
now im not saying that just because GM says u don't have to use it, that its not a good idea. cause it definatley IS a good idea to use it. but i just thought it was interesting..
Supreme Member
Joined: Aug 2001
Posts: 1,896
Likes: 1
From: Warrington, PA USA
Car: "02 z-28
Engine: LS-1
Transmission: 4L60E
Niether does Texaco who supplies Dexcool and in fact invented it. Texaco Dexcool says the same thing, "good quality tap water". I guess you have to interpret that, oh no, not another hot issue? 
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