mixing coolants?
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TECH Enthusiast
Joined: Jul 2003
Posts: 580
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From: The Republic of Texas
A quick question...... I just did the throttle body bypass mod and lost a little coolent during the process. Not a lot, but I went and added a small amount of regular coolent to the dexcool that was already in the radiator, was this a bad decision or is this okay to mix a small amount of prestone coolent to this gm mixture without hurting anything?
I didn't even think to question this before I did it. Any response would be appreciated
I didn't even think to question this before I did it. Any response would be appreciated
Re: A quick question...... Shouldn't hurt anything, but next time just use water. Here in TX we don't freeze often anyways, you can actually dilute the Dexcool more with water and make the efficiency of the cooling system increase.
Tony
Tony
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Joined: May 2004
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Very bad decision. When you mix the two, it produces a sort of acid and will rot out your radiator. Happened to my '98. Get your system THOROUGHLY flushed and fill it back with Dexcool. Do it again in a few thousand miles. Once you mix them, it is almost next to impossible to get it all out. It was a $600 mistake for us.
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From: Live Oak, FL - in the woods where the creatures lurk.
There is a coolant now that is compatible with either the old style or Dexcool. I recently drained and flushed my Z28 and our Ranger and put it in. This coolant was from Advance/Discount auto parts.
FWIW.
Edit: it is an extended life coolant like Dexcool.
FWIW.
Edit: it is an extended life coolant like Dexcool.
ok flush that sucker good real good and put dex cull back in there never mix them and do not use the green one use the dex cool, orange color one.
Green=iron engines
DEx cool orange= alum engines
Green=iron engines
DEx cool orange= alum engines
