Coolant Flush (HELP) - Page 2 - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


1987-1991 Parley with regards to your 1987 to 1991 Bonneville, Olds 88 or Buick Le Sabre Please use General Chat for non-mechanical issues, and Performance and Brainstorming for improvements.

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Old 03-31-2006, 11:08 PM   #11
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block drain plugs are located both front and rear of the block. They are square plugs, located just above the oilpan, and the middle of the block.
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Old 03-31-2006, 11:21 PM   #12
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well actually i realized that dex cool is what i have been running for 8 months now, but i am running it on a 70/30 mix...so i need to 50/50 it for summer....then i am gonna leave it that way...

also...that whole block drain thing sounds kinda sorta difficultish and waste-o-timeish....why don't i just drain the radiator, full with water, go run it for a little while, come back, drain, re-fill with water, and THEN add in the 50/50 of dex cool OR WHATEVER i decide to put in...?
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Old 03-31-2006, 11:26 PM   #13
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They do make some coolants that you can "mix" with whatever you have already.
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Old 03-31-2006, 11:27 PM   #14
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yeah, i think you can mix dex cool with green crud
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