93STS Posted December 17, 2006 Report Share Posted December 17, 2006 I just changed the waterpump on my 93 STS. Any reason I should not use Dexcool this time instead of the green antifreeze? The parts guy at the dealer said to use Dexcool but I'm not sure the parts guy knows what he is talking about sometimes. Link to comment Share on other sites More sharing options...
JimD Posted December 17, 2006 Report Share Posted December 17, 2006 You can use Dexcool. Just be sure to observe the 2 year / 24,000 mile change schedule. Jim Drive your car. Use your cell phone. CHOOSE ONE ! Link to comment Share on other sites More sharing options...
Cadillac Jim Posted December 17, 2006 Report Share Posted December 17, 2006 JimD is right. Unless you totally flush and clean out your system to eliminate the silicon-based sealant in the green stuff, the new anti-freeze will need replacing on the two-year schedule, just like the green. Some say it will give better protection anyway. There is a third type, "universal," that uses the OAT technology of the red stuff but is compatable with both; it is green. I would look at that too, and if I used it, do whatever it's manufacturer recommends as a change interval. -- Click Here for CaddyInfo page on "How To" Read Your OBD Codes-- Click Here for my personal page to download my OBD code list as an Excel file, plus other Cadillac data -- See my CaddyInfo car blogs: 2011 CTS-V, 1997 ETC Yes, I was Jims_97_ETC before I changed cars. Link to comment Share on other sites More sharing options...
growe3 Posted December 17, 2006 Report Share Posted December 17, 2006 According to our guru, once green always green. The silicone type coolant can not be completely removed from the engine. Flushing the coolant system is not recommended, just drain as thoroughly as you can, and refill with the green type coolant; change it at two year intervals. Prestone makes a "universal" type coolant (green) that works fine. -George Drive'em like you own 'em. - ....................04 DTS............................ Link to comment Share on other sites More sharing options...
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