Dexcool in LT1?
Le Mans Master
Joined: Apr 2005
Posts: 6,413
Likes: 9
From: The Old Dominion
Originally Posted by REDC4CORVETTE
I have had the Orange stuff in my 94 for 3 years and no problems .
I don't mix it with anything 100%.
I don't mix it with anything 100%.
You might consider running it 50/50 instead.
Melting Slicks
Joined: Apr 2003
Posts: 2,150
Likes: 6
From: NS
Originally Posted by Aurora40
What's the rational behind not diluting it 50/50? It's your car, and if it works for you... But it won't transfer heat as well when not diluted, it probably won't have as good freeze protection, and supposedly Dex-Cool can be rather caustic when not diluted properly.
You might consider running it 50/50 instead.
You might consider running it 50/50 instead.
Pure distilled water will conduct heat better than any mix of antifreeze. That's why race cars use only water under high pressure (sometimes with an additive like water-wetter). 50/50 antifreeze is better in street cars because it's a good comprimise between boil over/freeze protection and provides adequate heat transfer. 100% antifreeze does not transfer heat very well at all, your car will run hotter if you run 100%.
Burning Brakes
Joined: Sep 2005
Posts: 987
Likes: 1
From: Braidwood Il.
Green stuff
Originally Posted by Atok
If this is true then they must have switched sometime during the year, because my '95 came with the green stuff.
If you are going to change it, be sure to do a good flush including removing the knock sensors to drain the block. Fill with clean water, run the engine to warm it up, drain and repeat a few times.
[Edit]
Just checked my Service Manual. Page 6B-6...."Use a 50/50 mixture of high-quality ethylene glycol antifreeze, GM specification 1825-M..."
That's the green stuff. So it looks to me like '96 is the first year for Dexcool in Vettes.
If you are going to change it, be sure to do a good flush including removing the knock sensors to drain the block. Fill with clean water, run the engine to warm it up, drain and repeat a few times.
[Edit]
Just checked my Service Manual. Page 6B-6...."Use a 50/50 mixture of high-quality ethylene glycol antifreeze, GM specification 1825-M..."
That's the green stuff. So it looks to me like '96 is the first year for Dexcool in Vettes.
Intermediate
Joined: Mar 2004
Posts: 26
Likes: 0
Dexcool is good stuff, but like any other products; one needs to knows it limitation in its use. I've been using Dexcool on My Vette for several years, with no problems. See attached link on Dexcool usage:
http://www.imcool.com/articles/antif...l-macs2001.htm
Biggest thing is to flush you system out, replace your radiator cap, and keep the mixture at a 50-50. If you use a less the 50-50, add some additional inhibitors like WaterWetter(r) from RedLine.
If you are converting from te green stuff for the first time, don't wait 5 years to change it. Change the initial changeout fluid after 2 years, then you can do it in 5 years intervals afterward. I don't care how well you flush the system out during the initial changeover, you'll never get all the green stuff out. There will always be some residuals.
Dexcool is getting a bad rep because people continue to pour the green stuff into a radiator system filled with Dexcool.
Or you can just forget it all and just stay with the green stuff. At least it's not being phased out like the Ozone-Depleting based Freon.
http://www.imcool.com/articles/antif...l-macs2001.htm
Biggest thing is to flush you system out, replace your radiator cap, and keep the mixture at a 50-50. If you use a less the 50-50, add some additional inhibitors like WaterWetter(r) from RedLine.
If you are converting from te green stuff for the first time, don't wait 5 years to change it. Change the initial changeout fluid after 2 years, then you can do it in 5 years intervals afterward. I don't care how well you flush the system out during the initial changeover, you'll never get all the green stuff out. There will always be some residuals.
Dexcool is getting a bad rep because people continue to pour the green stuff into a radiator system filled with Dexcool.
Or you can just forget it all and just stay with the green stuff. At least it's not being phased out like the Ozone-Depleting based Freon.
Le Mans Master
Joined: Oct 2001
Posts: 6,798
Likes: 25
From: Pine Bluff Arkansas
St. Jude Donor '08-'09-'10-'11-'12-'13-'14-'15-'16-'17-'18-‘19-'20-'21
Originally Posted by Corvette Kid NC
As a professional wrench for over 30 years, I wouldn't use it in anything. But that's as close as I'll come to getting involved in this potential argument.
