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03-07-2011, 02:42 PM
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#1
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Senior Member
Join Date: Jan 2010
Posts: 2,136
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Is using Dex-Cool...cool?
With a planned extended trip this summer and the fact that the MH chassis is now 7 years old(28K miles), I was thinking about changing the radiator coolant and changing the upper and lower hoses. The fluid is orange in color and I think it is Dex-Cool. I pulled up Dex-Cool and found this...
Consumer complaints about DexCool in GM Engines
Holly cow! Should I stop using this stuff or has Dex-Cool fixed what seems to have been a BIG problem in the past?? My W-22 has the aluminum radiator so I guess I have to use something that is compatable...we've had no problems as of yet. What do you think? Bob
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Jan and Bob
'05 Monaco Windsor 40 DST - ISL / '08 Wrangler
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03-07-2011, 02:48 PM
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#2
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Senior Member
Join Date: Feb 2002
Location: bel air, md
Posts: 797
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after 5 years in my old chevy chassis i changed over after flushing the system to prestone that is good for any system.
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09 Winnie 32 h adventurer towing '18 Malibu
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03-07-2011, 04:12 PM
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#3
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Senior Member
Fleetwood Owners Club Solo Rvers Club
Join Date: Oct 2010
Location: Quartz Hill, California
Posts: 445
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We found out about this coolant/gasket problem about 4 years ago. We have repaired many GM vehicles with gasket leak problems. We ALWAYS switch the vehicle over to Prestone All Makes / All Models coolant.
(will blend ok with any small leftover dex in motor)
We use a flushing machine to do it, so it will get the most old coolant out.
__________________
'94 Bounder 32h. Chevy V-8 44k miles and like new. Tow 4 down 2007 Saturn Vue w/Honda V6
Retired Memorial Day wknd, 2015, but who's counting
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03-07-2011, 07:08 PM
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#4
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Senior Member
Join Date: Jan 2010
Posts: 2,136
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I did notice that in the hoard of complaints in the link were all GM cars and PUs. Has anyone experienced the gasket problem using Dex-Cool in their MHs? Thanks, Bob
__________________
Jan and Bob
'05 Monaco Windsor 40 DST - ISL / '08 Wrangler
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03-07-2011, 07:13 PM
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#5
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Member
Fleetwood Owners Club
Join Date: Mar 2011
Posts: 32
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Quote:
Originally Posted by scenic route
With a planned extended trip this summer and the fact that the MH chassis is now 7 years old(28K miles), I was thinking about changing the radiator coolant and changing the upper and lower hoses. The fluid is orange in color and I think it is Dex-Cool. I pulled up Dex-Cool and found this...
Consumer complaints about DexCool in GM Engines
Holly cow! Should I stop using this stuff or has Dex-Cool fixed what seems to have been a BIG problem in the past?? My W-22 has the aluminum radiator so I guess I have to use something that is compatable...we've had no problems as of yet. What do you think? Bob 
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Hello,
I bought my wife a 2006 Chevy Impala in 2006. Last year, we had severe overheat problems. Took it to the dealer, and the "Dealer" told me that the intake gasket and head gasket had been damaged by the "dex cool" anitfreeze.  We had an extended warranty on the car, so the fix was not that expensive for us, but had I not had that, it would have cost a fortune. The tech at the dealership told me that dex cool will eat up the inside of an engine.....I'd change that crap immediately!
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03-07-2011, 07:58 PM
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#6
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iRV2 Marketing
Winnebago Owners Club Workhorse Chassis Owner Coastal Campers Carolina Campers
Join Date: Jan 2000
Location: Conway, SC
Posts: 23,595
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Guys ..... My motorhome is about 9 years old and rapidly approaching 90,000 miles all on Dexcool. Properly maintain your system, and your system will take care of you.
__________________
03 Adventurer 38G, Workhorse W22
F&R Track Bars, Safety+ , Ultrapower, Taylor Extremes, SGII
TST 507, Blue Ox, SMI, Koni FSD, CrossFire
RV/MH Hall of Fame - Lifetime Member
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03-08-2011, 07:33 PM
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#7
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Senior Member
Workhorse Chassis Owner
Join Date: Jan 2002
Location: Pacific Northwest or SoCal
Posts: 3,015
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Quote:
Originally Posted by DriVer
Guys ..... My motorhome is about 9 years old and rapidly approaching 90,000 miles all on Dexcool. Properly maintain your system, and your system will take care of you. 
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I agree Mike, all 6 GM vehicles we have owned/own have used Dexcool with no problems.
fred
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Fred and Bonnie
2005 Dolphin LX 6375
Abby, Ruffles & Scarlett, "The Cats"
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03-08-2011, 09:07 PM
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#8
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Senior Member
Damon Owners Club Workhorse Chassis Owner Forest River Owners Club Ford Super Duty Owner
Join Date: May 2005
Location: Parker, CO
Posts: 3,195
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You guys are scaring me too. But I have a '00 Chevy and '05 MH with Dex cool and no problems yet. C DOT uses an orange antifreeze in their trucks, I guess it's like dex cool.
Is it a problem to mix green and orange antifreeze? Seems like I heard it was not good but I'm not sure.
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Max49
2018 Forest River Georgetown F-53
'08 Wrangler & '08 Suzuki Vitara Toads
Rocky Mountain High, Colorado
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03-09-2011, 12:34 AM
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#9
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Senior Member
Monaco Owners Club Workhorse Chassis Owner
Join Date: Jun 2008
Location: Glendora Ca.
Posts: 1,471
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 I change my dexcool with every engine, so it dont go bad.
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2004 Monaco Monarch
Blueox, SMI, 1990 Wrangler YJ
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03-09-2011, 01:02 AM
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#10
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Registered User
Vintage RV Owners Club Gulf Streamers Club
Join Date: Oct 2010
Location: Indiana
Posts: 4,954
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Quote:
Originally Posted by mfire1339
 I change my dexcool with every engine, so it dont go bad. 
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So you dont use the dexcool from your old engine in the new one??
Couldnt resist
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03-09-2011, 01:08 AM
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#11
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Registered User
Vintage RV Owners Club Gulf Streamers Club
Join Date: Oct 2010
Location: Indiana
Posts: 4,954
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I know people have different ideas on brands, but I use Peak.. Peak Global Lifetime specifically. Its a non-2eh, phosphate and silicate free coolant that is actually the same that comes in Audi's and Mercedes's cars that usually costs $13 a Liter..
2-eh is the ingrediant in Dex-Cool (and others) that has been linked to early gasket failure... Phosphates mix with hard water (if you have to top off at a gas station) and creates clogs.. Silicates is what eats your water pump bearings.
PEAK GLOBAL® LIFETIME® Antifreeze & Coolant
It is a recommended product replacement for Dex-Cool and meets GM6277M and GM1825M specs.
http://www.peakantifreeze.com/pdf/sp...l_lifetime.pdf
Final Charge is the commercial diesel product..
http://www.peakantifreeze.com/antifr...l_charge.shtml
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03-09-2011, 01:38 PM
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#12
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Senior Member
Fleetwood Owners Club Solo Rvers Club
Join Date: Oct 2010
Location: Quartz Hill, California
Posts: 445
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Don't mix the 'green' with the dex, as it will cause gelling. That's why we use a machine to flush out the dex, then use the 'all-makes, all-models' stuff. There will always be a small amount of coolant in the engine that you just can't get out, so this stuff mixing with any coolant, thus, no gelling.
__________________
'94 Bounder 32h. Chevy V-8 44k miles and like new. Tow 4 down 2007 Saturn Vue w/Honda V6
Retired Memorial Day wknd, 2015, but who's counting
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03-09-2011, 07:19 PM
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#13
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Senior Member
Workhorse Chassis Owner
Join Date: Jun 2006
Location: Northwestern Montana
Posts: 3,375
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I believe Prestone says you can mix thier product with Dex-Cool.
Dieselclacker
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03-09-2011, 07:44 PM
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#14
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iRV2 Marketing
Winnebago Owners Club Workhorse Chassis Owner Coastal Campers Carolina Campers
Join Date: Jan 2000
Location: Conway, SC
Posts: 23,595
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Quote:
Originally Posted by dieselclacker
I believe Prestone says you can mix thier product with Dex-Cool.
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Dieselclacker, Both of the products that I have that are labeled "Dexcool" full strength and 50/50 are made by Prestone.
__________________
03 Adventurer 38G, Workhorse W22
F&R Track Bars, Safety+ , Ultrapower, Taylor Extremes, SGII
TST 507, Blue Ox, SMI, Koni FSD, CrossFire
RV/MH Hall of Fame - Lifetime Member
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