Recent Topics
Do you use / need a pillow to sleep at night ?
by Mr Nice
8 minutes 29 seconds ago
1911 - round in chamber or not?
by sasilverbullet
26 minutes 2 seconds ago
PEAK Conventional BOGO at Dollar General Thru Dec3
by anl0109
47 minutes 54 seconds ago
Dumpster diving special
by bbhero
Today at 06:56 PM
Where to get a cool cigar box
by ram_man
Today at 06:20 PM
CAPA Headlight Assembly
by Ramblejam
Today at 06:03 PM
Air filter replacement, how did I miss it?
by wtd
Today at 05:38 PM
Cheap used cars are back?
by fdcg27
Today at 05:11 PM
ROKU users: how do you like it?
by car51
Today at 04:49 PM
2015 F250 4WD question
by Donald
Today at 04:42 PM
[Cut Open] Fram Filtration XG7317 Ultra 19,428 mi
by DuckRyder
Today at 04:17 PM
Research Octane / Motor Octane ?
by Merkava_4
Today at 04:09 PM
Newest Members
Roswellien, Luis_Gabriel, Tech_man123, GLHRonin, Rochev
59770 Registered Users
Who's Online
99 registered (77GrandPrix, 69GTX, 3800Series, 01rangerxl, 4WD, 2cool, 10 invisible), 1879 Guests and 16 Spiders online.
Key: Admin, Global Mod, Mod
Forum Stats
59770 Members
66 Forums
257796 Topics
4240625 Posts

Max Online: 2862 @ 07/07/14 03:10 PM
Donate to BITOG
Page 2 of 2 < 1 2
Topic Options
#3050176 - 06/30/13 10:18 AM Re: GM Dex-Cool, 134K miles, 04 Chevy Tahoe [Re: dhellman12]
dhellman12 Offline


Registered: 08/29/11
Posts: 208
Loc: Keller, TX
Not sure how the concentration ended up so high. We bought this one at 119K miles and had not touched the coolant until after this report.
_________________________
04DMax 6.6L - Amsoil AME 15w40 197K
04Tahoe 5.3L - Amsoil ASL 5w30 207K
00WS6 5.7L - New to me 249K

Top
#3050404 - 06/30/13 02:14 PM Re: GM Dex-Cool, 134K miles, 04 Chevy Tahoe [Re: dhellman12]
901Memphis Offline


Registered: 08/14/10
Posts: 11238
Loc: Northern Kentucky
Well then its doubtful its the FF Then. Someone probably did a drain and fill and used concentrate. Possibly they just replaced a bad overflow tank and filled it with concentrate.
_________________________
2002 Buick Century 125k - Built 4T65e(Maxlife) - Syn Frankenbrew + XG 3387A
1998 Nissan Altima 335k - 5MT - M1 HM 5w30/Fram Ultra XG7317+MOS+ATP 205

Top
#3373519 - 05/16/14 06:06 PM Re: GM Dex-Cool, 134K miles, 04 Chevy Tahoe [Re: dhellman12]
Kira Offline


Registered: 08/19/10
Posts: 3043
Loc: Champlain/Hudson Valley
Dex-Cool in a neglected 2003 Chevrolet S-10 (50K) 8K ago. Great shape
Dex-Cool in a "randomly topped off" 2005 Saab 9-5 (58K) 25K ago. Great shape
Dex-Cool in an "in service" 2002 Saab 9-3 (113K) 1K ago. Great shape
Dex-Cool in a "randomly topped off" 2002 Saab 9-5 (125K) 40K ago. Great shape

Cleanse as necessary. Rinse with distilled water. Use distilled water to dilute to spec (50%).
Dex-Cool is A-OK in my book. Kira

Top
#3475906 - 09/06/14 05:01 PM Re: GM Dex-Cool, 134K miles, 04 Chevy Tahoe [Re: dhellman12]
DoubleWasp Offline


Registered: 05/21/12
Posts: 3487
Loc: Fort Lauderdale, FL
I'd never put any of that stuff in anything I own, but in the trucks I maintain, it has performed flawlessly. Always replace the Dex with Dex when something goes down. I installed coolant filters on all of them, just for the extra safety measure.

_________________________
2007 Lincoln Navigator M1 0w-40/FU
1968 Charger R/T / Supercharged 440 VR1/DBL7349
2007 Ram 3500 4x4 / Cummins 6.7 /DBL7349
2015 Porsche 911 C4S PDK

Top
#3477091 - 09/07/14 11:15 PM Re: GM Dex-Cool, 134K miles, 04 Chevy Tahoe [Re: dhellman12]
simplistic Offline


Registered: 07/31/13
Posts: 163
Loc: Tennessee
Originally Posted By: dhellman12
Not sure how the concentration ended up so high. We bought this one at 119K miles and had not touched the coolant until after this report.


During the service life of the coolant the water is boiled out. Every year I have to add 1-2qt's of water to my vehicles due to the water being 'cooked" out from the summer time heat. Example, I changed the coolant in my durmax. When I refiled and bleed the system out the ratio was 50/50. About 1 1/2 years later (30k miles) I was 2qts low on coolant. When I checked the ratio it was off a bit..over %60 dexcool. I added the water and that brought the ratio back down to what I had it set to.

Even some owners manuals say adding water up to 4 times a year is acceptable.
_________________________
03ccsb,2500hd 200k+ Durmax/Allison,PURE POWER FILTERS,Bilstin Shocks,Aux Springs,Swiss Cheese Air box Fram Tough Guard,BF Goodwrench K/O

Top
#3864027 - 09/24/15 11:43 AM Re: GM Dex-Cool, 134K miles, 04 Chevy Tahoe [Re: Bgallagher]
gallydif Offline


Registered: 09/08/15
Posts: 802
Loc: Little Havana, Miami
Originally Posted By: Bgallagher
Originally Posted By: SteveSRT8
Originally Posted By: PandaBear
Originally Posted By: SteveSRT8
Dex used to have issues but it flat out does not anymore. Even Ford is using it now.


Did they reformulate it? or did the cooling system design change?


As noted above^^^ it appears to be the same formula.

The real problem was gaskets. Dex isn't the big stinker the Internet has portrayed it as.


+1 Dex is EXCELLENT at keeping cooling systems clean but once a foreign coolant or air is introduced it can cause issues. The issues with the older vehicles were that the acids used in Dexcool would eat away at the gasket material (namely the Lower Intake and Head gaskets.) For the cars that experienced this, AC Delco and other have created new gaskets that are made of materials that wont corrode. Essentially fixing the issue. The only issue is that so many people are afraid of it and frankly I would chaulk it up to their ignorance. If you are truely worried I would switch to Peak Global.

+1. Dex cool started being put in in the '95-'96 vehicles don't remember exactly which one. When I bought my '96 roadmaster last year I did some research on dex cool since I had never had a car with the orange stuff before. And that's what I came across. Though the car was low mileage, I don't know how long it had been since the previous owner had done a coolant flush. Anyways, in the coolant reservoir I saw dark orange/brown pellets. Looked like some of it had turned into little balls of mud. My first thought was Oh No! I hope this hasn't ruined anything. And then I went ahead and did a coolant flush. I put in some new prestone dexcool and distilled water. Instead of doing it 50/50 though I made it about 65/35 (more dexcool then water).
On another note, I figure when you buy coolant that's already 50/50- it's not actually 50/50. They dilute it more than that. It's really 40/60 or 45/55


Edited by gallydif (09/24/15 11:46 AM)
_________________________
95 Caprice 58k LT1 dd- 5w30 Mag1 dino, NAPA Silver
96 Buick Roadmaster 60k LT1- 4 qt 10w30 PUP, 1 qt M EP, NAPA Silver
00 Town Car- RIP 8/23/16

Top
Page 2 of 2 < 1 2