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#4808117 - 07/08/18 07:02 AM Dexcool compatibilty
LeakySeals Offline


Registered: 02/18/11
Posts: 6618
Loc: Hudson, NH
I'm having continual problems with leaking and failing plastic heater core quick connects on a 06 Escalade. I want to get rid of the plastic and use metal tees and hoses. Are there any metals I should not use with dexcool?
_________________________
06 Escalade 6.0L AWD 160k. M1 5w30 Fram TG
03 Maxima 3.5L 152k ST HM 10w30

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#4808150 - 07/08/18 07:37 AM Re: Dexcool compatibilty [Re: LeakySeals]
skyactiv Offline


Registered: 03/02/13
Posts: 4480
Loc: The Midwest
Have you replaced your radiator cap? Maybe you have a defective one that lets too much PSI build in the system.
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#4808153 - 07/08/18 07:40 AM Re: Dexcool compatibilty [Re: LeakySeals]
mrsilv04 Offline


Registered: 12/08/06
Posts: 8297
Loc: Illinois
Are the heater hoses too long or too short, or routed wrong, and are putting too much stress on the quick connects?
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2004 Silverado - on its 3rd Jasper engine in less than one year.

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#4808161 - 07/08/18 07:54 AM Re: Dexcool compatibilty [Re: LeakySeals]
dogememe Offline


Registered: 04/15/17
Posts: 692
Loc: SF BAY AREA, CA
If you use the Dorman junk from the parts store they will fail again.
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#4808169 - 07/08/18 08:11 AM Re: Dexcool compatibilty [Re: skyactiv]
LeakySeals Offline


Registered: 02/18/11
Posts: 6618
Loc: Hudson, NH
Originally Posted By: skyactiv
Have you replaced your radiator cap? Maybe you have a defective one that lets too much PSI build in the system.

Don't have one. The gauges say everything is normal. A little under 215.
_________________________
06 Escalade 6.0L AWD 160k. M1 5w30 Fram TG
03 Maxima 3.5L 152k ST HM 10w30

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#4808170 - 07/08/18 08:13 AM Re: Dexcool compatibilty [Re: mrsilv04]
LeakySeals Offline


Registered: 02/18/11
Posts: 6618
Loc: Hudson, NH
Originally Posted By: mrsilv04
Are the heater hoses too long or too short, or routed wrong, and are putting too much stress on the quick connects?

Well it's the factory set up which routes along the engine cover. There isn't much play. And it's difficult to put the engine covers on and off without taking everything off. I do wonder if the engine flexing is slowly wearing these things out. Another reason to change the configuration to metal and a bit longer hoses rerouted away from the engine
_________________________
06 Escalade 6.0L AWD 160k. M1 5w30 Fram TG
03 Maxima 3.5L 152k ST HM 10w30

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#4808175 - 07/08/18 08:19 AM Re: Dexcool compatibilty [Re: dogememe]
LeakySeals Offline


Registered: 02/18/11
Posts: 6618
Loc: Hudson, NH
Originally Posted By: dogememe
If you use the Dorman junk from the parts store they will fail again.

I think you might be right. Each one of these failures has been a catastrophic emergency on the side of the highway sending me into the parts store for the Dormans. I've taken videos of them just wiggling loosely on the ends of the heater core pipes. When these things fail they are a catastrophe if it's on the highway. It's just not worth playing games with plastic heating core quick connects anymore. They don't quick disconnect. They are a pain. I just want to put on metal and hoses and be done with it. Those things can ruin your vacation and destroy your engine in a matter of minutes
_________________________
06 Escalade 6.0L AWD 160k. M1 5w30 Fram TG
03 Maxima 3.5L 152k ST HM 10w30

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#4808180 - 07/08/18 08:23 AM Re: Dexcool compatibilty [Re: LeakySeals]
JHZR2 Offline



Registered: 12/14/02
Posts: 41884
Loc: New Jersey
Originally Posted By: LeakySeals
Originally Posted By: dogememe
If you use the Dorman junk from the parts store they will fail again.

I think you might be right. Each one of these failures has been a catastrophic emergency on the side of the highway sending me into the parts store for the Dormans. I've taken videos of them just wiggling loosely on the ends of the heater core pipes. When these things fail they are a catastrophe if it's on the highway. It's just not worth playing games with plastic heating core quick connects anymore. They don't quick disconnect. They are a pain. I just want to put on metal and hoses and be done with it. Those things can ruin your vacation and destroy your engine in a matter of minutes


So what metal and hose do you intend to use instead? Dorman or equivalent junk?

Get the OE parts, hurt once, and move on.

Even my nearly 40 year old Mercedes cars have plastic radiators and they are original.

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#4808181 - 07/08/18 08:23 AM Re: Dexcool compatibilty [Re: LeakySeals]
LeakySeals Offline


Registered: 02/18/11
Posts: 6618
Loc: Hudson, NH
This is a six-month-old Dorman. Everything was fine suddenly a catastrophic loss of coolant on the highway. It just broke in two.
_________________________
06 Escalade 6.0L AWD 160k. M1 5w30 Fram TG
03 Maxima 3.5L 152k ST HM 10w30

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#4808183 - 07/08/18 08:31 AM Re: Dexcool compatibilty [Re: JHZR2]
LeakySeals Offline


Registered: 02/18/11
Posts: 6618
Loc: Hudson, NH
Originally Posted By: JHZR2
Originally Posted By: LeakySeals
Originally Posted By: dogememe
If you use the Dorman junk from the parts store they will fail again.

I think you might be right. Each one of these failures has been a catastrophic emergency on the side of the highway sending me into the parts store for the Dormans. I've taken videos of them just wiggling loosely on the ends of the heater core pipes. When these things fail they are a catastrophe if it's on the highway. It's just not worth playing games with plastic heating core quick connects anymore. They don't quick disconnect. They are a pain. I just want to put on metal and hoses and be done with it. Those things can ruin your vacation and destroy your engine in a matter of minutes


So what metal and hose do you intend to use instead? Dorman or equivalent junk?

Get the OE parts, hurt once, and move on.

Even my nearly 40 year old Mercedes cars have plastic radiators and they are original.

GM plastic heater hose quick connects are a known weak spot. It was a bad idea and everyone with a GM truck knows it and will be dealing with the problem sooner or later. In my case it was so bad I'm not even using the truck right now until I come up with another solution that isn't plastic.
_________________________
06 Escalade 6.0L AWD 160k. M1 5w30 Fram TG
03 Maxima 3.5L 152k ST HM 10w30

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#4808191 - 07/08/18 08:40 AM Re: Dexcool compatibilty [Re: LeakySeals]
sprite1741 Offline


Registered: 05/02/05
Posts: 450
Loc: Idaho
Plastic, heat and age are the problem. Unfortunately they (manufacturers) all use it. 12 years and my radiators fail like clockwork. It's always the plastic. The last time the Dodge went the plastic tank split open and gushed hot coolant everywhere.
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#4808192 - 07/08/18 08:48 AM Re: Dexcool compatibilty [Re: LeakySeals]
LeakySeals Offline


Registered: 02/18/11
Posts: 6618
Loc: Hudson, NH
I know why they did it. Because the heating core hoses get in the way when you're working on the engine or putting the engine covers back on. In theory it's easy to snap them off and get them out of the way. Well anyone that has dealt with them knows that it's not easy. Doesn't matter I don't need or want weak spot in the cooling system getting me towed on vacation. I want some type of metal tee with rubber hoses. Like the good old days. I'm just not sure which metals are compatible with Dexcool and which are not. I'm assuming aluminum is. But I don't know about brass or Steel
_________________________
06 Escalade 6.0L AWD 160k. M1 5w30 Fram TG
03 Maxima 3.5L 152k ST HM 10w30

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#4808199 - 07/08/18 09:00 AM Re: Dexcool compatibilty [Re: LeakySeals]
Chris142 Offline


Registered: 06/05/03
Posts: 16947
Loc: Deplorable in apple valley, ca
I cut those off,remove them then use a new piece of heater hos and slip it past the Barb then clamp it with a hose clamp. Elimating those problematic plastic fittings
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#4808200 - 07/08/18 09:03 AM Re: Dexcool compatibilty [Re: LeakySeals]
AVB Offline


Registered: 05/20/12
Posts: 1328
Loc: Georgia
Anything but pot metal should be fine. I had to extract quite a few of the old metal quick connects on 5.7 intake manifolds. If the manifold was off it was easiest to just chisel out the remains.

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#4808255 - 07/08/18 10:41 AM Re: Dexcool compatibilty [Re: Chris142]
LeakySeals Offline


Registered: 02/18/11
Posts: 6618
Loc: Hudson, NH
Originally Posted By: Chris142
I cut those off,remove them then use a new piece of heater hos and slip it past the Barb then clamp it with a hose clamp. Elimating those problematic plastic fittings

I have rear heat so I think I need a tee? If there was a way to just use hoses I would do that.
_________________________
06 Escalade 6.0L AWD 160k. M1 5w30 Fram TG
03 Maxima 3.5L 152k ST HM 10w30

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