| [GMCnet] Duracool sealant [message #275181] |
Mon, 06 April 2015 12:44  |
emerystora
Messages: 4442
Registered: January 2004
Karma: 13
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Senior Member |
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No, I don’t use sealant in my air conditioner systems. I think there is potential for it to gunk up and clog the system. If I have a leak I prefer to find it and repair it properly.
Since “sniffers” don’t work for hydrocarbons (although I have read there is a very expensive one available), I would suggest that if you think you have a leak, use nitrogen or regular compressed air to charge the system up to about 100 psi and then use a bubble solution on the outside. Use one made for detecting propane leaks. However, if there is a leak in the evaporator in the heater box you won’t see it unless you remove the cover of the box. A sniffer probably wouldn’t find that leak either.
Emery Stora
77 Kingsley
Frederick, CO
> On Apr 6, 2015, at 11:25 AM, Pete Smith wrote:
>
> Emory, Did you use the "duraseal" mentioned in the article?
>
> Have yet to read anything bad about Duracool so I do see it in my future :)
>
>
> Pete
>
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| Re: [GMCnet] Duracool sealant [message #275196 is a reply to message #275181] |
Mon, 06 April 2015 15:30  |
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USAussie
Messages: 15912
Registered: July 2007
Location: Sydney, Australia
Karma: 6
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Emery,
I had a leak in Double Trouble's A/C system that John Sharpe found in a heartbeat, he spotted a "wet" fitting where lube oil had
accumulated. We fixed that leak several years ago and the system has stayed charged.
I agree with you that putting sealant in the system is not the best fix, however, if the leak is in an area that is not fixable (I
know that's highly unlikely) I would use it as a last ditch effort.
It should be noted that Dura Cool says it will not fix moving seals such as the compressor clutch seal.
Regards,
Rob M.
-----Original Message-----
From: Emery Stora
No, I don't use sealant in my air conditioner systems. I think there is potential for it to gunk up and clog the system. If I have
a leak I prefer to find it and repair it properly.
Since "sniffers" don't work for hydrocarbons (although I have read there is a very expensive one available), I would suggest that if
you think you have a leak, use nitrogen or regular compressed air to charge the system up to about 100 psi and then use a bubble
solution on the outside. Use one made for detecting propane leaks. However, if there is a leak in the evaporator in the heater box
you won't see it unless you remove the cover of the box. A sniffer probably wouldn't find that leak either.
Emery
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Regards,
Rob M. (USAussie)
The Pedantic Mechanic
Sydney, Australia
'75 Avion - AUS - The Blue Streak TZE365V100428
'75 Avion - USA - Double Trouble TZE365V100426
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| Re: [GMCnet] Duracool sealant [message #275204 is a reply to message #275196] |
Mon, 06 April 2015 17:19 |
emerystora
Messages: 4442
Registered: January 2004
Karma: 13
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Senior Member |
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Emery
> On Apr 6, 2015, at 2:3 Rob mueller posted
> It should be noted that Dura Cool says it will not fix moving seals such as the compressor clutch seal.
>
> Regards,
> Rob M.
>
Yes, that is correct for a worn out seal. But seals have a bit of oil retained on the surface which prevents leakage of the refrigerant. When the GMC sits for a long time without the compressor running and "resetting" that seal it can leak refrigerant. Which is why I recommend running the air conditioner for a little bit even in the winter.
Emery Stora
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