Home » Public Forums » GMCnet » [GMCnet] Frozen dash A/C fittings
| [GMCnet] Frozen dash A/C fittings [message #143404] |
Wed, 14 September 2011 19:24  |
ChrisW6ATV
Messages: 26
Registered: September 2005
Location: Hayward, California USA
Karma: 0
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Junior Member |
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Hello-
While we were replacing all of the O-rings on my '74 Sequoia's dash air conditioning system to see if it will hold vacuum/pressure, we ran into two fittings that are stuck so hard that the tubing starts to twist without budging the fittings. Several days of soaking with PB Blaster and in one case Goof-Off did not help at all. Is this common? Do I have no choice other than to replace the entire hoses/tubing assemblies?
I have posted pictures of the two frozen connections on my Web server at the address below:
http://99.92.93.245/gmc/
I appreciate any help with these problems.
Chris Musselman
1974 Sequoia
Hayward, Cal.
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| Re: [GMCnet] Frozen dash A/C fittings [message #143407 is a reply to message #143404] |
Wed, 14 September 2011 19:37  |
Ken Burton
Messages: 10030
Registered: January 2004
Location: Hebron, Indiana
Karma: 10
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Senior Member |
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Kroil is your friend. Soak daily with Kroil and after 5 days they will come loose. A little heat from a propane torch before each soaking will also help. Try to get it warm enough that when you spray on the Kroil you are shock cooling the connection.
Do not burn down the coach with your torch.
Ken Burton - N9KB
76 Palm Beach
Hebron, Indiana
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| Re: [GMCnet] Frozen dash A/C fittings [message #143429 is a reply to message #143427] |
Wed, 14 September 2011 21:32 |
k2gkk
Messages: 4452
Registered: November 2009
Karma: -8
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Senior Member |
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Then as you know, the output air temperature is
quite hot, even on the LOW setting. BE CAREFUL!
I'd advise sweeping the nozzle back and forth
to avoid concentrating too much heat into a
small area at a time. Also, don't get the
nozzle too close to what you are heating or
its surrounding material.
73,
~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~
~~ ~ D C "Mac" Macdonald ~ ~~
~ ~ Amateur Radio - K2GKK ~ ~
~ ~ USAF and FAA, Retired ~ ~
~ ~ ~ Oklahoma City, OK ~ ~ ~
~~ ~ ~ "The Money Pit" ~ ~ ~~
~ ~ ~ ex-Palm Beach, 76 ~ ~ ~
~ www.gmcmhphotos.com/okclb ~
~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~
> Date: Wed, 14 Sep 2011 19:23:53 -0700
> From: rcoaster@pacbell.net
> To: gmclist@temp.gmcnet.org
> Subject: Re: [GMCnet] Frozen dash A/C fittings
>
> Mac-
>
> I do also have one of those HF heat guns, so I can try that as well.
>
> Chris W6ATV
>
>
>
>
> >________________________________
> >From: D C *Mac* Macdonald <k2gkk@hotmail.com>
> >
> >Harbor Freight carries a heat gun and frequently
> >has them on sale. I bought one several months
> >ago and it puts out a LOT of heat (two levels)
> >without fire.
> >
> >Probably wouldn't serve in heavy duty commercial
> >service, but I expect it to serve my intermittent
> >use for many years (probably will outlast ME!).
> >
> >
> >
> >~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~
> >~~ ~ D C "Mac" Macdonald ~ ~~
> >~ ~ Amateur Radio - K2GKK ~ ~
> >~ ~ USAF and FAA, Retired ~ ~
> >~ ~ ~ Oklahoma City, OK ~ ~ ~
> >~~ ~ ~ "The Money Pit" ~ ~ ~~
> >~ ~ ~ ex-Palm Beach, 76 ~ ~ ~
> >~ www.gmcmhphotos.com/okclb ~
> >~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~
> >
> >
> _______________________________________________
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| Re: [GMCnet] Frozen dash A/C fittings [message #143433 is a reply to message #143404] |
Wed, 14 September 2011 21:44 |
 |
Matt Colie
Messages: 8547
Registered: March 2007
Location: S.E. Michigan
Karma: 7
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Senior Member |
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| ChrisW6ATV wrote on Wed, 14 September 2011 20:24 |
Hello-
While we were replacing all of the O-rings on my '74 Sequoia's dash air conditioning system to see if it will hold vacuum/pressure, we ran into two fittings that are stuck so hard that the tubing starts to twist without budging the fittings. Several days of soaking with PB Blaster and in one case Goof-Off did not help at all. Is this common? Do I have no choice other than to replace the entire hoses/tubing assemblies?
I have posted pictures of the two frozen connections on my Web server at the address below:
http://99.92.93.245/gmc/
I appreciate any help with these problems.
Chris Musselman
1974 Sequoia
Hayward, Cal.
|
Chris,
Ken has you on the right path. This is common here in the rust belt. Expect it to take several tries over several days, but these things can usually be made to release. When heating, it is also very clever to have someone else watching from a different angle so he can see what you can't see that you are melting or burning.
Try heating the tubing and cooling with Kroil or aft first, then try heating just the nut and cooling the same way. One of those usually does it.
Goof-off is not for this. The problem is electrolytic corrosion between the nut and the aluminum tubing. It is not any kind of a chemical adhesive.
When you get it loose, clean and grease the tubing.
Matt
Matt & Mary Colie - Chaumière -'73 Glacier 23 - Members GMCMI, GMCGL, GMCES
Electronically Controlled Quiet Engine Cooling Fan with OE Rear Drum Brakes with Applied Control Arms
SE Michigan - Near DTW - Twixt A2 and Detroit
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| Re: [GMCnet] Frozen dash A/C fittings [message #143450 is a reply to message #143433] |
Wed, 14 September 2011 23:05 |
Ken Burton
Messages: 10030
Registered: January 2004
Location: Hebron, Indiana
Karma: 10
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Senior Member |
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You can use grease on the removed tubing prior to re-installation, but I prefer anti-seize which available at most any auto parts store.
Ken Burton - N9KB
76 Palm Beach
Hebron, Indiana
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| Re: [GMCnet] Frozen dash A/C fittings [message #143467 is a reply to message #143426] |
Thu, 15 September 2011 07:16 |
jhbridges
Messages: 8412
Registered: May 2011
Location: Braselton ga
Karma: -74
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Senior Member |
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Your mate's hair dryer also does a good job at this.
--johnny
--- On Thu, 9/15/11, D C *Mac* Macdonald <k2gkk@hotmail.com> wrote:
From: D C *Mac* Macdonald <k2gkk@hotmail.com>
Subject: Re: [GMCnet] Frozen dash A/C fittings
To: gmclist@temp.gmcnet.org
Date: Thursday, September 15, 2011, 2:19 AM
Harbor Freight carries a heat gun and frequently
has them on sale. I bought one several months
ago and it puts out a LOT of heat (two levels)
without fire.
Probably wouldn't serve in heavy duty commercial
service, but I expect it to serve my intermittent
use for many years (probably will outlast ME!).
~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~
~~ ~ D C "Mac" Macdonald ~ ~~
~ ~ Amateur Radio - K2GKK ~ ~
~ ~ USAF and FAA, Retired ~ ~
~ ~ ~ Oklahoma City, OK ~ ~ ~
~~ ~ ~ "The Money Pit" ~ ~ ~~
~ ~ ~ ex-Palm Beach, 76 ~ ~ ~
~ www.gmcmhphotos.com/okclb ~
~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~
> Date: Wed, 14 Sep 2011 19:13:15 -0700
> From: rcoaster@pacbell.net
> To: gmclist@temp.gmcnet.org
> Subject: Re: [GMCnet] Frozen dash A/C fittings
>
>
>
> Ken-
>
> Thank you for the quick response. I do not have a torch, but I could try holding a soldering gun on the outside of the two fittings in each location. I will buy some Kroil and see what happens.
>
> Chris
>
>
>
> >________________________________
> >From: Ken Burton <n9cv@comcast.net>
> >
> >Kroil is your friend. Soak daily with Kroil and after 5 days they will come loose. A little heat from a propane torch before each soaking will also help. Try to get it warm enough that when you spray on the Kroil you are shock cooling the connection.
> >
> >Do not burn down the coach with your torch.
> >--
> >Ken Burton - N9KB
> >76 Palm Beach
> >Hebron, Indiana
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Foolish Carriage, 76 26' Eleganza(?) with beaucoup mods and add - ons.
Braselton, Ga.
I forgive them all, save those who hurt the dogs. They must answer to me in hell
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| Re: [GMCnet] Frozen dash A/C fittings [message #143475 is a reply to message #143467] |
Thu, 15 September 2011 08:04 |
k2gkk
Messages: 4452
Registered: November 2009
Karma: -8
|
Senior Member |
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A hair dryer has very much lower heat output than a proper heat gun.
~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~
~~ ~ D C "Mac" Macdonald ~ ~~
~ ~ Amateur Radio - K2GKK ~ ~
~ ~ USAF and FAA, Retired ~ ~
~ ~ ~ Oklahoma City, OK ~ ~ ~
~~ ~ ~ "The Money Pit" ~ ~ ~~
~ ~ ~ ex-Palm Beach, 76 ~ ~ ~
~ www.gmcmhphotos.com/okclb ~
~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~
> Date: Thu, 15 Sep 2011 05:16:00 -0700
> From: jhbridges@ymail.com
> To: gmclist@temp.gmcnet.org
> Subject: Re: [GMCnet] Frozen dash A/C fittings
>
> Your mate's hair dryer also does a good job at this.
>
> --johnny
>
>
> --- On Thu, 9/15/11, D C *Mac* Macdonald <k2gkk@hotmail.com> wrote:
>
>
> From: D C *Mac* Macdonald <k2gkk@hotmail.com>
> Subject: Re: [GMCnet] Frozen dash A/C fittings
> To: gmclist@temp.gmcnet.org
> Date: Thursday, September 15, 2011, 2:19 AM
>
>
>
> Harbor Freight carries a heat gun and frequently
> has them on sale. I bought one several months
> ago and it puts out a LOT of heat (two levels)
> without fire.
>
> Probably wouldn't serve in heavy duty commercial
> service, but I expect it to serve my intermittent
> use for many years (probably will outlast ME!).
>
>
>
> ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~
> ~~ ~ D C "Mac" Macdonald ~ ~~
> ~ ~ Amateur Radio - K2GKK ~ ~
> ~ ~ USAF and FAA, Retired ~ ~
> ~ ~ ~ Oklahoma City, OK ~ ~ ~
> ~~ ~ ~ "The Money Pit" ~ ~ ~~
> ~ ~ ~ ex-Palm Beach, 76 ~ ~ ~
> ~ www.gmcmhphotos.com/okclb ~
> ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~
>
>
>
>
>
> > Date: Wed, 14 Sep 2011 19:13:15 -0700
> > From: rcoaster@pacbell.net
> > To: gmclist@temp.gmcnet.org
> > Subject: Re: [GMCnet] Frozen dash A/C fittings
> >
> >
> >
> > Ken-
> >
> > Thank you for the quick response. I do not have a torch, but I could try holding a soldering gun on the outside of the two fittings in each location. I will buy some Kroil and see what happens.
> >
> > Chris
> >
> >
> >
> > >________________________________
> > >From: Ken Burton <n9cv@comcast.net>
> > >
> > >Kroil is your friend. Soak daily with Kroil and after 5 days they will come loose. A little heat from a propane torch before each soaking will also help. Try to get it warm enough that when you spray on the Kroil you are shock cooling the connection.
> > >
> > >Do not burn down the coach with your torch.
> > >--
> > >Ken Burton - N9KB
> > >76 Palm Beach
> > >Hebron, Indiana
>
> _______________________________________________
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> Unsubscribe or Change List Options:
> http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
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> Unsubscribe or Change List Options:
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| Re: [GMCnet] Frozen dash A/C fittings [message #143488 is a reply to message #143475] |
Thu, 15 September 2011 11:22 |
jhbridges
Messages: 8412
Registered: May 2011
Location: Braselton ga
Karma: -74
|
Senior Member |
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|
Well, I went and looked. My heat gun (Milwaukee) inputs 1200 Watts. Mate'a hair dryer inputs 1500 Watts. Now, it does help to slow the airflow on the dryer so it will get hotter, but if we're gonna look at 'heat', the dryer produces more. As a practical matter, on an A/C fitting - normally aluminum - the hair dryer works just fine. When we do teflon <tm> heatshrink, we need the heat gun.
--johnny
--- On Thu, 9/15/11, D C *Mac* Macdonald <k2gkk@hotmail.com> wrote:
From: D C *Mac* Macdonald <k2gkk@hotmail.com>
Subject: Re: [GMCnet] Frozen dash A/C fittings
To: gmclist@temp.gmcnet.org
Date: Thursday, September 15, 2011, 1:04 PM
A hair dryer has very much lower heat output than a proper heat gun.
~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~
~~ ~ D C "Mac" Macdonald ~ ~~
~ ~ Amateur Radio - K2GKK ~ ~
~ ~ USAF and FAA, Retired ~ ~
~ ~ ~ Oklahoma City, OK ~ ~ ~
~~ ~ ~ "The Money Pit" ~ ~ ~~
~ ~ ~ ex-Palm Beach, 76 ~ ~ ~
~ www.gmcmhphotos.com/okclb ~
~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~
> Date: Thu, 15 Sep 2011 05:16:00 -0700
> From: jhbridges@ymail.com
> To: gmclist@temp.gmcnet.org
> Subject: Re: [GMCnet] Frozen dash A/C fittings
>
> Your mate's hair dryer also does a good job at this.
>
> --johnny
>
>
> --- On Thu, 9/15/11, D C *Mac* Macdonald <k2gkk@hotmail.com> wrote:
>
>
> From: D C *Mac* Macdonald <k2gkk@hotmail.com>
> Subject: Re: [GMCnet] Frozen dash A/C fittings
> To: gmclist@temp.gmcnet.org
> Date: Thursday, September 15, 2011, 2:19 AM
>
>
>
> Harbor Freight carries a heat gun and frequently
> has them on sale. I bought one several months
> ago and it puts out a LOT of heat (two levels)
> without fire.
>
> Probably wouldn't serve in heavy duty commercial
> service, but I expect it to serve my intermittent
> use for many years (probably will outlast ME!).
>
>
>
> ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~
> ~~ ~ D C "Mac" Macdonald ~ ~~
> ~ ~ Amateur Radio - K2GKK ~ ~
> ~ ~ USAF and FAA, Retired ~ ~
> ~ ~ ~ Oklahoma City, OK ~ ~ ~
> ~~ ~ ~ "The Money Pit" ~ ~ ~~
> ~ ~ ~ ex-Palm Beach, 76 ~ ~ ~
> ~ www.gmcmhphotos.com/okclb ~
> ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~
>
>
>
>
>
> > Date: Wed, 14 Sep 2011 19:13:15 -0700
> > From: rcoaster@pacbell.net
> > To: gmclist@temp.gmcnet.org
> > Subject: Re: [GMCnet] Frozen dash A/C fittings
> >
> >
> >
> > Ken-
> >
> > Thank you for the quick response. I do not have a torch, but I could try holding a soldering gun on the outside of the two fittings in each location. I will buy some Kroil and see what happens.
> >
> > Chris
> >
> >
> >
> > >________________________________
> > >From: Ken Burton <n9cv@comcast.net>
> > >
> > >Kroil is your friend. Soak daily with Kroil and after 5 days they will come loose. A little heat from a propane torch before each soaking will also help. Try to get it warm enough that when you spray on the Kroil you are shock cooling the connection.
> > >
> > >Do not burn down the coach with your torch.
> > >--
> > >Ken Burton - N9KB
> > >76 Palm Beach
> > >Hebron, Indiana
>
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
_______________________________________________
GMCnet mailing list
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GMCnet mailing list
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Foolish Carriage, 76 26' Eleganza(?) with beaucoup mods and add - ons.
Braselton, Ga.
I forgive them all, save those who hurt the dogs. They must answer to me in hell
|
|
|
|
| Re: [GMCnet] Frozen dash A/C fittings [message #143829 is a reply to message #143404] |
Mon, 19 September 2011 13:56 |
George DV
Messages: 132
Registered: August 2004
Karma: 0
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Senior Member |
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Try HEAT
as in a Bernz torch
George DV
______________
/ ][ ] [ ] [ ] \
o O---------O-----O-o
1976 GLENBROOK
TZE166V 100976
455 HEI 3.70
225 UniroyalsAlcoas
Beautiful Upstate NY
----- Original Message -----
From: "Christopher Musselman" <rcoaster@pacbell.net>
To: "GMCnet-2009 address" <gmclist@temp.gmcnet.org>
Sent: Wednesday, September 14, 2011 8:24 PM
Subject: [GMCnet] Frozen dash A/C fittings
> Hello-
>
> While we were replacing all of the O-rings on my '74 Sequoia's dash air
> conditioning system to see if it will hold vacuum/pressure, we ran into
> two fittings that are stuck so hard that the tubing starts to twist
> without budging the fittings. Several days of soaking with PB Blaster and
> in one case Goof-Off did not help at all. Is this common? Do I have no
> choice other than to replace the entire hoses/tubing assemblies?
>
> I have posted pictures of the two frozen connections on my Web server at
> the address below:
>
> http://99.92.93.245/gmc/
>
>
> I appreciate any help with these problems.
>
> Chris Musselman
> 1974 Sequoia
> Hayward, Cal.
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
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