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10-26-2017
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#1 |
 Join Date: Oct 2017
Location: Seattle
Posts: 6
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1991 A/C Evaporator Tube
Started my car up today and was backing out of my garage then a loud pop and hissing from the passenger side under the hood. Shut it down and checked things out. The coolant temp switch on the evaporator tube for the A/C condenser had broken off at where the threaded fitting/valve comes up. Couple of questions for you guys. Is there anywhere I can find a replacement tube? It is discontinued, of course, and only one listed that I can find is on EBay, White Racing Products, and the picture is not what mine looks like, no fittings for switches. They don't answer their phone so I am suspect already of doing any business with them. Any help please would be appreciated. Thanks, Keith
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10-26-2017
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#2 |
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Join Date: Jun 2015
Location: Texas
Posts: 530
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Re: 1991 A/C Evaporator Tube
I have no idea about finding a new tube, but maybe you can get the switch out with a sharp chisel and thread a new one in.
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10-26-2017
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#3 |
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Join Date: Oct 2017
Location: Seattle
Posts: 6
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Re: 1991 A/C Evaporator Tube
The threaded part broke off inside the switch and it backed right out. It contains a valve that looks like a tire valve on a wheel. In other words it broke at the pipe level so the valve needs to be somehow attached back on the pipe such as soldered/welded or maybe some type of JB Weld?
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10-27-2017
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#4 |
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Join Date: Oct 2004
Posts: 1,890
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Re: 1991 A/C Evaporator Tube
I'd call locally to older established AC repair facilities and ask about "aluminum brazing" - being an R12 system I believe TIG isn't an option. There's very likely differing opinions but ....
I wouldn't remove the line until I found a shop that says they can repair and I'd be inclined to let them do the removal for the repair. It's entirely likely that they might want to splice a section. |
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10-27-2017
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#5 |
 
Join Date: Jul 2007
Location: Bartlett, IL
Posts: 7,169
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Re: 1991 A/C Evaporator Tube
Can you post a picture of the line you need?
__________________
1990 Corvette ZR-1 #1051 Watson Headers (2" Primary) - Flowmaster Cats - Borla Catback Late Model IH - Plenum Coilovers - 4.10s Custom Interior NCM Lifetime Member #978 |
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10-27-2017
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#6 |
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Join Date: Oct 2017
Location: Seattle
Posts: 6
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Re: 1991 A/C Evaporator Tube
Thanks for the replies. It's the bottom pipe/ hose, #15 in the diagram.
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10-27-2017
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#7 |
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Join Date: Jul 2007
Location: Bartlett, IL
Posts: 7,169
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Re: 1991 A/C Evaporator Tube
That is the high pressure hard line.. I would think the L98 for 90-91 should be the same..
So is the fitting completely gone? or the inside threads are gone where the schraeder valve was?
__________________
1990 Corvette ZR-1 #1051 Watson Headers (2" Primary) - Flowmaster Cats - Borla Catback Late Model IH - Plenum Coilovers - 4.10s Custom Interior NCM Lifetime Member #978 |
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10-27-2017
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#8 | |
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Join Date: Oct 2004
Posts: 1,890
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Re: 1991 A/C Evaporator Tube
Quote:
Actually NOT - it's '90 & '91 LT5 only |
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10-27-2017
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#9 |
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Join Date: Jul 2007
Location: Bartlett, IL
Posts: 7,169
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Re: 1991 A/C Evaporator Tube
huh.. wonder why?
I cannot get to mine to look at it.. a picture of the actual broken line would help
__________________
1990 Corvette ZR-1 #1051 Watson Headers (2" Primary) - Flowmaster Cats - Borla Catback Late Model IH - Plenum Coilovers - 4.10s Custom Interior NCM Lifetime Member #978 |
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10-27-2017
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#10 |
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Join Date: Oct 2017
Location: Seattle
Posts: 6
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Re: 1991 A/C Evaporator Tube
The threaded portion of the pipe with the valve in it broke at the base and was inside the switch/sensor. Here is a picture.
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