A/C Orifice Tube
02-26-2009, 08:34 PM
#1
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A/C Orifice Tube I have converted most of my A/C system to a LS1 style except for the Evap, since I'm using my 93-97 Evap and the fittings are different the lines need to be cut and welded together I want to make sure there will be a Orifice tube somewhere in the system. Can someone tell me where it's located in the 98-02 system & the 93-97 System?
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03-02-2009, 09:13 AM
#8
How do you plan on welding that aluminum tube? Usually any attempt at this results in failure.
The orifice tube goes in the liquid line at the location in the pic.
The orifice tube goes in the liquid line at the location in the pic.
Last edited by 9000th01ss; 03-18-2009 at 12:17 AM.
03-02-2009, 10:48 AM
#10
93-97 don't use an orifice tube.
As much of a pain in the *** it might be, I'd put the LS1 type evaporator in it.
I've done AC work for 16 years, started HVAC school in 1990. I've had access to the most modern aluminum/aluminum welding materials from hot welding to cold epoxies. To this day there is no effective permanent weld available for aluminum AC lines. If there was we'd be doing $120 repairs instead of $1800 replacements.
I have done my own custom automotive AC work as well.
The problem you have is adapting metric to SAE lines. Starting in the 1994 build date the refrigerant was switched to 134a and at the same time all the fittings were switched to metric.
I have taken hard aluminum lines and had rubber sections spliced into them so it would end up with an SAE fitting on one side and a metric on the other (crimped fittings, just like factory). I have also joined two aluminum lines with a flare union (NOT a crimp union) and is still working today, it's ugly but it's well hidden. I didn't even think it would work but it's going on six years now.
As much of a pain in the *** it might be, I'd put the LS1 type evaporator in it.
I've done AC work for 16 years, started HVAC school in 1990. I've had access to the most modern aluminum/aluminum welding materials from hot welding to cold epoxies. To this day there is no effective permanent weld available for aluminum AC lines. If there was we'd be doing $120 repairs instead of $1800 replacements.
I have done my own custom automotive AC work as well.
The problem you have is adapting metric to SAE lines. Starting in the 1994 build date the refrigerant was switched to 134a and at the same time all the fittings were switched to metric.
I have taken hard aluminum lines and had rubber sections spliced into them so it would end up with an SAE fitting on one side and a metric on the other (crimped fittings, just like factory). I have also joined two aluminum lines with a flare union (NOT a crimp union) and is still working today, it's ugly but it's well hidden. I didn't even think it would work but it's going on six years now.
03-02-2009, 11:14 AM
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93-97 don't use an orifice tube.
As much of a pain in the *** it might be, I'd put the LS1 type evaporator in it.
I've done AC work for 16 years, started HVAC school in 1990. I've had access to the most modern aluminum/aluminum welding materials from hot welding to cold epoxies. To this day there is no effective permanent weld available for aluminum AC lines. If there was we'd be doing $120 repairs instead of $1800 replacements.
I have done my own custom automotive AC work as well.
The problem you have is adapting metric to SAE lines. Starting in the 1994 build date the refrigerant was switched to 134a and at the same time all the fittings were switched to metric.
I have taken hard aluminum lines and had rubber sections spliced into them so it would end up with an SAE fitting on one side and a metric on the other (crimped fittings, just like factory). I have also joined two aluminum lines with a flare union (NOT a crimp union) and is still working today, it's ugly but it's well hidden. I didn't even think it would work but it's going on six years now.
As much of a pain in the *** it might be, I'd put the LS1 type evaporator in it.
I've done AC work for 16 years, started HVAC school in 1990. I've had access to the most modern aluminum/aluminum welding materials from hot welding to cold epoxies. To this day there is no effective permanent weld available for aluminum AC lines. If there was we'd be doing $120 repairs instead of $1800 replacements.
I have done my own custom automotive AC work as well.
The problem you have is adapting metric to SAE lines. Starting in the 1994 build date the refrigerant was switched to 134a and at the same time all the fittings were switched to metric.
I have taken hard aluminum lines and had rubber sections spliced into them so it would end up with an SAE fitting on one side and a metric on the other (crimped fittings, just like factory). I have also joined two aluminum lines with a flare union (NOT a crimp union) and is still working today, it's ugly but it's well hidden. I didn't even think it would work but it's going on six years now.
