Thermal Expansion Valve Replace
Thread Starter
Instructor
Joined: Apr 2022
Posts: 125
Likes: 9
From: Chattanooga, TN
Thermal Expansion Valve Replace
My AC wouldn't blow cold air, and a leak was detected back by thermal expansion valve by a local shop. They quoted me $550. I said no way as I do all my own wrenching for the most part.
I can't seem to find any instructions on this, except for removing the intake manifold and it is back there on the firewall. I do have the GM shop manual and have watched a few good videos on intake manifold removal, doesn't look that bad.
Is this all there is to it? replace the intake manifold gaskets, o rings for the TXV , recharge the system with a vacuum. Anything else. Am I missing anything?
I don't want to have my intake manifold out sitting there because I missed something. This is my daily driver(I do have a backup car also), but rather get this done in a weekend or sooner.
Any help is greatly appreciated!
I can't seem to find any instructions on this, except for removing the intake manifold and it is back there on the firewall. I do have the GM shop manual and have watched a few good videos on intake manifold removal, doesn't look that bad.
Is this all there is to it? replace the intake manifold gaskets, o rings for the TXV , recharge the system with a vacuum. Anything else. Am I missing anything?
I don't want to have my intake manifold out sitting there because I missed something. This is my daily driver(I do have a backup car also), but rather get this done in a weekend or sooner.
Any help is greatly appreciated!
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From: Cape Coral, Florida
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Yep, with Freon recovery so your not just dumping that into the atmosphere if line is still charged, the actual work, followed by vacuum of the system to boil out any humidity that got in the lines (in some cases, dry may need to be replace as well), followed by recharging the system.
So on the ops case, if there any pressure still left in the lines, or has humidity gotten into the system long term to causes problems instead.
Also, while you have the system apart, make sure to change the accumulator (in line filter), and it O ring as well.
https://www.corvetteforum.com/forums...and-r134a.html
This will at least save you the labor cost of part swaps, and if no leaks in the system when they go to put the system under a vacuum to boil out any humility, then only looking at about $200 for them to recharge the system.
So on the ops case, if there any pressure still left in the lines, or has humidity gotten into the system long term to causes problems instead.
Also, while you have the system apart, make sure to change the accumulator (in line filter), and it O ring as well.
https://www.corvetteforum.com/forums...and-r134a.html
This will at least save you the labor cost of part swaps, and if no leaks in the system when they go to put the system under a vacuum to boil out any humility, then only looking at about $200 for them to recharge the system.
Thread Starter
Instructor
Joined: Apr 2022
Posts: 125
Likes: 9
From: Chattanooga, TN
Yep, with Freon recovery so your not just dumping that into the atmosphere if line is still charged, the actual work, followed by vacuum of the system to boil out any humidity that got in the lines (in some cases, dry may need to be replace as well), followed by recharging the system.
So on the ops case, if there any pressure still left in the lines, or has humidity gotten into the system long term to causes problems instead.
Also, while you have the system apart, make sure to change the accumulator (in line filter), and it O ring as well.
https://www.corvetteforum.com/forums...and-r134a.html
This will at least save you the labor cost of part swaps, and if no leaks in the system when they go to put the system under a vacuum to boil out any humility, then only looking at about $200 for them to recharge the system.
So on the ops case, if there any pressure still left in the lines, or has humidity gotten into the system long term to causes problems instead.
Also, while you have the system apart, make sure to change the accumulator (in line filter), and it O ring as well.
https://www.corvetteforum.com/forums...and-r134a.html
This will at least save you the labor cost of part swaps, and if no leaks in the system when they go to put the system under a vacuum to boil out any humility, then only looking at about $200 for them to recharge the system.
have a part number for a 2005?
