A/C problem after R134a conversion, please help.

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Think about where the desicant is located in the system Sal. The compressor is downstream and it put them in the evap core so they had to go through the compressor first. Some of it was broken apart and it's basically sand then. I'd bet some of it is even in the condensor so you might want to replace it as well.

OK, so i will get another compressor.

As far as the condenser, could it be flushed out since it is new?
 
Upgrade evaporator

Found an evaporator which will fit in our A/C box with some minor modifications.

This evaporator has 21 tubes compared to our original having 16 tubes. It has denser tube location & smaller tubes, somewhat like the upgrade for 134a cars. It is almost 1" longer, however, minor modifications to the box & it will fit.

Only drawback, the low pressure line needs to be modified, I'll be researching the issues tomorrow.

The evaporator is listed at Advance Auto Parts as a direct replacement for the GN - however it is not a direct fit. Advance part # 54277, less than $100.
 
OK, so i will get another compressor.

As far as the condenser, could it be flushed out since it is new?

I'd flush it really well Sal, but honestly you'll need to take it off to do it right.

Found an evaporator which will fit in our A/C box with some minor modifications.

This evaporator has 21 tubes compared to our original having 16 tubes. It has denser tube location & smaller tubes, somewhat like the upgrade for 134a cars. It is almost 1" longer, however, minor modifications to the box & it will fit.

Only drawback, the low pressure line needs to be modified, I'll be researching the issues tomorrow.

The evaporator is listed at Advance Auto Parts as a direct replacement for the GN - however it is not a direct fit. Advance part # 54277, less than $100.

Tell us how it comes out Roger. A better option would be great.:cool: Now if only they'd make a better condensor for our cars.:frown:
 
Updated Evaporator

My A/C guy who did my rubber hoses (they did not leak - good job) refused to work on the evaporator.

I left it with my welder who did my 3rd cross flow muffler. He said pick it up in 2 days.

Working on submitting pics.
 
I'd flush it really well Sal, but honestly you'll need to take it off to do it right.



Tell us how it comes out Roger. A better option would be great.:cool: Now if only they'd make a better condensor for our cars.:frown:

i will remove it Friday and flush the hell out of it. Its a really nice one with smaller tubes than my original.

My A/C guy who did my rubber hoses (they did not leak - good job) refused to work on the evaporator.

I left it with my welder who did my 3rd cross flow muffler. He said pick it up in 2 days.

Working on submitting pics.


Makes me nervous because i just bought the Murray Evap Core from Advance on Saturday and have not removed the old one to see the difference you are refering to...
 
IE isn't working right & I am having trouble putting pics on this post.

If it worked - the left evaporator is new with too short a tube to reach the drier. My welder is working on extending it. The right image is original from my TR.

Note the new evaporator is almost 1" longer, however, little modification to the box is needed to get it to fit.
 

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IE isn't working right & I am having trouble putting pics on this post.

If it worked - the left evaporator is new with too short a tube to reach the drier. My welder is working on extending it. The right image is original from my TR.

Note the new evaporator is almost 1" longer, however, little modification to the box is needed to get it to fit.

Hmmm, pic of a cute white dog....

can you email me pics? i sent you a PM.
 
OOps - wrong image - trying again

If it worked - the left evaporator is new with too short a tube to reach the drier. My welder is working on extending it. The right image is original from my TR.

Note the new evaporator is almost 1" longer, however, little modification to the box is needed to get it to fit.

OK, I finally got it- whew.
 

Attachments

OOps - wrong image - trying again

If it worked - the left evaporator is new with too short a tube to reach the drier. My welder is working on extending it. The right image is original from my TR.

Note the new evaporator is almost 1" longer, however, little modification to the box is needed to get it to fit.

OK, I finally got it- whew.

Is he going to remove the tube off the old core and install it on the new core?
 
Is he going to remove the tube off the old core and install it on the new core?

My tube on the old core is bad/leaking at the fitting. He'll have to put an extension in the new tube, however, if not for the leak, he probably could reuse the old tube.
 
After 20 plus years I'm sure the hoses are begining to rot so take a very good look at them.

That's exactly the problem I'm having right now. The aluminium "block" with the two aluminium tubes at the rear of the compressor probably has a "hairline" crack in it and is leaking. :rolleyes: They're the original ones, are 23 years old and have had their share of wear and tear.:eek: So I ordered brand new CHROMED ones from Southeast Turbo Performance (Part# CRM 1002). I just hope everything'll be fine after that...

Claude. :redface:

Link: Buick, turbo buick, grand national, ttype, gnx, 3.8, regal, 84-87
 
That's exactly the problem I'm having right now. The aluminium "block" with the two aluminium tubes at the rear of the compressor probably has a "hairline" crack in it and is leaking. :rolleyes: They're the original ones, are 23 years old and have had their share of wear and tear.:eek: So I ordered brand new CHROMED ones from Southeast Turbo Performance (Part# CRM 1002). I just hope everything'll be fine after that...

Claude. :redface:

Link: Buick, turbo buick, grand national, ttype, gnx, 3.8, regal, 84-87

Hopefully you won't run into the problem I did - the new lines leaked at the hose crimped to the aluminum lines. A hard leak to find due to it changing with a very little movement of the lines. I finally had to use shop air & soapy water to find the leak.
 
OOps ..........Note the new evaporator is almost 1" longer, however, little modification to the box is needed to get it to fit.
..............

Roger, if you do not want the evap I shipped today, just refuse the box and it will be returned to me, thanks. :confused:
 
Roger, if you do not want the evap I shipped today, just refuse the box and it will be returned to me, thanks. :confused:

Nick,
Many opportunities for a major issue at this point. I'm thinking I would be wise to have a backup plan. Thanks for sending me an evap, even if I find I won't need it, I'll at least have a good original evap on hand.
 
Roger, i compared the evap cores as you did and find what you said to be true. I searched online and found out the original TR evap core has been discontinued. Mine does NOT leak however it has a lot of trash in it. After i removed it yesterday i notice there is a puddle of oil at the bottom of the tank. I intend to flush the hell out of it. My only reason for replacing it in the first place was because of the trash in it. Now that i have it out i can do a much better job of flushing it since i can now turn it upside down and what not. I did try to force the new core in my box but i did not like the way it sits and i do not want to try and modify anything because i dont think i can make it work. Good luck with your project and please take pictures of any and all modificatons.

ps. You said your fitting was bad? why not cut off your tube and remove bad fitting, cut off tube from new core and install new fitting on old tube and weld old tube with new fitting back on your old core?
 
New core has been modified & does not leak. New leak where high pressure line from compressor mates with condensor, will try to use plumbing compression connector if it will fit. Unable to purchase one tonight - no parking at Lowes (high school graduation) - will work on it again tomorrow.
 
**Update**

I am really disappointed. I dont know what i am doing wrong. The same exact thing happened this time with:

New Compressor
New Evap Core
New Orifice Tube

I flushed the condenser and no trash was present. The only thing i have not replaced are the lines but i did blow them out with compressed air.


Vacuumed down for 6 hours.

Turn on Car, Jumped connector and AC clutch engaged. Open low side and freon barely sucking in. Took about 5 mins for 1 can and not the whole can. Used another can, would not take it at all.

I am really pissed and feel like i just threw a whole bunch of money away...
 
Sal-give me a call and I ll see if I can go over this with you-matt 347-680-8642, before you jumped out the lp switch and started the car you should have just hooked up your refer hoses, purged the lines of any air and non condensible and statically charged the system with refrigerant until both sides equalized then started the car and proceed to finish charging system.
 
By the way was the car converted just now to 134 from r-12-, what kind and how much oil was put in?
 
You should have a gasket or o-rings where the condenser HP line meets the compressor-these pressures sometimes get up to 300-350 lbs -I would not put any kind of compression fittings on these lines-dangerous.
 
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