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Tool Talk Discussion Forum

Auto air conditioner

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Bob - MI

06-23-2007 06:44:22




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My daughter's '96 Taurus has a leak in the system. I have ordered a gauge set and a vacuum pump from Harbor freight. I suspect that there are seal leaks in the lines based on some internet searching. I wonder if there are any tips you guys have such as should I use red dye leak detector as opposed to UV detector? Any tricks that I should know about? The service manual for this car does not give any pressures to recharge to and I am betting that's a liability issue for the publisher. I don't want to put a lot of money in this car but I do want to get the A/C back on line.

Thanks in advance!!

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Bryan in iowa

06-26-2007 10:46:27




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 Re: Auto air conditioner in reply to Bob - MI, 06-23-2007 06:44:22  
don't try to charge it with gauges . !34 systems need to be charged by weight to do it right . I always give systems shot of YELLOW dye oil in it. Works great , any cheap black light will work to find leaks , yellow tint glasses help to really make them show up . Any question feel free to calll me at shop ,319-373=0636
Bryan



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Bob - MI

06-27-2007 10:22:41




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 Re: Auto air conditioner in reply to Bryan in iowa, 06-26-2007 10:46:27  
Thank you for the phone number Bryan. I will take you up on the invitation to call.

Bob



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kito169

06-25-2007 20:17:47




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 Re: Auto air conditioner in reply to Bob - MI, 06-23-2007 06:44:22  
I've read on packaging that red is for r12 only. it is hard to find anymore.



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lucasss

06-24-2007 11:43:12




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 Re: Auto air conditioner in reply to Bob - MI, 06-23-2007 06:44:22  

i put a dye charge in every system i fill from scratch. the little light and goggles are now available for about 25.00 at auto parts stores. on your 96, id be sure to at least replace the orings on the high side because they get hot.. and the low side if you have the time.there can also be leaks in the compressor shaft seal,so try to take a look there too. . lucas



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Ken Crisman

06-23-2007 07:49:58




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 Re: Auto air conditioner in reply to Bob - MI, 06-23-2007 06:44:22  
It's too bad you already ordered the items . I have about every (new top-line names )tools needed to start air conditioning work .I never went anywhere with it . Gave up when they changed the freon .If interested , email me . Good luck & God bless, Ken



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Bob

06-23-2007 06:53:44




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 Re: Auto air conditioner in reply to Bob - MI, 06-23-2007 06:44:22  
Start by looking for damp, oily spots around fittings and the compressor clutch BEFORE dumping any of the dye crap in the system, or borrow a refigerant leak detector. The "O" rings in the quick-connect fittings would be the first suspects.

They don't publish pressure numbers, 'cause they're next to meaningless, as they vary with ambient temperature.

The system is charged by WEIGHT, and, since you are apparently planning to evacuate it, simply install the amount of refrigerant (by weight) called for on the system decal, or the shop manual.

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Bob - MI

06-23-2007 11:08:19




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 Re: Auto air conditioner in reply to Bob, 06-23-2007 06:53:44  
Thanks Bob. I have seen the oily areas around the clamps and based on some trouble reports for this car it appears that the seals at the clamps fail. There is supposed to be a re-designed seal out for this car.

I was concerned about the dye too. I don't like those "fix in a can" approaches. They all seem to be more trouble in the end. I didn't want to invest in a black light for this project if I didn't have to.

Thanks again to both you and Ken.

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