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Classic/Antique Car Repair/R-12 AC
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Question
I have a 1989 Lincoln Town Car with 74,000 miles that is in good condition, except that the freon in the R-12 AC system has leaked down over the last year or so such that the system no long cools well. The o-rings were replaced 5-6 years ago and the system was recharged and worked correctly until last summer, when I noticed a decrease in efficiency. I considering recharging again with dye added to indicate the leak. I consider this more reasonable that converting first and then checking for a leaks and then replacing additional parts plus the conversion. What do you think of this plan?
The only problem is...you will have to recharge the AC before you add the dye, so that will waste R-12 looking for the problem. If you do not use the AC on a semi-regular basis, the o-rings can have dry out over time. However, sometimes the problem is the condenser hose leaking or the condenser itself, but dye is still the only way to be sure. Overall, it maybe cheaper and less problems if you convert first and add the dye. You avoid the cost of R-12 and the R134 may fix the problem. Either way, if you have a leak, it will have to be fixed and recharged and R134 is cheaper than R12. That is the only benefit for converting first.
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Answers by Expert:
Vern Bullock
Expertise
Visit my website at: http://www.classytransportation.com/ I can answer most questions about autos built in the 60's 70's and 80's. Specifically, Lincolns, Rolls Royces and the Excaliburs. Mechanical issues and technical questions are my expertise. I also have a general knowledge of most older automobiles. Keep in mind, I can only provide answers if the questions are very specific and complete. Without details, I can only speculate and that's not good for solving your problem.
Experience
I have owned and maintained Silver Shadows for over 10 years now. I find most mechanics and even Rolls Royce mechanics have very little knowledge about these automobiles. I have researched these cars in quite a bit of detail and can pretty much tell you what is wrong, if you can describe the behavior in detail. I have saved quite a few RR owners a lot of money and aggravation due to improper diagnosis. I am the owner of Classy Transportation, LLC a luxury limousine service specializing in antique cars, classic cars, vintage cars and exotic cars.
Organizations
Classy Transportation, LLC Limousine Service.
Publications
All around the Internet
Education/Credentials
I hold a BS degree in computer science and a MS degree in mechanical engineering.
Awards and Honors
I regularly compete at car shows and average around a dozen awards annually.
Past/Present Clients
See Web site at: http://www.classytransportation.com/
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