How to evacuate and "pull" vacuum on an R134a car AC system
Proper way to "pull" a vacuum from a discharged auto AC system. This applies to the newer R134a refrigerant systems as well as the older R12 systems.
It is not only necessary, but critical that you evacuate your AC system IF it has been opened to the atmoshere. However, if you are just adding additional R134A Freon to your system, evacuation is not required.
Automotive A/C Vacuum Pumps are used to remove air and moisture from an A/C system that has been worked on. If, for example, the A/C system has been repaired(compressor, condensor, evaporator, accummulator,or whatever), this is when evacuation is required. During evacuation, the air is removed from the a/c system and at 28" pounds of vacuum, the moisture begins to boil. The moisture now becomes vapor and is drawn out of the system by the vacuum pump.
At the end of the evacuation, you have a system that is free of any air or moisture. If you do not evacuate your system prior to charge, it may work for awhile, but the moisture will eventually cause corrosion and other unwanted chemical reactions in your A/C system. This will shorten the operating life of your A/C system.
I stand corrected on questions regarding shrader valves. There are tools that can be used to remove/replace shrader valvse without discharging your AC system. Check out this video:
http://www.youtube.com/watch?v=Cfm6m01FfeI
and here is another good one:
http://www.youtube.com/watch?v=M4ZMVcDvJzU
How To Recharge an AC System - EricTheCarGuy
Visit me at: http://www.ericthecarguy.com/
Finding leaks video: http://www.youtube.com/watch?v=95RdGLFIbL8
Basics of AC: http://www.youtube.com/watch?v=w17DpGCcRj8
AC Performance Test: http://www.youtube.com/watch?v=XU_A4wNuHXI
AC pressures: http://www.aircondition.com/tech/questions/82/
AC pressures 2: http://www.idqusa.com/faqs.php?faq=74&faq_id=74&category_id=18
As I said in the video you need to be responsible when dealing with refrigerant, also in some locations it's not legal for you to perform your own AC work so keep that in mind and observe your local laws.
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Due to factors beyond the control of EricTheCarGuy, it cannot guarantee against unauthorized modifications of this information, or improper use of this information. EricTheCarGuy assumes no liability for property damage or injury incurred as a result of any of the information contained in this video. EricTheCarGuy recommends safe practices when working with power tools, automotive lifts, lifting tools, jack stands, electrical equipment, blunt instruments, chemicals, lubricants, or any other tools or equipment seen or implied in this video. Due to factors beyond the control of EricTheCarGuy, no information contained in this video shall create any express or implied warranty or guarantee of any particular result. Any injury, damage or loss that may result from improper use of these tools, equipment, or the information contained in this video is the sole responsibility of the user and not EricTheCarGuy.
How To Find and Repair AC Leaks - EricTheCarGuy
Visit me at: http://www.ericthecarguy.com/
How To Recharge an AC System: http://www.youtube.com/watch?v=lglPJuBXVeE
Basics of AC: http://www.youtube.com/watch?v=w17DpGCcRj8
AC Performance Test: http://www.youtube.com/watch?v=XU_A4wNuHXI
I suppose this has been a long time coming but for me I wanted to make sure that I made a video that would be useful to you as well as emphasized the importance of good practices when working with AC. Keep in mind refrigerant is a CFC meaning that it pretty much kills the ozone layer and if you don't respect that you WILL cause environmental damage even a little adds up so please follow the precautions in this video when working on an AC system. The other thing about AC is that it involves a lot more than just shooting a can of refrigerant into the system when it's not working right there are many systems that come into play that you need to consider such as; the health of the cooling system, cooling fan operation, the mechanical operation of the components of the system, the operation of the HVAC inside the dash, and the electronics so keep in mind if you're having a problem with your AC it could be much more than just a simple leak. I'll get off my soap box now.
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Due to factors beyond the control of EricTheCarGuy, it cannot guarantee against unauthorized modifications of this information, or improper use of this information. EricTheCarGuy assumes no liability for property damage or injury incurred as a result of any of the information contained in this video. EricTheCarGuy recommends safe practices when working with power tools, automotive lifts, lifting tools, jack stands, electrical equipment, blunt instruments, chemicals, lubricants, or any other tools or equipment seen or implied in this video. Due to factors beyond the control of EricTheCarGuy, no information contained in this video shall create any express or implied warranty or guarantee of any particular result. Any injury, damage or loss that may result from improper use of these tools, equipment, or the information contained in this video is the sole responsibility of the user and not EricTheCarGuy.
Part 2. How to properly charge an auto AC R134a refrigerant air conditioning system.
Part 2 of "How to properly charge up an auto R134a AC system" using pressure gauge and off the shelf 12 ounce R134a refrigerant.
Note about charging Liquid (can upside down) versus Vapor (can right side up):
The freon can should be upright so that refrigerant "vapor" is drawn into the low side. Remember that the Low side, also known as the suction side, normally operates as a "Low Pressure Vapor" state that is drawn directly into the compressor. You don't want to "slug" the compressor by inverting the can and adding freon in the liquid state. A caveat to the above statement is that sometimes it may be necessary to invert the FIRST can(initial charge) for a few seconds at a time to "prime" the system with freon so that the compressor will engage. But you should never charge an AC system with pure liquid refrigerant. The compressors job is to "compress" refrigerant vapor coming from the Low side. The compressor is not designed to compress liquid and can be damaged if too much liquid is put into the low side.
Finding and fixing an A/C Leak
Using sound to find an a/c leak, and replacing the service valve without discharging the system
auto ac diagnosis
Mitsubishi Montero Sport. 2001. AC works well until the belt breaks. with gauges applied. High side trips compressor off at 350. When rpms are raised, belt slips. My guess, the orifice is partially blocked.(update 8/4/2011) parts ordered, I will be replacing it.
Update 8/6/2011
system had too much oil. I allowed the oil to blow out and slowly recharged the system. Working great.
did not replace orifice.
How to Replace, Recharge or Refill Your Air Conditioning System R134a-East Lansing Michigan
In this video http://www.professionalfleet.com in East Lansing Michigan will show you how to refill, recharge or repair your air conditioning system in your vehicle. Discuss what to look out for at other repair shops. How to charge with an a/c can and hose set up.
Professional Fleet Services Auto Repair
615 E Kalamazoo St
East Lansing Michigan
48912
Using AC Pressure Gauges To Fix Car AC Problems
Scotty Kilmer, mechanic for the last 43 years, shows how to use a set of
AC gauges to fix non working car air conditioning systems. Visit Scottykilmer.com for answers to all your car questions.
Charging your R134a AC System
This is a short video to show you how to simply and easily charge your R134a based AC system. In this example I'm using my 2002 Ford Explorer. You can read more on this at http://www.theymightberacing.com
Blowout! Understanding A/C Diagnostic Strategies & Repairs
In todays vehicles, comfort is one of the most important features and with the push of a button our A/C system provides as much comfort as we would get at home. AVI takes you back to the basics to help you understand the A/C system and components and how to diagnose and repair them. Check it out at http://www.auto-video.com/blowout-understanding-diagnostic-strategies-repairs-p-36.html
How To Auto AC System Cleaning - DiscountACparts.com
http://www.discountacparts.com/air_conditioning_compressor.htm?source=ytautoaccleaning07
How to clean your car's air conditioning a/c system. Important tutorial on auto ac cleaning. Car ac systems need to be cleaned thoroughly before changing the ac compressor. Here is an instructional video for home 'do it yourself' auto mechanic (s) and professional mechanic (s).
How To Find A Vacuum Leak - EricTheCarGuy
How To Find A Vacuum Leak - EricTheCarGuy
http://www.ericthecarguy.com/
I get questions about engine performance issues all the time and one of the things I tell people to check for is a vacuum leak. This video is pretty straight forward in it's approach to finding a vacuum leak. On thing I might mention is that not all vacuum leaks are at the engine, some HVAC systems run on vacuum and can cause a leak under the dash in some cases so don't forget to look there. I've even seen vacuum operated door locks, that would be fun to find. Just be sure to be careful spraying flammable stuff on a hot engine, you don't want to take one problem and make it a whole lot worse.
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ETCG
Due to factors beyond the control of EricTheCarGuy, it cannot guarantee against unauthorized modifications of this information, or improper use of this information. EricTheCarGuy assumes no liability for property damage or injury incurred as a result of any of the information contained in this video. EricTheCarGuy recommends safe practices when working with power tools, automotive lifts, lifting tools, jack stands, electrical equipment, blunt instruments, chemicals, lubricants, or any other tools or equipment seen or implied in this video. Due to factors beyond the control of EricTheCarGuy, no information contained in this video shall create any express or implied warranty or guarantee of any particular result. Any injury, damage or loss that may result from improper use of these tools, equipment, or the information contained in this video is the sole responsibility of the user and not EricTheCarGuy.