SOURCE: Adding AC to my 1990 Dodge D150
good evening and welcome to fixya
adding ac to your dodge is kind of complicated. are you going to be doing the job or are you contracting it out? there are a few ways to go about doing this: one is you can hunt down another d150 that came from the factory with a/c and use all the parts from it. the second is you can look at purchasing an aftermarket all in one ac unit, sometimes you must do a bit of modifications to install this unit. the third is the most expensive but all new, you can go to your local chrysler dealer and ask for the schematic of the ac system for your vehicle and tell them what you want to do and they will give you a parts list, this list will include a new radiator to accomadate the a/c condenser. the major parts you will need are the condenser, switch panel, compressor and all brackets to hook up the compressor, the ac box under the dash the has the evap coil in it, you will need a set of lines and accumulator, pressure switchs high and low, expansion block, freeze switch, and possibly you will have to change the pulley setup on the front of the engine to accomdate the new belt for the compressor. this is a good starting point of the items that are required. hope this helps good luck to you.
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SOURCE: 2004 Dodge Intrepid air conditioning. Recharged
vacuum down to 30 inches for an hour recharge let me know what kind of readings you have
SOURCE: how do I recharge the Air Conditioning system on
This should be done by a professional. However I will share the basics with you and you are free to attempt at you own risk. Let me start off by stating that if your A/C system isn't working is either due to a leak or a component failure. You should first determine the reason for the problem and repair it. Once this is done you should evacuate the A/C system using a refrigerant recovery system and insure the system holds a vacuum. If it holds a vacuum then you can proceed to install the required R134A refrigerant and PAG oil. Oil in the system is very important to insure a long life for the compressor. There are two lines off the compressor, on small line (high pressure side) and one large line (low pressure side). Each line has a fitting on it. Sometimes the LP side will be on the dryer ( looks like a aluminum can about 4" round). With a vacuum in the system you attach the new refrigerant to the Low pressure side (big hose). Do not open the can until you have started the vehicle and have the A/C running with the fan on full. Once you have the engine running you can start opening the valve on the can to add refrigerant. However be sure not to over charge the system. A label under the hood should specify the correct amount. IE 2.2Lbs R134A
Once you have inserted about a pound of refrigerant you should notice the A/C compressor clutch locking in and starting to cycle. Once you have reached a 3/4 charge the clutch will stay engaged until the desired temperature inside is reached or until the head pressure on the pump becomes to high of hot.
That about it in a nut shell. You should also use a digital thermometer in the vents inside to see what the exiting air temp is. A 20 degree air difference between ambient vehicle air and A/C air is a good number.
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