 |
   |
|
| |
|
|
| Subject |
Re: here are your answers (LONG) |
|
| |
|
|
| Posted by |
TheCamel on May 18, 2001 at 6:03 PM |
|
| |
This message has been viewed 116 times. |
|
| |
|
|
| In Reply To |
Air conditioner change posted by onlinediamond on May 18, 2001 at 10:04 AM |
|
| |
|
|
| Message |
I do A/C swaps for the Air Force vehicles, depending who you talk to on this you will get 1000 different opinions. Easiest way if nothing is broken is to leave the system R-12. If you require a charge, then definately go with the conversion as it is cheaper in the long run. R134a kits are available on E-bay fairly cheap and are a broad range of vehicles. Make sure you get the kit for Imports. The kit will have a bunch of O-rings, and a set of fittings. The fittings are designed to destroy the old R-12 fitting threads once installed, so once you do the swap, you have to stay with R134a. As far as do it yourself, I wouldn't reccemend it as far as the charging and oil changing. We change the reciever/dryer when we do the conversion just to make the moisture content low in the new system. You will also ussually get a PAG or Esther 100 oil with the kit, or get a reccemendation for one of these oils. DO NOT USE R-12 oil in a R134a system. Residual oil in the system is fine, but a complete oil drain from the R-12 is next to impossible. Originally it was said that the compressor had to be changed and all of the hoses had to be changed as well. This is not true. It has been found that the R134a oil and R-12 residue form a chemical reaction that cause the seals to expand, and the hoses to have a barrier coating on the inside of them after the conversion. R134a has higher pressures than R-12 so you will need a different set of gauges, different fittings, vacuum pump, and at least 3 cans of R134a. On a conversion to R134a you use the R-12 charge and use 80% of that for the R134a charge 1.0 R-12 = .80 lbs R134a. If you have to change any components in the swap use the O-rings in the kit, ussually green, as these are designed to work with the new oil, you do not have to change every o-ring in the system. It is illegal to release R-12 into the atmosphere, and if you are caught it is a really nasty fine, and the environazi's have no mercy for those that are caught. Buy the kit from E-bay, and buy a new receiver/dryer from Nissan. take them to the local A/C shop and have it installed. That way if there is a leak, or there is a system problem, they have the tools to fix it. Let them pay for a A/C line that they destroyed removing the receiver dryer, rather than it come out of your pocket. TC
|
|
| |
|
|
| Follow Ups |
|
|
| |
|
|
Post a
Followup |
You cannot reply to this message because you are not logged in.
|
|
| |
|
|
| |
|
|
|
