I am going to replace my ac compressor this weekend after pulley bearing failure. I got a new Denso compressor and I believe it has oil already in it. I just had my AC refrigerant evacuated. Do I simply bolt the new one up with the current oil in it and have them put r134 in? Also I am replacing the condenser and dryer. Do I need to put any oil in them or am I covered with the new oil in the compressor?
AC Compressor Oil Question
- Thread starter rjaudi
- Start date
Register to hide this ad
If its not dripping oil out of the holes then I don't think its oiled.
I'm not sure if you have ever done any A/C work, but the correct way to do it is to completely install the entire system (compressor obviously included) and then pull a vacuum on the system to boil off any condensation that got into the system. Once that's done, you add oil along with the refrigerant charge at the correct amounts specified for the system. It's really pretty easy, but if you're doing it yourself, you should have a decent set of gauges.
The really important thing is to apply vacuum to to any A/C system that has been "open" and exposed to outside air. You absolutely have to get rid of the moisture in the system....
The really important thing is to apply vacuum to to any A/C system that has been "open" and exposed to outside air. You absolutely have to get rid of the moisture in the system....
That is what I thought. I already had a shop evacuate the system. I was then going to install the components and take it back to be vacuumed and refilled. All the instruction books with the compressor said to add oil but I thought it would be removed with the vacuum. So I put no oil in and then it is done by the shop?
Reina
New member
:iagree: This is not a do it your self type project unless you have the correct equipments which most likely not. Since is not likely that someone just happens to have an A/C machine in their garage. So unless you have the know how and have the correct equipment, it is best to take it to a shop.
You have to understand that once the system is open to the atmosphere, it must be evacuated again. The reason is because air contains moisture and that moisture will get into an open system. You can do it yourself if you have a decent vacuum pump. The whole idea is that applying a steady vacuum will boil off the moisture and remove it. Then you can add the proper charge of refrigerant and oil. To do this, you can even get away with buying a cheap refill kit that comes with a gauge on it. Or you can use a scale to weigh the exact amount you're putting into the system. This is probably the best method when the system is completely evacuated because you'll know exactly how much you should put in.
You really don't need to pay a shop to do this job....it's easy if you just follow some simple directions.
