Hello and welcome to justanswer. My name is XXXXX XXXXX I can assist you with this.
What is supposed to be wrong with your dryer?
Oh, ok. Then this should be all you would have to replace. The inner fender liner needs to be dropped down in the the front to access a 10 mm bolt in the dryer bracket. Once this bolt is removed and the 2 lines on top of the dryer, the dryer pulls straight up. I have illustrations below to assist you.
Yes, there are 2 o rings on top of the dryer where the lines attach. These should be replaced.
If your existing compressor is working ok, I would not replace it. The CRV compressors are very good and most last well over 200k.
No, you won't need to add any oil to the system when replacing the dryer.