My a/c compressor grenaded this weekend (was leaking before anyway) so now I need to replace. To save costs, I was gonna install a rebuilt compressor & new accumulator/drier and then drive the truck to a local shop to have the system professionally flushed and refilled. My question is: What do I need to do to the new compressor in terms of oil just to be able to drive it to the shop? Is there a fill plug or something where I should just add a few ounces before starting the engine? Thanks in advance for your help, all!!! P.S. Should I install a new orifice tube also? Where the heck is this part even located? In the box mounted to the firewall? -------------------------------------------------------- I decided to update this post so that it can perhaps be of some use to those doing a search later on down the road... Plus I'm sure everyone is on the edge of their seats wanting to know that happened! Anyway, I bought a rebuilt compressor and new accumulator and installed them in my driveway in less than an hour for both, using new o-rings on everything. I then drove the truck to a shop about 50 yards from my house - Chatham Collision Repair. Although they primarily handle bodywork on very upscale cars like Porsche, Ferrari, Jaguar, etc... the owner agreed to flush & fill my A/C for a very reasonable cost as a HUGE favor. If you live in Northern NJ (Morris County) and ever need work done at an absolutely first class shop, I highly recommend Chatham Collision Repair (973) 635-9428. Okay, so not necessarily in order, they vacuumed the system for a good 2-3 hours, checked for leaks with dye (there were none), flushed everything out & installed a new orifice valve which I provided, then filled 'er up with 134a & oil, leak tested again with an electronic device (again, none) and I drove away one happy and cool (literally!) customer. Total cost including all parts, labor, everything, was $257.00 Would have been $10 less but I was too lazy to return the compressor core. Have put a few hundred miles on since and everything is still a-okay. Taking a 1,300 mile trip w/trailer shortly though, which'll be the real test.