Just fillled my A/C 2 days ago w r12. It was working great, but last night the compressor started sqealling, its a short sqeaul that increases with rpm. Anyway I've been reading up on this and found out that this compressor has a seperate resivor for oil. Is there any special way to fill it? We simply added 10oz just into the lines but not into the compressor itself. It hasn't siezed but I'm afraid it will if try to run it anymore. also the very front of the compressor gets very hot, hotter than any other part. The area where the pulley and clutch are, are what get hot, but it's not the belt. I'm thinking maybe a bearing in the front of the compressor not getting oil. Anyway this is on a 78 blazer, 305. I hope this can be fixed, Thanks for any help.