2010 Buick LaCrosse that isn’t cooling well. Vacuumed and recharged to the amount listed under the hood. At 1500 rpms. High side was 200 and low was 55. At idle the low side would sometime be as high as 70. Has something gone bad in the compressor? Lowest vent temp was 65.

The label on the compressor said 500 ml of oil. By the time I had the clutch changed this time, I had lost most of the oil. Level was below the sight glass. When it was mounted I topped up the oil level to half way up the sight glass using an 8 oz bottle of oil and there was oil left in the bottle w...

It's up and running again. Mounted the compressor and got the oil level half way up the sight glass. Flushed the evaporator. It had a little oil in it, nothing crazy. Put on a new drier with no oil added to it and then vacuumed and recharged with 5 lbs 4 oz. on high idle high side was 235 low was 15...

Thanks for the detailed instructions. I won’t be able to make it he refrigerant flush setup his time, but I will save your instructions and be on the lookout for an extra tank to be used as the trash tank. If I can gather up the correct fittings, I’m going to try the brake clean and side can tap met...

I’m not sure what would be required for a refrigerant flush of the evaporator. Can it not be flushed with laquer thinner?

Just removed the compressor. It had a placard on it that said to use 500 ml of oil. Think that is half a quart. I’m stopping at half a sight glass.

I may also flush the evaporator and condenser a second time. I’m concerned they may be oil logged now.

Last time I drained the oil down to where the sight glass was about 3/4 full. My thinking was some oil would settle in the new drier. No oil was added to the new drier before it was installed. After it ran a while, the sight glass was full again. My plan is to recover the charge so I can change the ...

I found some info on stationary hvac with expansion valves and the problems caused by too much oil. I’m wondering now it that isn’t the reason for the unsatisfactory cooling we’re getting in our engine? I think it still has too much oil. Also, the compressor clutch self destructed again last week. N...

I’m not positive, but I think that truck would have used an R-4 compressor.

I looked up both expansion block part numbers on the internet. Both say for R-12 and R-134a. I adjusted the valve today and no change. The low side was 11 psi and vent temp 50. The outlet pipe of the evaporator was frosting up.