Here is my torque setup. The gauge is after the torque multiplier so it's getting accurate torque applied. The Jack stand makes it easier to keep the rig straight on with the nut so it's accurate and easier to apply correct torque. Without the multiplier I have to put most of my body weight into the long 3/4" drive torque wrench (that isn't working well as a "torque" wrench so it's more of a breaker bar now).
I have a 3/4" air impact that I use to take the lugs off. But never use it to torque them tight. I use a 1/2" nimbler impact to snug the nuts fast.
So, cleaned up the AC fitting, got the fitting to turn again. Put a few drops of PAG oil into the compressor to ensure it wasn't dried up. Rotated the compressor by hand. Put the hose back on. Put the gauges on and the vacuum. Low pressure is behind the passenger headlight and up top. High pressure port is behind the drier just right (in the pic) of the gauges. Applied vac to it for a few hours. Turned vac off and let it sit to detect any leaks. So far none. No loss of vacuum noted. Off to WallieMart to buy some Freon. My specs say 3.5lbs. I'll buy a few extra cans and monitor the gauge pressure / temps. And yes, I am sure I should replace at least the dryer...
So, a night later and still no loss of vacuum. So, will charge the system up today and fingers crossed the relatively new compressor is OK. Turned the pump on to get the last bit of moisture out of the system.
No leaks, so pumped it down a bit more and put 3 cans of freon in. Clutch engaged...and then the low side gauge went negative...so that indicates a blockage, either at the dryer or expansion valve...so crap got into the line.
Ordered new compressor, dryer, expansion valve.
Always sumthin.
__________________