I'm going to convert my A/C system back to original, and I've got a few questions.

1) What kind of oil should I use and how much? My father, an HVAC tech of 40 years (not automobile), recommended I pick up some Suniso 3G refrigerant oil at a supply shop. Will this work and adequately lube the R4 compressor?

2) Do I need to use Nylog Red?

3) I plan on flushing the condenser and evaporator with acetone (cheap at Home Depot) and the rubber parts with solvent-based flush from one of the box stores. Followed with nitrogen to blow it out. Good idea?

4) I'm hoping to leak test with nitrogen by pressurizing to 100 PSI, but i don't have a sniffer or any refrigerant that is legal to vent for leak testing. I was thinking I would leave it overnight and see what the pressure was in the morning. I have one of those Robinair digital manifolds. Suggestions?

Thanks!

__________________
cbjukraine
'84 300D