I think your plan is a good one. Try another manifold gauge set, pull a vacuum, and see whether it holds. If not, I would suspect the front compressor shaft seal since you've double-checked just about everything else. Place a shower cap around the front of the compressor, charge the system with a f...

Finally got around to finish building up the A/C system on this RX7, but I'm finding after evacuating the system, it won't hold a vacuum over time. So it's likely something is leaking. Quick rehash of the restoration project and summary of where I'm at now: - When I got the car, the only A/C equipme...

Barrier hose will be a snug fit, but it should be anyway. A little lubrication is a good plan for sliding them on. If you can't find a loose ferrule with the correct dimensions, you can use clamps. We have covered this before: https://www.autoacforum.com/messageview.cfm?catid=2&threadid=13152 h...

I don't recall if your RX7 has a thermostatic sensing bulb in the evaporator to control icing. If it does, then you can set the low pressure switch down around 20 to 25 psi, because the evaporator control will prevent icing. Thanks, it does have a normally closed thermal switch mounted on the evapo...

Yes. you should add a high pressure cutout to the clutch circuit. Blowing the relief valve is something to avoid, and the switch does that. Since you are plumbing fresh anyway, it is not a big job. Supercool has always been good product Here is a PAG test I did years ago... https://www.autoacforum....

Wow, I'm surprised my lube selection comment would result in that much discussion - reminds me of what ensues on the Mazda rotary forums when a newbie asks if they should use a synthetic or conventional motor oil in their rotary :lol: Anyway, the oil that I used was purchased at a local Advance auto...

If you are putting in a huge intercooler, you will need to be sure that the condenser airflow is not compromised. It's a pretty big IC, but it's mounted in a stock like location (i.e., behind the radiator & condenser, which both lean forward at about 40*) So the radiator & condenser get the...

What concerns me the most is the oil you used. The slightly smaller TV12 compressors used in R-134A applications came with a ND oil 9 factory fill, that is, double end capped PAG 100, double the viscosity at 212F than Ester 100 (the viscosity you likely used, since that's the most common for auto a...

My '93 RX7 resto-mod project has finally reached the point where I can focus my attention on restoring the A/C system. When I got it almost a year ago it had no A/C components on the engine bay side of the firewall. Fortunately all the HVAC electrical controls, HVAC wiring and interior blower/air ha...

Proper cooling in general. 14 x 24 PF condenser is needed. Exp valve reads temp at the probe. R12 or R134a. Thanks! Being a bit of an AC noob, with regards to the condenser, should I be selecting based on a minimum surface area? So at the recommended 14 x 24 size = 336 square inches, would a differ...