Hi all,

First post on this forum, but I've been lurking for a few months now, and, thanks to this forum, I've had great advice for dealing w/ snapped screws while putting in new shocks, rear main seal removal, and a bunch of other work that I've done on my XJ.

Quick question:

I've installed a new AC drier, compressor, and condenser as well as a new AC line (the one that connects from the condenser to the spot below the windshield, I'm not familiar with what it's called.)

I'm pulling a vacuum on my AC system, and it goes to around 23-25hg, and it's able to stay there when I turn off the vacuum. However, the videos that I've been watching regarding recharging ACs tell me that I should be able to pull a vacuum all the way to 30hg or somewhere around there.

Any thoughts on this?

Additional details:
- Rented vacuum pump from AutoZone, replaced pump oil, pump has sufficient oil. Just in case the vacuum gauge was broken, checked on two different sets of gauges.

 

Sounds like a very slight leak... hopefully at an o-ring and not a pinhole in your evaporator.

Also, double check the fittings on your gauges... I didn't have mine tight enough and that's exactly what happened... pulled and held just below the full vacuum for an hour or two before I could see the vacuum level slipping on the gauges.

 

What size vacuum pump you using or is it one of those venturia style one that runs of air compressor... could be just too weak to pull down lower.

 

Is it able to hold the 23-25hg? Rental gear tends be treated like......well rental gear. The guage might be off a few units.