Hi All!

So here is my situation. My Car: 1992 Honda Accord LX 4Dr. My A/C stopped blowing cold air a few weeks back. It was an old R12 system. I've had to recharge it about 3 times in the past 2 years. Finally, the compressor was not working properly anymore. Kept blowing the clutch fuse. Long story short, I've replaced the compressor, new expansion valve, new receiver/dryer, new o-rings throughout and two new compressor hoses. System was flushed properly.

Now I've run a vacuum on the system. At first it did not hold vacuum at all. I rechecked the fittings and found some of the o-rings I had used were not the correct size as the originals. Fixed that issue with the proper sized o-rings. All fittings are tight. I ran the vacuum on the system again for a little over an hour. Closed the high and low ***** on the gauges. The low side held the vacuum at about 29hg. The high side vacuum however did not hold. It probably took it about 20-30 minutes for the gauge to read zero on the high side. The low side, however, is keeping the vacuum. Is it okay for the high side to be loosing the vacuum? Or is this normal for that part of the system? I've read alot of message boards and all have said pull a vacuum of at least 29hg or so...but doesn't mention anything about the high side. I realize the vacuum numbers are only on the low side gauge. I figure both sides should hold vacuum but am a bit baffled by this. Any A/C gurus seen this kind of issue before? Let me know...I want to get my car nice and cool again in this sweltering Texas heat.