A few weeks ago I went to evacuate my A/C system to recharge it (97 L400 with front and rear heat & A/C). I took it to the shop and it was vacuumed for about 15 mins - then sat to see if it would hold. It would not hold vacuum and the needle on the gauge began to creep almost immediately. I had a look at the external lines and hoses. The only place I could see a slight bit of oil was at the connections to the rear evaporator. I removed the evaporator, took it in to get tested (it passed) and I replaced the O-rings at these two connection points.
I took it back last week and it was vacuumed again. It held vacuum a bit better than the time before but the needle on the gauge began to creep again indicating a leak.
I have looked at what I think are all the A/C connections and can't see any oil on them.
I was thinking of replacing all of the o-rings anyway just to ensure that's not the issue.
The A/C guy said I could leave it for the day and they would pressurize it with nitrogen in attempt to find the leak. That sounds costly.
Anyone have any ideas?
A/C Leak
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izack98
- Posts: 138
- Joined: Tue Apr 30, 2013 4:15 pm
- Member's Photo Album: http://www.delica.ca/Photos/
- Vehicle: 1997 L400 Super Exceed PE8W
- Location: Delta B.C.
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islander20
- Posts: 105
- Joined: Wed Dec 10, 2014 8:00 pm
- Member's Photo Album: http://www.delica.ca/Photos/
- Vehicle: 1994 L400 LWB
- Location: Port McNeill
Re: A/C Leak
Pressurize with nitrogen, leak should be obvious. The pressure relief valves are often stuck open, may be one of them.