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Re: AC system fix confusion Posted by JerseySaab [Email]  (#666) [Profile/Gallery]
(more from JerseySaab) on Wed, 26 Jun 2013 07:36:53
In Reply to: Re: AC system fix confusion, steve, Wed, 26 Jun 2013 06:12:16 Members do not see ads below this line. - Help Keep This Site Online - Signup |
Bear in mind that I am not a pro at this, just a shade-tree mechanic!
I have not covered the fitting openings when using Nylog, I just coat the o-rings and the seating surfaces with it. The fitting bolts are not exposed to refrigerant so no need to use Nylog on those. (Maybe put a little anti-seize, but be very careful not to contaminate the system with it.) The manufacturer of Nylog recommends putting it on the valve stems of the service valves but I have not done that. Couldn't hurt, though.
I don't know of any downside of using oil with dye in it, and the dye can certainly be of assistance when diagnosing leaks.
There are rules of thumb for how much oil to add when replacing specific components. The better way is to dump out and measure how much oil is actually there and put the same amount back in. You don't want too much oil in the system as it will negatively impact performance, and a really large amount will act like a moving blockage.
New compressors usually come with several ounces of oil inside. You'll want to dump this out and install fresh oil.
You can measure the oil in any convenient manner, just make sure it stays clean and try to minimize its exposure to atmospheric moisture. I add the oil last, just before buttoning up the fittings and pulling vacuum, to minimize moisture absorption. I usually use a large syringe marked in fluid ounces to measure the oil. (Easy enough to convert metric specs if needed.)
If replacing all the oil in the system, normal practice is not to put it all in one place or all in the compressor. Put 1/3 in the compressor, and 1/3 each in a couple of other components to spread the oil charge through the system.
If the compressor has been replaced, turn it by hand several times to distribute the oil and lube internal parts.
, Tue, 25 Jun 2013 09:14:40, Tue, 25 Jun 2013 10:05:36, Wed, 26 Jun 2013 07:36:53 <-- Viewing This Message, Wed, 26 Jun 2013 09:40:02, Wed, 26 Jun 2013 14:17:21
, Tue, 25 Jun 2013 19:06:29, Wed, 26 Jun 2013 04:51:45
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