I found a leak in the A/C system on my truck. You can see the location of the leak in the picture. Is there an o-ring in that connection or do I need a whole new line/hose? I'm glad the UV dye was added it made the search very easy!

 

Is that a service port sticking up into the top of the pic? If so, there is a valve there and it maybe loose. Which is common. There should be a cap covering the service port. It has right hand threads. Meaning righty tighty and lefty loosey. You will need to buy a tool to tighten the valve. It looks exactly like a valve on a tire stem. But what ever you do, don't turn it counter-clockwise. That will loosen the valve possibly causing it to come out under pressure. And that would be dangerous.

If you are talking about the hose where it is crimped onto the metal tube. Then no, that is not serviceable and the line will need to be replaced. But, is your leak really bad? Most systems have very small leaks that cause no problems. B.

 

Thank you for your reply. I checked the service port and there isn't a leak. The tube that branches off to the port with the black cap doesn't "glow". The part where the hose is crimped is ok, its where the crimped part meets the tubing, that's where its leaking from. It looks like it may be two parts that fit together.

 

Yes, that part of the hose is not serviceable. Sorry. So if the leak is substantial the system will need to be evacuated, the hose and corresponding o-rings changed, then vacced for 30 minutes, then a 30 minute test to see if it holds vacuum, then re-charged.

Do you access to a sniffer to test the leak? If not, try cleaning that area really well then run the system for a day or so and check again with your UV light to see the progress of the leak. It maybe just an ounce or two a year type of leak and if so it is nothing to worry about. Have you been having to add R134 to the system to keep it running? If so, then a hose change will be in order.

B.

 

I think its a pretty good leak, I just had the intercooler blue hose off 2 months ago and cleaned it before i put it back on. I went under the truck a few minutes ago with the black light and the bottom of that hose is glowing green and its running all the way down to the bottom of the radiator. I am lucky to have a friend with the machine to evacuate, vacuum and recharge it. Will be heading to his house with his favorite beverage. lol. Looks like I will order a new hose. I always purchase OEM however I saw another brand called Four Seasons. Have you heard of them? Thanks again for your help!!

 

Four Seasons is great stuff, I've never had an issue with that product line. Good luck. B.

 

Good to know! Thank you! I ordered a new hose from Four Seasons. I cleaned the fitting up really good and applied some JB Weld to it until it gets fixed. Figured at least it will slow the leak. lol