Saturday, March 25, 2023

AC Leak After Front End Collision

Main AC Leak After Front End Collision

Viewing 14 posts - 1 through 14 (of 14 total)
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  • #51268


    Very small leak indeed.

    Gaston Mechanic

    Great video. Those small , hard to find leaks can sometimes be present only during heat/thermal cycling.
    Sometimes, running the engine, with hood closed will help with detection.

    We have a cylinder of Nitrogen gas and the CPS Nitrogen leak detection kit that we connect and pressurize the system to 100 psi. Shutting off the manifold gauges, you can see the amount/rate of leak in the system. At the same time, we spray all joints, fitting, crimp hoses, etc using Safety Seal brand Leak Seeker solution (used for tire leak detection) and watch for the bubbles.
    Keep in mind that in some cases, leak is from AC compressor front seal. To help locate those, we charge the AC system, run it a while. Then we put a womans shower cap over the front end of the compressor and let it sit for 30 minutes. Afterward, we use our electronic leak detector and see if refrigerant is trapped into the shower cap.

    Depending on the leak location, UV dye might no always be effective depending on the location of the leak. Newer AC systems have such a small oil capacity that the UV dye might not be carried to the source of the leak effectively.

    We do a lot of AC work in our shop. Have a contract to maintain a fleet of limos and a bus service that keeps us busy keeping the AC cold .

    Mansour Alblooshi

    Thanks for sharing sir. If the refrigerant has leaked, i would pressurize the system with an external compressor up to 250-300 psi then spray the soap on the suspected points. Even very small leaks will show up.

    Thomas EXOVCDS

    Just ordered the light, thanks!

    Pauly D

    If the leak was large enough to make visible soap bubbles, your electronic leak detector would be going crazy. You got a small leak alert from the leak detector but your best indication was the presence of UV dye at the suspected leak site. The trouble with dye is; it spreads out over time, sometimes making it difficult to pinpoint a small leak. Your best bet is to clean off the UV dye and keep checking the suspected leak site with your UV light. It will take some time (not minutes, maybe hours) but you will eventually see the dye begin to appear.


    Let us know what was found. Maybe intermittent?


    You tried everything to find that leak. I had a car that has the same issue. The leak was so small it was never found. I just had to fill it up once a year.

    Jack Daniels

    Could be leaking at the compressor or somewhere else. Top line looks crimped or damaged too. I believe you are required to wear the yellow glasses when using uv lights. Don’t eat it or let PAG oil and UV dye drip in your mouth. Can’t be good for you. Might taste like dead rotten fish with heavy metals mixed in 😳

    joe bush

    dye dont lie only way to go


    Sounds like the car is on life support with the beeping lol.

    Welding Junkie

    Would the leak be more prominent with the system running ?

    Welding Junkie

    1st Boom!! LOL ok ok second bodgit 😂

    bodgit and leggit garage

    1st BOOM

Viewing 14 posts - 1 through 14 (of 14 total)
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