DOES A/C STOP LEAK REALLY WORK???

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does a/c stop leak work? we are about to test a/c stop leak in the car will ac stop leak fix the air conditioner evaporator core? is ac stop leak bad?

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0:00 intro
0:05 materials
0:26 First temperature reading
0:55 Determining how much Freon you need
1:42 hooking up gauge
1:45 jump starting compressor
2:28 putting in stop leak
2:40 First test
3:01 second test
3:18 third test

[voiceofreason]

There are generally two types of AC stop leaks. One is essentially just PAG oil and the other type reacts to moisture, theoretically at the pin hole leak. The PAG oil types will only work for minor rubber o-ring seal leaks. The latter will work for leaks in metal. If you use the latter type, you will need to vacuum the system (to boil out moisture), otherwise you will clog your AC dryer, or worse, accum/conden/orifice. Adding more and more stop leak with PAG will cause harm if done too many times.

You might want to view the manuf's method for adding R134a. I do not know of a case where you need to turn on your condenser. Adding on the low side will bring up the pressure to satisfy the pressure switch (add vapor/not liquid). Your manuf service manual can verify if this is the case for your vehicle. I believe in some vehicles it would be best not to jumper and run the system dry.

Also add with gauges or by weight. Weight method is the best if you can reclaim the R134A or if the system is empty. Gauge method is good if you are a little low.

You can rent (free) a gauge set and a vacuum pump at your local parts store and do the job correctly. There are a ton of videos showing how to use them correctly with no guessing.

It will take time to tell if a stop leak "hail mary" worked. You cannot tell if it worked by running over short period of time. No stop leak will work for a system that leaks out over a period of a couple of hours. It is best used for a system that has a much slower leak.

The best thing to do is to add some dye and verify where the leak is. If it is in the pump or condenser it is an easy enough job to replace o-rings or even the condenser/pump if aftermarket parts are used. If it is in the accum then it is not an easy fix. You cannot usually view a accum leak because it is buried in the dash, but you can see the dye in the condensation drips on the ground.

[roadstar]

That is a very serious leak
..most cars I have had leaks lasted 6 months or more...I would add a can of stop leak to a slow leak maybe, but for this leak I would have added die to locate all leaks and replace parts and seals than recharge..great demo on product. Thanks

[agilliam]

For anybody watching this video, please do not do what this guy did. I am a certified HVAC technician, and you do not enable the clutch while it’s empty and dry. The clutch will automatically engage once refrigerant is detected and pressure is built up inside the system. By shorting out the switch contacts, your prematurely, engaging the clutch and running it dry without refrigerant. This is equivalent to running your engine without oil. Do not follow this clowns mistakes. I am certified 608 universal and 609 MVAC. A leak this big is also very foolish to try and deal with stop leak.

[michaelminnick]

Depends where the leak is, if it's o rings or gaskets or maybe rubber hoses, that stop leak MAY work but if it's a metal line or condenser, evaporator leak, you need a stop leak that will stop a metal leak, though those types of stop leak will eventually clog the system but .!

[schemeteam]

I was super surprised with the supertech AC stop leak. It worked and I had a little more than usual leak. For the price, it's a steal and works.

[rickvia]

I bought a '95 C1500 2 weeks ago. I got the few things didn't work going, except the A/C. I added a can of 134a and the compressor started (great news!) and cycled off very quickly. I added 2 more cans and got the compressor to cycle better, but 20 minutes later all had leaked out. The dye comes next. Thanks for the vid BTW.

[christophertracy]

A leak that is big enough to drain the system in 15 minutes can not be fixed with sealer. Even I know that.

[bbbmazfamilyovereverything]

This stuff absolutely worked for me I put it in and put two cans in a PT cruiser and fill the rest with freon it has been over 3 years and it is still ice cold ac and no issues with pump

[Negativvv]

According to a garage my car had an old leaky condenser and possibly o-ring leaks around the compressor. This is after putting dye into the system, they couldn't give me any definitive but definitely wanted a lot of money from me to fix the problem for good. A can of stop leak and some more refrigerant did the job just fine and it's been over a year.

[ryans]

I can confirm it works on a small leak not big leaks. It fixed my 18 year old car that had a small leak

[kittyfanatic]

Stop leak works great for SMALL leaks like old hoses and cracks in the condenser soldering but large leaks as stated on the container requires part replacement. But the stuff works is the point here. It’s not snake oil but not a magic wand either lol.

[followyourbliss]

personal experience - stop leak works until it doesn't - worked on one of my cars as a long term temporary fix for 3 years before the leak was so bad it wouldn't hold at all

[zyxzyx]

Toyota's seem to have the most durable ac systems. I've seen 25 year old Toyota's in Florida with all original systems and one recharge in 25 years 😎

[homerfj]

I like this guy's video because he tells it as it is.
Today, after 2 years of putting up with no AC, I used proper gauges to fill the system with pure gas, no sealer.
A garage, 2 years ago, told me a new compressor was needed (leaks between moving seals).
So I'll see what happens. It might leak out in 15 minutes. If so, I probably need a new compressor and other seals.
However, if it lasts longer I know it's a slow leak, like a slow puncture that can be topped up.
BTW can "stopleak" totally ruin the car's AC system?.

[bigguy]

You did not have to use the staple just add a little bit of freon and the compressor will kick in. Then you can do procedures with the rest

[km]

i had a slow leak in my truck and put some oreily blue devil stop leak and it fixed it for 3 summers. Before i had to recharged every summer.

[Coxfame]

I have a leak at the aluminum tubing going to the condencer. My mechanic said to just buy another condenser. I am looking around $600 for parts and labor. 😞. I used a rubber hose clamp, it worked temporarily. The heat and cold combined temperature made wearout fast. Does anybody have a good home remery? Someone originally tried to repair it with some hard repair kit but it felt over time.

[gradefabrication]

It's slowed it down for me but it doesn't "seal" things up

[Glenn_]

So you can not add Freon or stop leak unless you pull a vacuum to remove the moisture. However, you can not pull a vacuum because you have a leak. How do you do this? So, I am at the same position you were an AC completely empty with a leak. Would love to try stop leak but I know I can not pull a vacuum to remove the moisture. Thoughts?

[blackjacket]

I just have a tiny pinhole in my condenser and it takes like two weeks for it to leak enough to be warm so I’m thinking this should work for me…