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AC leak/fix. Anything I'm missing? #5418233 05/01/20 12:37 PM
Joined: Jun 2014
Posts: 798
funflyer Offline OP
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A few years ago my 01 Taco's A/C started to put out warmer air, and from the bubbles in the sight glass I new there was a leak. At that time, I charged it back up (134a w/dye) and couldn't see any leaks using a UV flashlight. I checked several times over a month and never could find a leak so I figured it must be leaking at the evap core where I couldn't get to with the light. Seemed to hold a charge and work well up until last month. Now I see the dye showing up on the low side schrader valve and also around the compressor clutch, front and back.

I figure I better just shotgun the entire system at this time so I ordered the following parts, along with 134a and PAG46 oil.

evap core
expansion valve
dryer
o-ring seal kit
master seal kit for Denso compressor
schrader valves

I've got the evac and recharge covered, have access to a vacuum pump and manifold gauge set. Anything else I'm overlooking here? I couldn't find anything telling me about any special tools needed for any of the lines or the comp clutch so I'm assuming none are needed?. Thanks.

denso comp.jpgleak1.jpgleak2.jpgleak3.jpg

2016 Prius 1.8L
2001 Tacoma 2.4L
1966 GTO 6.5L
2015 Cub Cadet
Honda CT70 (X6)
Re: AC leak/fix. Anything I'm missing? [Re: funflyer] #5418243 05/01/20 12:57 PM
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mattd Offline
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Just be aware sometimes oxidation can show up green in black light. Honesty I would just replace the valve core and see how long it holds a charge.


2007 Ford F-350 4x4 6.0 PSD

ASE Master, L1, L2
Re: AC leak/fix. Anything I'm missing? [Re: funflyer] #5418267 05/01/20 01:23 PM
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Chris142 Online Content
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I replace tons of High side hoses on Toyota cars and trucks due to leaks. Also keep in mind that you can't fill or check an R134a system by sight glass. It will always have bubbles in it unless it's overfilled.


02 Wrangler Napa high milage 10w40
87 F250 Valvoline 15w40
07 fjcruiser Car lube plus 10w30
Z400 castrol T 10w40
Can am Maveric edge 5w40
57 case tractor Chevron sae30
Re: AC leak/fix. Anything I'm missing? [Re: funflyer] #5418325 05/01/20 02:20 PM
Joined: Sep 2007
Posts: 1,483
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JMJNet Offline
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This is optional but it should help you maximized the seal:
https://www.amazon.com/gp/product/B008HOSQQQ

You can read how to use it.
Somebody suggested it to me when I installed a new compressor in a 04 Sienna.

Last edited by JMJNet; 05/01/20 02:22 PM.

  • 2017 Toyota Sienna
  • 1995 GMC Suburban 6.5L Turbo Diesel


Re: AC leak/fix. Anything I'm missing? [Re: funflyer] #5418338 05/01/20 02:32 PM
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funflyer Offline OP
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Thanks guys. Chris, is there a typical area that leaks on the high pressure hoses? Do they crack or leak at the fittings? I did use a gauge set when I charged it last time but don't recall how much refrigerant it took, but once up to proper charge the bubbles cleared up. Matt, I didn't know that about oxidation, and since I don't see any indication of oil around the clutch that's what it could very well be. Since the truck is almost 20 years old I'm going through the entire system so it won't crap out on me again for many years, hopefully.

Last edited by funflyer; 05/01/20 02:41 PM.

2016 Prius 1.8L
2001 Tacoma 2.4L
1966 GTO 6.5L
2015 Cub Cadet
Honda CT70 (X6)
Re: AC leak/fix. Anything I'm missing? [Re: funflyer] #5418365 05/01/20 02:55 PM
Joined: Sep 2007
Posts: 1,483
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JMJNet Offline
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There are specific Car Air Conditioner forum where you can find the quantity required for your Tacoma.
You can Google it.

The hotter the temperature, the better your ability to get the correct amount of refrigerant.


  • 2017 Toyota Sienna
  • 1995 GMC Suburban 6.5L Turbo Diesel


Re: AC leak/fix. Anything I'm missing? [Re: funflyer] #5418392 05/01/20 03:14 PM
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Donald Offline
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Are you planning on pulling a vacuum and see how long it holds?


2015 Ford F-250 w/Powerstroke
2016 Subaru Crosstrek CVT (wife's)
Re: AC leak/fix. Anything I'm missing? [Re: Donald] #5418630 05/01/20 06:39 PM
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funflyer Offline OP
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Originally Posted by Donald
Are you planning on pulling a vacuum and see how long it holds?


Yes, probably a good idea since I'll have everything in the system apart.


2016 Prius 1.8L
2001 Tacoma 2.4L
1966 GTO 6.5L
2015 Cub Cadet
Honda CT70 (X6)
Re: AC leak/fix. Anything I'm missing? [Re: funflyer] #5418763 05/01/20 09:16 PM
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mpack88 Offline
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Are you not changing hoses?

Re: AC leak/fix. Anything I'm missing? [Re: mattd] #5418854 05/02/20 12:37 AM
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WyrTwister Offline
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Originally Posted by mattd
Just be aware sometimes oxidation can show up green in black light. Honesty I would just replace the valve core and see how long it holds a charge.


I agree . I consider replacing the Shrader valve as preventive maintenance on any / all A/C & HVAC equipment . As a first step when loosing refrigerant .

That alone may reduce the refrigerant loss to a manageable level . And topping off refrigerant is not difficult .

Best of luck ! :-)


Wyr
God bless
Re: AC leak/fix. Anything I'm missing? [Re: mpack88] #5419493 05/02/20 10:22 PM
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funflyer Offline OP
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Originally Posted by mpack88
Are you not changing hoses?



Probably will. I didn't find any leaks but I'm thinking it's probably a good idea to change them anyway.


2016 Prius 1.8L
2001 Tacoma 2.4L
1966 GTO 6.5L
2015 Cub Cadet
Honda CT70 (X6)
Re: AC leak/fix. Anything I'm missing? [Re: funflyer] #5441986 05/29/20 05:23 PM
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funflyer Offline OP
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Finally had the time to install AC parts and reseal everything yesterday, then recharged the system today. No leaks and AC is back to normal. Glad I decided to reseal the compressor because when I took off the clutch and checked it with the UV light it was glowing green.

comp.jpg

2016 Prius 1.8L
2001 Tacoma 2.4L
1966 GTO 6.5L
2015 Cub Cadet
Honda CT70 (X6)
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