A/C high pressure Bolt broke

Tiny
DG7717
  • MEMBER
  • 2006 MAZDA 6
  • 3.0L
  • V6
  • AUTOMATIC
  • 187,000 MILES
The A/C high pressure bolt broke on my car but everything else is fine with the cooling system and lines (no leaks). Will I need to flush the system just to install a new bolt?
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Tuesday, September 7th, 2021 AT 1:36 PM

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Tiny
KASEKENNY
  • EXPERT
Just to confirm what broke, the high pressure line that has the block joint where then bolt holds the two together?

Please see the pictures below to confirm this is what we are dealing with.

If that is the case, then you are going to have to replace the line or if you can extract the bolt then you may be able to save it.

However, the likely process is going to be you have to pull the system down and recover all the Freon so you are not messing with this under pressure.

Here is a guide that will help with this:

https://www.2carpros.com/articles/re-charge-an-air-conditioner-system

If you are messing with this while it is pressurized, even a static system has about 90 PSI of pressure and if that bolt is not holding the lines together then all that is, is a rubber o-ring. If it lets go, you are going to get a line blown apart and Freon and oil all over including all over you.

This is not safe.

If it were me, I would rent the equipment from a local parts store, recover the system and repair the line. It is not the best but safer then doing it differently.

Please let us know if you have questions on this. Thanks
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Tuesday, September 7th, 2021 AT 7:42 PM
Tiny
DG7717
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Here are the pictures.
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Wednesday, September 8th, 2021 AT 7:41 AM
Tiny
KASEKENNY
  • EXPERT
Got it. That is just what I understood the issue was. Clearly since the line came off there is no need to recover the Freon as it is all gone now.

However, when you install the new bolt and get the system sealed again, you are going to have to pull it into a vacuum because you have moisture in the system now and you will not get much cooling power with moisture in the system.

Here is a guide on how to do that which is what I put in the last post as well:

https://www.2carpros.com/articles/re-charge-an-air-conditioner-system

Let me know if you have questions on this. Thanks
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Wednesday, September 8th, 2021 AT 11:30 AM
Tiny
DG7717
  • MEMBER
Got it. Thank you very much.
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Wednesday, September 8th, 2021 AT 12:12 PM
Tiny
DG7717
  • MEMBER
Also, Is there a specific product to clean the Freon up with?
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Wednesday, September 8th, 2021 AT 12:17 PM
Tiny
KASEKENNY
  • EXPERT
You are welcome. This depends on what the Freon is on. If it is all over, on plastic and metal parts then I would use engine degreaser to start.

I attached the common product below. Clearly it can be any brand.

If the Freon is mostly on the engine and other engine components then shop solvent or a similar parts cleaner will get rid of it as well.

The engine degreaser which is the first image, needs to be hosed off, so just be careful not to directly hose down the ignition system or modules.

You may have to use a combination of the two but both will get rid of it.
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Wednesday, September 8th, 2021 AT 6:56 PM

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