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1993 Mazda MX3 AC Compressor HPBV

Tiny
CJC93MX3
  • MEMBER
  • 1993 MAZDA MX3
  • FWD
  • MANUAL
  • 150,000 MILES
I have a 1993 Mazda MX3, and the other day I noticed it was running poorly, with the AC on, when I checked under the hood I noticed that the Compressor was blowing the freon out of the High pressure blow out valve located on the rear of the compressor housing. Is there an available replacement valve for this? It appears to be a once and done scenario for the valve as it will not hold any freon that is added. Any help would be greatly appreciated as it is hot here in Texas and only getting hotter. Thanks.
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Thursday, July 14th, 2011 AT 2:44 PM

4 Replies

Tiny
WRENCHTECH
  • MECHANIC
  • 20,761 POSTS
Why would you be trying to add it when you haven't found the problem that made it blow off in the first place? That is a safety valve that blows right before the rest of the system does. There is a reason you have pressures that high and you need to find them before anything else.
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Thursday, July 14th, 2011 AT 3:01 PM
Tiny
CJC93MX3
  • MEMBER
  • 3 POSTS
Well I know the reason it blew was it was over pressure due to a faulty guage that was used when checking the pressure, which led to the addition of more freon. Now I am trying to find a new valve. It was a simple case of adding too much freon to the system that caused the whole problem.
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Thursday, July 14th, 2011 AT 3:23 PM
Tiny
WRENCHTECH
  • MECHANIC
  • 20,761 POSTS
This is the whole reason those "death kits" should be outlawed. I suggest you get it to an experienced A/C tech to get resolved. He may have access to a replacement blow off valve.
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Thursday, July 14th, 2011 AT 3:33 PM
Tiny
CJC93MX3
  • MEMBER
  • 3 POSTS
I agree, or at least they could take some responsibility for damages due to shotty guages, I've read around and it seems pretty typical that these kits have crappy guages. Still I would like to find the replacement valve and do that portion myself, as I know that AC work is not cheap and it is typically one thing you can be guaranteed you will get gyped on. So I could handle the Vacuum and recharge from the shop but would rather do the repairs myself being the system is already empty. Any help on where I could find this part would be appreciated. Thanks.
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Thursday, July 14th, 2011 AT 6:48 PM

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