A/C failure after enging install

Tiny
BEN73
  • MEMBER
  • 1996 SUBARU IMPREZA
  • 2.2L
  • 4 CYL
  • AWD
  • AUTOMATIC
  • 190,000 MILES
I just recently installed a engine in my Impreza. This A/C was working fine before I started. During the enging removal, I unbolted the compressor as well as disconnected any wires and simply pulled the compressor over to the side to complete the engine. In order to make enough room for the work I had to tip the compressor almost upside down. With the lines attached. It stayed this way for a few days.
After installing the new engine I bolted up the compressor to it previous position. Shortly after that I could hear a hiss from the rear high side hose that connects to the rear of the compressor. It was clear that the o ring seal had failed due to my over stressing this connection. After replacing the o ring and letting this system sit on a vacuum for well over an hour I verified that no leak was present.
I added the recommended amount of 134a per the specification sticker under the hood.
What I dont understand is the low side readings are anywhere between 8 - 10 psi ( entirely to low ) and a high side reading of 250 psi.
I know this system has the right amount of refrigerant but the low side readings are to low and no cool air.
Also when I test drove the vehicle I had turned on the A/C and as I accelerated I could hear a fast loud hiss of pressure being released.
Could you please point me in the right direction to fix this?

Any help would be great.

Thanks
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Tuesday, May 5th, 2015 AT 6:25 PM

7 Replies

Tiny
CADIEMAN
  • MEMBER
Why'll the compressor was leaking after removal it was leaking oil and freon out.U should have removed the compressor then drained the oil. Then reinstalled it with a new dryer. Then vacuemed it down to -30 and see if it held vacuem. Then pick up a oil charge in a can and tfhe proper amount of freon in cans. Because it was over full and spitting it out of the pressure releaf valve in the back of the compressor why'll u drove it.
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Tuesday, May 5th, 2015 AT 8:11 PM
Tiny
BEN73
  • MEMBER
No sir, it was not overcharged. I did use 2- 12 oz cans of refrigerant ( 24 oz only ). It was vacuumed out for over an hour and held vacuum for two before I added the refrigerant. So having added the correct amount of refrigerant to the system, could you tell me why I might only have a 10 psi reading on the low side? Could the tiping the compressor over somehow caused an obstruction?
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Wednesday, May 6th, 2015 AT 5:37 PM
Tiny
CADIEMAN
  • MEMBER
U needed to locate the orfise tube filter. And replace it. It's usseally
in the high side hose or evaporator. Just go to the dealer for it's location.
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Thursday, May 7th, 2015 AT 12:12 PM
Tiny
CADIEMAN
  • MEMBER
U should have replaced the dryer anytime u open the system.
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Thursday, May 7th, 2015 AT 12:20 PM
Tiny
BEN73
  • MEMBER
Well. You have not really answered my questions. You have however been good about pointing out " what I should have done ". Thanks.
What I was trying to understand is what might have caused the an obstruction in the first place.
You sir, need to work on your communication and maybe answer questions folks ask.
I made a donation hoping for an answer. What I received was a headache.
I will not bother you any longer with this nor will I ever recommend your site to anyone.

This has been a complete waste of time and donation on my part.

Have a nice day.
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Thursday, May 7th, 2015 AT 12:58 PM
Tiny
CADIEMAN
  • MEMBER
10-250 is not a obstruction because both readings would be high if u had a blockage u will to try and replace the orfice filter to fix this. Thats all
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Thursday, May 7th, 2015 AT 2:28 PM
Tiny
CADIEMAN
  • MEMBER
I'm sorry I have fallen short on your question. The 250 is your problem not the 10. Nobody can tell u why it's reading ten. The only reason would be low freon and u said it was right. The only reason for the 250 on the high side is a bad orfice tube filter.
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Thursday, May 7th, 2015 AT 4:00 PM

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