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2001 Chevy Silverado High head pressure

Tiny
SAMAY
  • MEMBER
  • 2001 CHEVROLET SILVERADO
Air Conditioning problem
2001 Chevy Silverado V8 Two Wheel Drive Automatic

High head pressure 425+, low side 45, with half charge, 14oz. Replaced orifice screen. Removed orifice, reconnected line and blew compressor air through lines at compressor. Blew fine through both sides. Installed reman. Compressor and orifice screen, still have high head, why?
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Sunday, February 21st, 2010 AT 2:13 PM

3 Replies

Tiny
DOCFIXIT
  • MECHANIC
  • 18,828 POSTS
Hi
What was original complaint? What has been replaced? Are your readings in kPA or psi? Was oil added to system?
Let me know
Thanks for donate
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Monday, February 22nd, 2010 AT 2:38 PM
Tiny
SAMAY
  • MEMBER
  • 2 POSTS
Original problem same as now. Replaced compressor and orifice screen. Used Pag 46 oil 8oz. Readings are psi. As stated in original email, removed orifice put line back together removed two line from compressor blew compressed air through both sides no noted restriction. Original charge was a few ounces short and system, oil clean. Other than adding a little freon through the years components were original and untouched.

Thanks,
Robert
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Monday, February 22nd, 2010 AT 5:42 PM
Tiny
DOCFIXIT
  • MECHANIC
  • 18,828 POSTS
Did you drain oil from compressor before install? Was accumulator replaced? System flushed? 8oz. Is total charge some oil will be in condensor and accumulator. If you answer no to any questions then may have too much oil in system. Did you bypass high pressure cutoff?
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Tuesday, February 23rd, 2010 AT 9:26 AM

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