1999 Chevy Suburban COOL

Tiny
STIFF
  • MEMBER
  • 1999 CHEVROLET SUBURBAN
  • V8
  • 4WD
  • AUTOMATIC
  • 138,000 MILES
WE HAVE REPLACED WITH NEW COMPRESSOR AND ADDED THE OIL AND FREON AND THE TEMPERATURE DOES NOT GET BELOW 60 DEGREES. WHEN THE REAR IS TURNED ON THE FRONT TEMP SEEMS TO RISE A COUPLE OF DEGREES. WE DONT KNLOW IF WE NEED TO CHANGE THE ACCUMULATOR, ORFICE, OR THE EXPANSION VALVE IN THE REAR
Thursday, June 26th, 2008 AT 1:41 PM

6 Replies

Tiny
DOCFIXIT
  • MECHANIC
  • 18,828 POSTS
You must replace the accumulator whenever system is open. Air and moisture enter and the AC will never cool. Did old compressor shell ie make alot of noise and quit? If so debris is in the system. The orfice tube must be replaced for debris in screen.
How long did you vaccum down the system?
Let me know
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Thursday, June 26th, 2008 AT 1:54 PM
Tiny
STIFF
  • MEMBER
  • 4 POSTS
[ WE VACCUMED DOWN 1 HOUR SINCE THIS IS A NEW COMPRESSOR CAN WE REPLACETHE ACCUMULATOR AND ORFICE WITHOUT REPLACING THE COMPRESSOR AGAIN quote="Docfixit"]You must replace the accumulator whenever system is open. Air and moisture enter and the AC will never cool. Did old compressor shell ie make alot of noise and quit? If so debris is in the system. The orfice tube must be replaced for debris in screen.
How long did you vaccum down the system?
Let me know[/quote]
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Thursday, June 26th, 2008 AT 2:22 PM
Tiny
DOCFIXIT
  • MECHANIC
  • 18,828 POSTS
Yes replace both and vac for 4 hours this is a big system and need all moisture removed. Did you pour oil out from new comp and measure it some come with enough for whloe system. If not entire system need add 1oz to accum.
Let me known will have that baby spiting ice
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Thursday, June 26th, 2008 AT 2:37 PM
Tiny
STIFF
  • MEMBER
  • 4 POSTS
The new compressor came with no oil, we added pag 150 oil 11 ounces. SO OUR NEXT STEP WE WILL REPLACE THE ACCUMALATOR AND ORFICE. I TAKE IT THAT THE COMPRESSOR DOES NOT NEED TO BE REPLACED.
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Thursday, June 26th, 2008 AT 2:48 PM
Tiny
DOCFIXIT
  • MECHANIC
  • 18,828 POSTS
11 oz sounds like enough just give the accu 1oz. Can not see why comp. Wil lhave any problems.
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Thursday, June 26th, 2008 AT 2:53 PM
Tiny
STIFF
  • MEMBER
  • 4 POSTS
[DO YOU BELIEVE THAT THE 134 A ARTIC AIR MAKES A DIFFERENCE ON THE 50 PERCENT COOLER AIR TEMPERATUREquote="Docfixit"]11 oz sounds like enough just give the accu 1oz. Can not see why comp. Wil lhave any problems.[/Quote]
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Thursday, June 26th, 2008 AT 3:10 PM

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