08-14-2010, 07:29 PM
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#1
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AutoCross Alero
Join Date: Nov 2003
Location: South Texas
Posts: 2,759
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my a/c sucks.
I spent the better part of the day, replacing my a/c compressor, receiver/dryer, expansion valve, flushed the a/c system added in proper oil got pressures running within gm factory specs and it only gets to 70* at idle! depending the heat of the day 55* at freeway speeds. i'm very good with a/c work, but my car refuses to agree with me on output temperatures. the only piece i havent replaced is the condenser, but it flushed clean as far as i could tell.
any ideas?
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08-14-2010, 07:46 PM
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#2
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636 whp
Join Date: Aug 2006
Location: AZ
Posts: 11,876
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edit: my original message is likely irrelevant to your specific situation
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08-14-2010, 08:19 PM
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#3
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GLS member
Join Date: Jul 2010
Location: moncton, nb
Posts: 1,307
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have you tried different refridgerent? it may just be whatever kind you were using
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08-14-2010, 09:55 PM
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#4
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AutoCross Alero
Join Date: Nov 2003
Location: South Texas
Posts: 2,759
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134a same as factory.
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08-14-2010, 11:45 PM
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#5
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GLS member
Join Date: Nov 2007
Location: Fort Knox area, KY
Posts: 2,120
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Quote:
Originally Posted by jabartram
I spent the better part of the day, replacing my a/c compressor, receiver/dryer, expansion valve, flushed the a/c system added in proper oil got pressures running within gm factory specs and it only gets to 70* at idle! depending the heat of the day 55* at freeway speeds. i'm very good with a/c work, but my car refuses to agree with me on output temperatures. the only piece i havent replaced is the condenser, but it flushed clean as far as i could tell.
any ideas?
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What were the original symptoms, and why had to replace so many components?
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08-15-2010, 12:25 AM
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#6
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AutoCross Alero
Join Date: Nov 2003
Location: South Texas
Posts: 2,759
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Quote:
Originally Posted by AleroB888
What were the original symptoms, and why had to replace so many components?
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6 years old and im just like that, i'm gonna go ahead and replace the condenser.
temperature output is just not satisfactory.
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08-15-2010, 12:29 AM
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#7
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Premier V.I.P. Member
Join Date: Sep 2008
Location: Quebec
Posts: 998
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How long did you do the vacuum before charging the system and how much r134a did you put back in ???
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08-15-2010, 12:50 AM
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#8
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AutoCross Alero
Join Date: Nov 2003
Location: South Texas
Posts: 2,759
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Quote:
Originally Posted by guiguilandry
How long did you do the vacuum before charging the system and how much r134a did you put back in ???
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i'm gonna put on one of our a/c machines at my shop this week.
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08-15-2010, 01:40 AM
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#9
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Moderator
Join Date: Nov 2004
Location: Long Grove, IL
Posts: 5,002
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It should be for at least 1/2 hour on the vacuum.
__________________
Cliff Scott
2004 Alero GX w/sport pkg - Sold, living somewhere in WI now.
2011 Saab 9-5 Turbo4 M6
2004 Corvette Convertible M6
1994 Chevy Beretta - Quad4/M5
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08-15-2010, 01:45 AM
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#10
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AutoCross Alero
Join Date: Nov 2003
Location: South Texas
Posts: 2,759
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Quote:
Originally Posted by Cliff8928
It should be for at least 1/2 hour on the vacuum.
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30 inches of vacuum for 45 mins. twice today.
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08-15-2010, 02:29 AM
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#11
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Moderator
Join Date: Nov 2004
Location: Long Grove, IL
Posts: 5,002
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The cooling fans are running when you have the A/C on?
You said you changed the expansion valve. Did you mean the orifice tube? I didn't think the Alero had a TXV.
__________________
Cliff Scott
2004 Alero GX w/sport pkg - Sold, living somewhere in WI now.
2011 Saab 9-5 Turbo4 M6
2004 Corvette Convertible M6
1994 Chevy Beretta - Quad4/M5
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08-15-2010, 10:01 AM
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#12
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AutoCross Alero
Join Date: Nov 2003
Location: South Texas
Posts: 2,759
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Quote:
Originally Posted by Cliff8928
The cooling fans are running when you have the A/C on?
You said you changed the expansion valve. Did you mean the orifice tube? I didn't think the Alero had a TXV.
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cooling fans work, yes orifice tube, expansion valve is common for trucks, its habit.
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08-16-2010, 12:25 AM
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#13
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Moderator
Join Date: Nov 2004
Location: Long Grove, IL
Posts: 5,002
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Did you use a fixed or variable orifice tube? Your replacement compressor was a reman or new? Does it have the correct control valve in it (it's held in with a snap ring on the side of the rear cover)? Is the screen on the suction side of the compressor clean if it's there?
Is the evaporator core ridiculously dirty? You didn't mention replacing it.
__________________
Cliff Scott
2004 Alero GX w/sport pkg - Sold, living somewhere in WI now.
2011 Saab 9-5 Turbo4 M6
2004 Corvette Convertible M6
1994 Chevy Beretta - Quad4/M5
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08-24-2010, 06:06 PM
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#14
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GX Member
Join Date: Aug 2010
Location: Brooklin, Ontario
Posts: 148
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Mine was having problems, and would just blow warm.
Changed the AC Clutch, pulley, and serpentine belt. Haven't had a problem since.
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