#1752629 - 04/25/09 03:19 PM
A/C System Tune Up
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2vmodular
Poobah
Registered: 04/11/01
Posts: 6153
Loc: New England
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I recently tuned up the a/c system in my 1998 crownvic. First part of the project was to replace the o-rings.
the condensor in the 1998 crown vic uses "peanut" connections.
the passenger's side top shock absorber nut is really easy to access with the lower liquid line removed
the spring-locks at the compressor manifold tubes took a little persistence to remove. had to spin the spring lock tool around the connection several times to break the corrosion free.
here's some of the old o-rings next to the new o-rings.
the old o-rings were still reasonable flexible, but they were pressed kind of flat and didn't seal too well anymore.
here are the flexible hoses off of the car
all of the spring-lock connections appear to use 3 o-rings in 1998
here's one of the peanut condensor fittings
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#1752631 - 04/25/09 03:20 PM
Re: A/C System Tune Up
[Re: 2vmodular]
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2vmodular
Poobah
Registered: 04/11/01
Posts: 6153
Loc: New England
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this is the hose that was in front of the compressor clutch when the old clutch overheated badly and threw molten rubber at it.
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#1752632 - 04/25/09 03:23 PM
Re: A/C System Tune Up
[Re: 2vmodular]
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2vmodular
Poobah
Registered: 04/11/01
Posts: 6153
Loc: New England
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the muffler in this hose appears to be just an empty cylinder
decided to install a new lower liquid line as the earlier cars often get lots of corrosion on this peice.
the hoses with the new o-rings installed
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#1752633 - 04/25/09 03:25 PM
Re: A/C System Tune Up
[Re: 2vmodular]
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2vmodular
Poobah
Registered: 04/11/01
Posts: 6153
Loc: New England
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here are the two nuts which hold the hoses onto the condensor. note that pre-1998 cars used spring lock connections for the condensor.
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#1752635 - 04/25/09 03:26 PM
Re: A/C System Tune Up
[Re: 2vmodular]
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2vmodular
Poobah
Registered: 04/11/01
Posts: 6153
Loc: New England
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and the hoses back on the condensor
you'll want to remove the battery from the car to get at these connections
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#1752636 - 04/25/09 03:28 PM
Re: A/C System Tune Up
[Re: 2vmodular]
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98P73_IRAQ
Over the Hill
Registered: 04/26/08
Posts: 2083
Loc: iraq-baghdad-hell's street
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very useful,what about the compressor and other components?
_________________________
http://www.supermotors.net/users/vic1992LX  @@IRAQ FREEDOM PANTHER@@ hello, my CVN name was "vic1992LX" 1998 crown vic P73, 120XXX miles, 180F tstat, AWSF32PP plugs, 10w40 synthetic LIQUI MOLY,2.73 conventional axle, , still working on it. dual exhaust coming soon, PI kit swap from ADTR coming soon.
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#1752637 - 04/25/09 03:29 PM
Re: A/C System Tune Up
[Re: 2vmodular]
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2vmodular
Poobah
Registered: 04/11/01
Posts: 6153
Loc: New England
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a new accumulator/drier and a/c compressor are being installed.
the yellow tag on the top says that the compressor is pre-filled with 7oz of pag46 oil.
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#1752639 - 04/25/09 03:33 PM
Re: A/C System Tune Up
[Re: 2vmodular]
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2vmodular
Poobah
Registered: 04/11/01
Posts: 6153
Loc: New England
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you'll want to install the manifold block onto the compressor before bolting the compressor to the engine block because the exhaust manifold is directly above the pinch bolt.
also, for installation it's easier if you leave the hoses off of the compressor. if the hoses are installed, you'll need a prybar to get everything lined up properly so that the bolts will pass through the compressor into the engine block mounting bosses.
and you'll want to also want to transfer the wiring bracket from your old compressor onto the new compressor.
the new compressor came pre-gapped and the clutch did not need to be removed to insert shims.
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#1752642 - 04/25/09 03:36 PM
Re: A/C System Tune Up
[Re: 2vmodular]
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2vmodular
Poobah
Registered: 04/11/01
Posts: 6153
Loc: New England
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you'll want some pag oil to lubricate the new o-rings prior to installation. and also to pour into the accumulator/drier.
you'll also want some vacuum pump oil. i had to mail order this stuff as the local parts clerks didn't have a clue was vacuum pump oil was and always wanted to sell me pag or ester oil instead.
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#1752645 - 04/25/09 03:39 PM
Re: A/C System Tune Up
[Re: 2vmodular]
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2vmodular
Poobah
Registered: 04/11/01
Posts: 6153
Loc: New England
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pulled the system down to close to -30 with a vacuum pump to boil off the moisture in the system.
the blue hose is connected to the low pressure suction side. the red pressure hose to the high side.
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#1752648 - 04/25/09 03:48 PM
Re: A/C System Tune Up
[Re: 2vmodular]
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2vmodular
Poobah
Registered: 04/11/01
Posts: 6153
Loc: New England
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let the car sit overnight for several hours, and the system still had a nice vacuum on it in the morning. jumpered the a/c cycle switch with a paperclip, and used a can tap to install 3 12oz cans of r134 refrigerant. (factory spec is 38 oz of refrigerant so the system is a couple ounces under-charged).
But i am now getting vent discharge temperatures inside the car at ~35 fahrenheit and the accumulator is sweating nicely from condensing humidity in the ambient air.
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#1752651 - 04/25/09 03:51 PM
Re: A/C System Tune Up
[Re: 2vmodular]
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98P73_IRAQ
Over the Hill
Registered: 04/26/08
Posts: 2083
Loc: iraq-baghdad-hell's street
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how much the new accumulator/drier cost?wait there is no new compressor or drier here...
_________________________
http://www.supermotors.net/users/vic1992LX@@IRAQ FREEDOM PANTHER@@ hello, my CVN name was "vic1992LX" 1998 crown vic P73, 120XXX miles, 180F tstat, AWSF32PP plugs, 10w40 synthetic LIQUI MOLY,2.73 conventional axle, , still working on it. dual exhaust coming soon, PI kit swap from ADTR coming soon.
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#1752676 - 04/25/09 04:13 PM
Re: A/C System Tune Up
[Re: 2vmodular]
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98P73_IRAQ
Over the Hill
Registered: 04/26/08
Posts: 2083
Loc: iraq-baghdad-hell's street
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the problem is with shipping.
_________________________
http://www.supermotors.net/users/vic1992LX@@IRAQ FREEDOM PANTHER@@ hello, my CVN name was "vic1992LX" 1998 crown vic P73, 120XXX miles, 180F tstat, AWSF32PP plugs, 10w40 synthetic LIQUI MOLY,2.73 conventional axle, , still working on it. dual exhaust coming soon, PI kit swap from ADTR coming soon.
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