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Oil ?

agood1 on Mon September 01, 2008 2:38 PM User is offlineView users profile

Year: 1995
Make: Buick
Model: Riviera
Engine Size: 3.8
Refrigerant Type: 134A

How much oil should I put in this system. It has been flushed with a new dryer, and new compressor. The compressor has 1.5oz of oil installed. Do I need to add more?

mk378 on Mon September 01, 2008 3:01 PM User is offline

Yes, add more. NAPA guide says that car needs a total of 8 oz of type PAG-150 oil. Ideally, drain any oil that comes in a new compressor and put all new in. The PAG will absorb moisture during storage if the ports on the compressor are not tightly sealed.

agood1 on Mon September 01, 2008 5:00 PM User is offlineView users profile

Thanks for the reply. Where can I find the NAPA guide? I also need to know how my freon this car takes.

Thanks again!

iceman2555 on Tue September 02, 2008 7:51 AM User is offlineView users profile

Quote
Originally posted by: mk378
Yes, add more. NAPA guide says that car needs a total of 8 oz of type PAG-150 oil. Ideally, drain any oil that comes in a new compressor and put all new in. The PAG will absorb moisture during storage if the ports on the compressor are not tightly sealed.

The amount of lubricant stated is a TOTAL system requirement. This is the amount of lubricant to be added to the system if the system is flushed and prepared properly. This amount of lubricant should never be added to the compressor. The compressor may suffer severe damage if this TOTAL amount is introduced to the compressor. Add app 25-30% (max 4 oz) of the lube charge to the suction side of the compressor. The remainder may be added to the accumulator...simply pour into the inlet side of the evap...close the system...evac and recharge...the lubricant will be dispersed thru the system. This procedure also allows for a extra amount of lubricant to maintain compressor lubrication during the recharge/initial start up mode.




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The strongest reason for the people to retain the right to keep and bear arms is, as a last resort, to protect themselves against tyranny in government.
Thomas Jefferson

agood1 on Tue September 02, 2008 8:35 AM User is offlineView users profile

Thanks for the great info.

I have one more question. As I removed the old Compressor, I found an electrical connection on the back side of the compressor itself. The replacement compressor does not have this connection. Any idea what this connection does, and can I just bypass it?

Thanks again.

iceman2555 on Tue September 02, 2008 8:48 AM User is offlineView users profile

Remove the sensor from the old compressor and install in the new compressor.

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The strongest reason for the people to retain the right to keep and bear arms is, as a last resort, to protect themselves against tyranny in government.
Thomas Jefferson

agood1 on Tue September 02, 2008 8:52 AM User is offlineView users profile

I tried to remove it....but could not get it out. I think I will destroy it if I pull any harder....yes, I removed the sir clip before I pulled on it.
What does it do?

Chick on Tue September 02, 2008 8:27 PM User is offlineView users profile

Not sure, but could be the fan switch, high pressure cutout, but clean the area well around it, spray WD40 and let it soak, then gentle rock nit until it loosens up..You need the switch,, If you break it, go to a junk yard and ask for one off of a core, as long as the color is the same.. If nothing else, try to get the electrical connector, I find it easier to get them out when clean with the electrical connector on, gives more leverage and doesn't break the plastic on the switch..but go slowly until it breaks free from the O ring..hope this helps..

Use a pick to clean out all around the switch when soaked with the WD40 or other penetrating lube.. Also lube the O ring when you install it in the new compressor..

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Chick
Email: Chick

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Freedoms just another word for nothing left to lose

agood1 on Tue September 02, 2008 9:20 PM User is offlineView users profile

I have already installed the compressor and charged it.....I assume if I pull the cover on the back of it to install this switch, I will loose the charge.....correct?

Chick on Tue September 02, 2008 9:22 PM User is offlineView users profile

yes you will, it's under pressure, but you need the switch installed..

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Chick
Email: Chick

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Freedoms just another word for nothing left to lose

agood1 on Tue September 02, 2008 9:25 PM User is offlineView users profile

seems to be working fine without it.......

Chick on Tue September 02, 2008 9:27 PM User is offlineView users profile

the moment it is needed....it won't be there...it won't be working well after that..But we'll help you fix it again... Gm tech should be along to let you know what that particular switch is for..I don't have the wiring diagrams for each car here at the moment...

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Chick
Email: Chick

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Freedoms just another word for nothing left to lose

TRB on Wed September 03, 2008 11:38 AM User is offlineView users profile

Looks to be a cooling fan switch. I would not suggest running the compressor as currently configured.

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agood1 on Wed September 03, 2008 1:07 PM User is offlineView users profile

Cooling fan? You mean the fans on the radiator? If so, they come on when I turn on the AC just like they are supposed to. Even with the switch disconnected.

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