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Different V5 Control Valves

pf24 on Mon June 01, 2009 5:27 PM User is offline

Year: 1997
Make: Pontiac
Model: Bonneville
Engine Size: 3.8

Hi, does anyone know the affect the different V5 colored control valves will have on pressure?

From the internet I found this data on "valve seating pressure"
(Green - 37.5PSI) (Yellow - 40PSI) (Purple - 41.5PSI) (BLUE - 42PSI) (BROWN - 43PSI) (RED - 44PSI) (ORANGE - 45PSI)

Would this mean using a green valve would result in the lowest suction pressure or a orange valve?

My valve is not original. Does anyone know what color valve would of come on a 97 pontiac bonneville?

Thanks

TRB on Mon June 01, 2009 7:21 PM User is offlineView users profile

Brown or Orange are R134a control valves.

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GM Tech on Mon June 01, 2009 7:48 PM User is offline

The pressures listed are the destroke point- so yes a 37 psi runs you closer to freeze-up then a 40 psi-- so the problem with going to the lowest possible is that it is probably not the one for your car-- freeze-up can be just as bad or worse than poor cooling- my record for center vent tempis 17 degf-the system had never had a vacuum pulled prior to charging-- took 20 minutes and vent temp went to 80-- so you need the one calibrated for your car. I can tell you which one- when I get back to work.....

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The number one A/C diagnostic tool there is- is to know how much refrigerant is in the system- this can only be done by recovering and weighing the refrigerant!!
Just a thought.... 65% of A/C failures in my 3200 car diagnostic database (GM vehicles) are due to loss of refrigerant due to a leak......

pf24 on Mon June 01, 2009 11:05 PM User is offline

Thanks GM Tech!!

pf24 on Sat June 06, 2009 10:48 PM User is offline

Hey GM Tech,

Did you ever find out what type of valve I need. I am excited to order it and work on my AC.

Greatly appreciated!! Thanks

GM Tech on Mon June 08, 2009 11:12 AM User is offline

Sorry so late- just got back to work today--

Yours is/was a BROWN control valve-- probably the most common one ever made!

-------------------------
The number one A/C diagnostic tool there is- is to know how much refrigerant is in the system- this can only be done by recovering and weighing the refrigerant!!
Just a thought.... 65% of A/C failures in my 3200 car diagnostic database (GM vehicles) are due to loss of refrigerant due to a leak......

Edited: Mon June 08, 2009 at 12:36 PM by GM Tech

pf24 on Wed June 10, 2009 12:30 AM User is offline

Thanks GM Tech!!

Quick Question; What is the perfect center vent, low blow or hi blow temp I can expect on the V5 system?

Thanks!!

GM Tech on Wed June 10, 2009 7:45 AM User is offline

That all depends on the vehicle.....not the compressor--your Bonny should see high 30's/low 40's on low fan recirc after 30 minute stabilize, in shade all windows up

-------------------------
The number one A/C diagnostic tool there is- is to know how much refrigerant is in the system- this can only be done by recovering and weighing the refrigerant!!
Just a thought.... 65% of A/C failures in my 3200 car diagnostic database (GM vehicles) are due to loss of refrigerant due to a leak......

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