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Bonneville GXP/ Northstar Powered Cars Discuss your Bonneville GXP and/or any other Northstar powered Olds or Cadillac... Including the 3.5L Twin Cam V6 (Short Star ) 4.0L and 4.6L Northstar V8's. Please use General Chat for non-mechanical issues, and Performance and Brainstorming for improvements.

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Old 05-24-2010, 03:56 PM   #11
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lol thanks

is there any threads on how to recharge it? i think mine might need it,

or wait, how do i check if i need a recharge? measure the pressure?
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Old 05-24-2010, 07:30 PM   #12
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This is what i got the other day... The gauge is simple to read.. All u need to do is hook it up to the Low port of the ac and check the gauge. Mine was at max so i didn't need to add any, but my intrepid and the Grand prix was almost low..
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Old 05-24-2010, 08:01 PM   #13
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k so i just bought this right now

how do i know which one is the low port? there are two ports here
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and this kit should work right? it says 12a but also says replaces 134a
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EDITED:

do i charge both high and low or only low?
and how many PSI charging/should be reading in high and low

thanks
samz
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Old 05-27-2010, 01:41 PM   #14
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anyone???
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Old 05-27-2010, 05:54 PM   #15
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the hose only fits one of the ports. you fill til the needle of the gauge is on the high side of the green area
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Old 05-27-2010, 06:34 PM   #16
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I have done driveway repairs on auto ACs for quite a while on both R12 and R134A systems. It'* not for the faint of heart but you can do it yourself and save a ton of money. If you are serious about doing the repairs yourself you need to buy a gauge set such as the one illustrated. This set was on sale at Harbor Freight for about $40 and has the hi and low pressure gauges, the hoses needed and the quick connect adapters for R134A systems. The main danger in doing it yourself in overcharging the system. Too much refrigerant in the system will shorten the life of the compressor seals and lead to compressor failure. The only way to know for sure how much refrigerant is in the system is by reading the pressures indicated on the gauges. This gauge set came with basic instructions for use. You also need vehicle specific data from the vehicle'* A/C performance table. The table I have attached is from the service manual I have for the 2002 SSEi I owned before my '05 GXP and should work because the refrigerant charge of 2.2 lbs is the same for both vehicles. It shows what the hi/lo side readings should be for specific air temperature and humidity ranges because both will affect the pressure readings obtained.

Poor AC performance that happens over time usually indicates loss of refrigerant due to a leak. Leaks can occur at the valves on the service ports or at the o-ring seals where the hoses connect to other fixtures. My experience has been that if the leak is gradual a can of the stop-leak may help. It is easy to use and can be put in the system at the same time you are topping off with fresh R134A.

I know this is a lot to digest but if you have the tools and are willing to do the work you can fix many auto A/C problems yourself and save a lot of cash.

Good luck!
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Old 05-30-2010, 12:33 PM   #17
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Hi guys,

I have charged the system with 1 pound of 134A. The pressure is a little low, but the results are great. I need to get another can to top it off.

You guys are the best!!! I wish I had thought to do this earlier in the diagnosis of the problem... It seems that several of us GXP owners needed the same advice.

Thanks again!
Jeff R
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Old 05-30-2010, 10:51 PM   #18
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Nice Looking GXP there. Cranberry Metallic FTW! LOL
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Old 05-31-2010, 12:28 PM   #19
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Thanks for the compliment! I trust yours is in the same paint...I do not know what FTW stands for.
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Old 05-31-2010, 12:40 PM   #20
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Means "For The Win" The original paint is still sorta there Its tucked under a few coats of marbleizing.

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