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Cold-weather charging

Dave in Texas on Thu December 04, 2008 8:34 AM User is offlineView users profile

I replaced my engine and need to evacuate/recharge AC system. I've always done warm/hot weather charging, so I'm unsure correct cold-weather procedure....specifically guage readings. It's not 'winter cold' here, but I expect to do the job when the temps are in the high 50s/low-60s or so. Thanks for any advice, I always appreciate help/info/advice.

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At 2, I went home with a 10. At 10 I woke up with a 2 !!

GM Tech on Thu December 04, 2008 9:38 AM User is offline

If you weigh in the charge- then no big deal- I never worry even when it's warm out- always weigh it in anyway- then check pressures.....

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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......

Dave in Texas on Fri December 05, 2008 8:52 PM User is offlineView users profile

I retrofitted this system to 134 in 1998. Replaced orfice-tube/accumulator earlier this summer. I'll just install the 80% of the R12 charge and go from there. Don't know what the pressure readings would be in cold weather though. Low reading should be the same as in warm weather though...correct? Thanks

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At 2, I went home with a 10. At 10 I woke up with a 2 !!

awtoys.net on Sat January 31, 2009 10:17 AM User is offline

thanks for informing ! its very useful information !!


www.awtoys.net

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www.awtoys.net

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