mwalls54 Posted May 24, 2008 Report Share Posted May 24, 2008 I have used the recharge kits many times on my older trucks and cars. it works great as long as you dont over charge it. just shake up the can and turn it upside down and let it do its thing. Quote Link to comment Share on other sites More sharing options...
Rausche Posted May 24, 2008 Report Share Posted May 24, 2008 R-134B???? Newer vehicles???? My wifes Yukon is an 06' which is newer than my 04' SSS and it said R-134A under the hood. Are you sure? And btw, there no such thing as R-134b lol, R-134a and R-12 (freon, from cars from like 95-below) are the only refrigerants available Yeah I don't know why I thought that... I did some research right after I said that and almost literally slapped myself. Quote Link to comment Share on other sites More sharing options...
supradude123 Posted May 24, 2008 Report Share Posted May 24, 2008 Blackbeast is right. If you havent done it yourself or dont know anyone who has, I'd just take it to a shop.. Blowin your ac system wuld probly suck, ive never done it but im sure it sucks real bad lollll Those kits for 30$ work , but yeah the ac system is a little more advanced than say changing your drop in K&n or wutever, its not that hard but you can screw crap up if you dont know what your doin Quote Link to comment Share on other sites More sharing options...
supradude123 Posted May 24, 2008 Report Share Posted May 24, 2008 No its cool Rausche..i get crud like that mixed up a lot..and who cares about the ac system right...blowers and turbohs an stuf are funner anyhow loolllll. yeah just bein stupid. u prbly just got the old r-12 and the r134a mixed up or somthin Quote Link to comment Share on other sites More sharing options...
misterp Posted May 24, 2008 Report Share Posted May 24, 2008 (edited) OK I got into this on my own truck tonight, and surprise surprise it is way low on A/C charge. Here's the values to check straight from the service manual on the climate control on our trucks: STEP 1 - check static pressure, turn off engine and let A/C system rest for 2-minutes to equalize, then read pressure on low-side port: *If ambient temp is above 16°C (60°F) 345 kPa (50 psi) *If ambient temp is above 24°C (75°F) 483 kPa (70 psi) *If ambient temp is above 33°C (90°F) 690 kPa (100 psi) STEP 2 - check pressures during Max Cool operation: start engine, lower driver's window 5-inches, turn A/C on to max cool, A/C blower fan speed to max, open all A/C duct outlets, turn on recirculation mode, put a thermometer in a center air outlets, and run A/C for 5-minutes while checking for abnormal frosting or noises; then compare the reading on your A/C temp probe, low-side gauge, and high-side gauge to the following chart: * if outside air temp is 13-16°C (55-65°F) - low side should read between 150-246 kPa (22-36 psi), high side between 730-1190 kPa (106-173 psi), center outlet temp should be 12°C (54°F) or less * if outside air temp is 19-24°C (66-75°F) and outside humidity is Below 40% - low side should read between 150-280 kPa (22-41 psi), high side between 900-1390 kPa (131-202 psi), center outlet temp should be 14°C (57°F) or less * if outside air temp is 19-24°C (66-75°F) and outside humidity is Above 40% - low side should read between 179-137 kPa (26-46 psi), high side between 990-1500 kPa (144-218 psi), center outlet temp should be 16°C (61°F) or less * if outside air temp is 25-29°C (76-85°F) and outside humidity is Below 35% - low side should read between 218-328 kPa (32-48 psi), high side between 1240-1640 kPa (180-238 psi), center outlet temp should be 17°C (63°F) or less * if outside air temp is 25-29°C (76-85°F) and outside humidity is 35-60% - low side should read between 236-342 kPa (34-50 psi), high side between 1290-1680 kPa (187-244 psi), center outlet temp should be 18°C (64°F) or less * if outside air temp is 25-29°C (76-85°F) and outside humidity is Above 60% - low side should read between 250-365 kPa (36-53 psi), high side between 1340-1760 kPa (194-255 psi), center outlet temp should be 20°C (68°F) or less * if outside air temp is 30-35°C (86-95°F) and outside humidity is Below 30% - low side should read between 266-386 kPa (39-56 psi), high side between 1500-1940 kPa (218-282 psi), center outlet temp should be 21°C (70°F) or less * if outside air temp is 30-35°C (86-95°F) and outside humidity is 30-50% - low side should read between 280-397 kPa (41-58 psi), high side between 1540-1990 kPa (224-289 psi), center outlet temp should be 22°C (72°F) or less * if outside air temp is 30-35°C (86-95°F) and outside humidity is Above 50% - low side should read between 300-430 kPa (44-62 psi), high side between 1600-2070 kPa (232-300 psi), center outlet temp should be 24°C (75°F) or less * if outside air temp is 36-41°C (96-105°F) and outside humidity is Below 20% - low side should read between 328-439 kPa (48-64 psi), high side between 1810-2240 kPa (263-325 psi), center outlet temp should be 25°C (77°F) or less * if outside air temp is 36-41°C (96-105°F) and outside humidity is 20-40% - low side should read between 337-457 kPa (49-66 psi), high side between 1840-2290 kPa (267-332 psi), center outlet temp should be 26°C (79°F) or less * if outside air temp is 36-41°C (96-105°F) and outside humidity is Above 40% - low side should read between 355-474 kPa (52-69 psi), high side between 1890-2340 kPa (274-340 psi), center outlet temp should be 27°C (81°F) or less * if outside air temp is 42-46°C (106-115°F) and outside humidity is Below 20% - low side should read between 391-491 kPa (57-71 psi), high side between 2130-2500 kPa (309-363 psi), center outlet temp should be 29°C (84°F) or less * if outside air temp is 42-46°C (106-115°F) and outside humidity is Above 20% - low side should read between 397-508 kPa (58-74 psi), high side between 2160-2550 kPa (313-370 psi), center outlet temp should be 30°C (86°F) or less * if outside air temp is 47-49°C (116-120°F) and outside humidity is Below 30% - low side should read between 451-552 kPa (65-80 psi), high side between 2420-2790 kPa (351-405 psi), center outlet temp should be 33°C (92°F) or less In general, when the low-side is not up to pressure then the high side will suffer, and the outlet temp will suffer. So when you have a low-side condition then add more A/C charge and this will increase high-side pressure and hence cool more. OTOH if the low-side is too high, you can damage seals and the compressor. Also, if the low-side is charged within acceptable limits and the high-side is out of limit then check the service manual for further diagnostic information, or take the truck to a A/C specialist. Mr. P. ps - another hint, you can use scanning software to read the A/C pressure on the high-side. Edited May 24, 2008 by Mr. P. (see edit history) Quote Link to comment Share on other sites More sharing options...
blackbeast ss Posted May 24, 2008 Report Share Posted May 24, 2008 right on mr p another thing is if you got a low charge you got a leak some where,what people dont understand is refrigerant does'nt waste ac system is a close system.on a properly close system refrigerant will last longer than 100 years.i work on 20 to 150 ton units at work and deal with this kind of stuff everyday Quote Link to comment Share on other sites More sharing options...
supradude123 Posted May 24, 2008 Report Share Posted May 24, 2008 Whoa thats some serious stuff .. um well, the ac system doesnt have to be charged to perfection lol..but yeah you need to have a guage on the high side while you add coolant to the low side, and you want to watch the pressure when the a/c system turns on (compressor clutch turns on) and make sure it doesnt exceed like 220 or so psi while the clutch is engaged.. I'd have to see pictures of the kit and engine to tell u wut to do if your still gonna do it yourself Quote Link to comment Share on other sites More sharing options...
WI_Dave Posted May 27, 2008 Report Share Posted May 27, 2008 I have used them 3 times and they did work great for me. Although WI is the only state that it is illegal to buy/sell in. I had to go to IL to buy it. Also if your system is low/empty there is a leak. Quick cans may not do much about sealing a leak, but make a temporary fix. Quote Link to comment Share on other sites More sharing options...
ipyro24 Posted June 1, 2008 Report Share Posted June 1, 2008 * if outside air temp is 47-49°C (116-120°F) and outside humidity is Below 30% - low side should read between 451-552 kPa (65-80 psi), high side between 2420-2790 kPa (351-405 psi), center outlet temp should be 33°C (92°F) or less That sucks that when its 116 out your ac will only cool it to 92 I wonder if that is just sitting stationary, and if you are moveing it will cool more... Quote Link to comment Share on other sites More sharing options...
wody Posted June 1, 2008 Report Share Posted June 1, 2008 * if outside air temp is 47-49°C (116-120°F) and outside humidity is Below 30% - low side should read between 451-552 kPa (65-80 psi), high side between 2420-2790 kPa (351-405 psi), center outlet temp should be 33°C (92°F) or less That sucks that when its 116 out your ac will only cool it to 92 I wonder if that is just sitting stationary, and if you are moveing it will cool more... you missed the "92*F or less" part Quote Link to comment Share on other sites More sharing options...
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