AC recharge valves...
05-18-2009, 01:48 AM
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w203,ka7,e39
AC recharge valves...
hey all, ive search on this forum and looked everywhere but i can not find the high side valve. i found the low side easly.
Thanks in advance.
edit: sorry, its a 02 c240
Thanks in advance.
edit: sorry, its a 02 c240
Last edited by smartjay28; 05-18-2009 at 02:04 AM.
05-18-2009, 11:04 AM
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02' C230k Sport Coupe
As far as I know you need to recharge your system on the low side which usually has a black cap and is located to the right of the engine. To be honest if you can't find the high side valve then you shouldn't have any business with it. Are you trying to recharge with R134a your system? Be careful that if you are trying the high side the refrigerant can explode...
05-18-2009, 11:50 AM
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w203,ka7,e39
As far as I know you need to recharge your system on the low side which usually has a black cap and is located to the right of the engine. To be honest if you can't find the high side valve then you shouldn't have any business with it. Are you trying to recharge with R134a your system? Be careful that if you are trying the high side the refrigerant can explode...
thanks anyways!
05-18-2009, 12:26 PM
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05-18-2009, 02:43 PM
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ok so i looked in my Haynes manual and then took a pic of what they attached the recharge kit to. if someone has actually done this please back me up but i am almost 100 percent sure that this is the low side charging port. wow i just looked at a pic i think i see oil dam it now i have to go back and check.
Last edited by samaritrey; 05-18-2009 at 02:52 PM.
05-18-2009, 02:51 PM
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ok so i looked in my Haynes manual and then took a pic of what they attached the recharge kit to. if someone has actually done this please back me up but i am almost 100 percent sure that this is the low side charging port. wow i just looked at a pic i think i see oil dam it now i have to go back and check.
thanks tho.
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05-18-2009, 03:36 PM
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'05 C230K SS
Page 29 of this PDF:
http://www.buellwinkle.com/W203HVAC.pdf
Although, I think they may have changed that at some point. I recharged the 134a in my 2005 C230 a few weeks ago, and I think the high side was on the driver's side just a little further down the line from the low side (closer to the driver's side headlight). That's what it looked like at least. I wasn't too concerned about finding it, since I was only checking pressure and recharging on the low side. I did take the cap off just to check it out, and it was a larger diameter valve, which would obviously not fit with a low side measuring/recharge connector.
http://www.buellwinkle.com/W203HVAC.pdf
Although, I think they may have changed that at some point. I recharged the 134a in my 2005 C230 a few weeks ago, and I think the high side was on the driver's side just a little further down the line from the low side (closer to the driver's side headlight). That's what it looked like at least. I wasn't too concerned about finding it, since I was only checking pressure and recharging on the low side. I did take the cap off just to check it out, and it was a larger diameter valve, which would obviously not fit with a low side measuring/recharge connector.
05-18-2009, 04:25 PM
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Please note that the aircon compressor has no clutch. If the gas pressure in the system is too low the pressure safety switch will not allow the unit to run.
05-18-2009, 04:37 PM
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How about doing a write up DIY?
I've never charged my AC but it takes a long time to cool...
it would be great to read on something from someone who has done it.
I've never charged my AC but it takes a long time to cool...
it would be great to read on something from someone who has done it.
Page 29 of this PDF:
http://www.buellwinkle.com/W203HVAC.pdf
Although, I think they may have changed that at some point. I recharged the 134a in my 2005 C230 a few weeks ago, and I think the high side was on the driver's side just a little further down the line from the low side (closer to the driver's side headlight). That's what it looked like at least. I wasn't too concerned about finding it, since I was only checking pressure and recharging on the low side. I did take the cap off just to check it out, and it was a larger diameter valve, which would obviously not fit with a low side measuring/recharge connector.
http://www.buellwinkle.com/W203HVAC.pdf
Although, I think they may have changed that at some point. I recharged the 134a in my 2005 C230 a few weeks ago, and I think the high side was on the driver's side just a little further down the line from the low side (closer to the driver's side headlight). That's what it looked like at least. I wasn't too concerned about finding it, since I was only checking pressure and recharging on the low side. I did take the cap off just to check it out, and it was a larger diameter valve, which would obviously not fit with a low side measuring/recharge connector.
Last edited by C230 Sport Coup; 05-18-2009 at 04:40 PM.
05-18-2009, 04:39 PM
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05-18-2009, 05:31 PM
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'05 C230K SS
I did have a little confusion at first, because like I said, in my car (2005 C230), the high side valve was just a little further along the line (toward the front of the car) instead of on top of the radiator like that diagram shows. But thanks to those really smart automotive engineer guys, I quickly deduced that the high side was not the one I wanted because the high side valve is bigger (wider in diameter). The hose/gauge couldn't be connected to it. (In my defense, I did actually try the low side first, and it worked, but then I saw the cap for the high side, and I started to wonder if there were somehow TWO low side valves for some reason. The incompatibility of the connector to the second/high side valve confirmed it for me. I'm really smart, by the way.)
I assume that maybe they make them different sizes so that automotive ignoramuses like me don't severely frostbite, maim and/or kill ourselves by hooking up a highly pressurized can of 134a to the wrong valve. With a bigger valve, it's physically impossible no matter how inexperienced/stupid one might be. Believe me, I'm glad they seem to make certain things like this idiotproof.
05-18-2009, 05:34 PM
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'05 C230K SS
I'm jealous that you coined the term "measure thingy." That is definitely something I would normally come up with. Damn.
05-18-2009, 11:09 PM
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w203,ka7,e39
haha, thanks guys. found the valve!
oh and the "measure thingy" you refer to is prob the manifold guage.
the reading from the high side is to see if theres a clog at the expansion valve or not, and many other reasons. perhaps i will do a write up if i end up doing a recharge.
oh and the "measure thingy" you refer to is prob the manifold guage.
the reading from the high side is to see if theres a clog at the expansion valve or not, and many other reasons. perhaps i will do a write up if i end up doing a recharge.
08-08-2015, 07:09 PM
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chevy impala
