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#46
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Dry enough to paint isn't dry enough for AC work.
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#47
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To change to a VOV you would be changing your entire system ... not fixing your system by any stretch of the imagination.... that is simply a totally different method of operation and all the things that go along with it ... electronics... would be different...
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1980 240d , chain elongation, cam marks reference: http://www.peachparts.com/shopforum/diesel-discussion/10414-help-i-need-check-stretch.html http://www.peachparts.com/shopforum/diesel-discussion/305365-9-degrees-chain-stretch.html evap fin cleaning: http://www.peachparts.com/shopforum/diesel-discussion/156207-photo-step-step-post-showing-w123-evaporator-removal-1983-240d-1982-300td.html?highlight=evaporator A/C thread http://www.peachparts.com/shopforum/diesel-discussion/297462-c-recommendations-mb-vehicles.html |
#48
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Quote:
all this needs to be in place in a CLEAN set of coils, and a working expansion valve.
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John HAUL AWAY, OR CRUSHED CARS!!! HELP ME keep the cars out of the crusher! A/C Thread "as I ride with my a/c on... I have fond memories of sweaty oily saturdays and spewing R12 into the air. THANKS for all you do! My drivers: 1987 190D 2.5Turbo 1987 190D 2.5Turbo 1987 190D 2.5-5SPEED!!! 1987 300TD 1987 300TD 1994GMC 2500 6.5Turbo truck... I had to put the ladder somewhere! |
#49
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Having too much oil or refrigerant will work your system to death in short order... not to mention not providing the cooling you deserve...
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1980 240d , chain elongation, cam marks reference: http://www.peachparts.com/shopforum/showthread.php?threadid=10414 http://www.peachparts.com/shopforum/diesel-discussion/305365-9-degrees-chain-stretch.html evap fin cleaning: http://www.peachparts.com/shopforum/diesel-discussion/156207-photo-step-step-post-showing-w123-evaporator-removal-1983-240d-1982-300td.html?highlight=evaporator A/C thread http://www.peachparts.com/shopforum/diesel-discussion/297462-c-recommendations-mb-vehicles.html |
#50
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The idiot that filled the thing didn't add oil to the system. He put the hydrocarbon in in it's liquid form. I think I"ll suck the system out and refill it properly... It's about 70 pounds on the low side. manufacturer says that 60 shoudl be max...
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All it takes for evil to prevail is for good men to stand by and do nothing. Too many people tip toe through life, never attempting or doing anything great, hoping to make it safely to death... Bob Proctor '95 S320 LWB '87 300SDL '04 E500 wagon 4matic Last edited by amosfella; 04-23-2011 at 06:42 PM. |
#51
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... 70 on the low side at what temp on the inside? what blower speed? windows up or down? fan in front of the condenser? what temp outside?
see the problem? there's no way to know from only one reading. 70psi... without knowing all the other symptoms. what RPM is the motor at?
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John HAUL AWAY, OR CRUSHED CARS!!! HELP ME keep the cars out of the crusher! A/C Thread "as I ride with my a/c on... I have fond memories of sweaty oily saturdays and spewing R12 into the air. THANKS for all you do! My drivers: 1987 190D 2.5Turbo 1987 190D 2.5Turbo 1987 190D 2.5-5SPEED!!! 1987 300TD 1987 300TD 1994GMC 2500 6.5Turbo truck... I had to put the ladder somewhere! |
#52
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4 degrees C at the coils according to the sensors. blower on max, windows up, condenser fan off, 12 C outside, idle, somewhere around 550-600.
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All it takes for evil to prevail is for good men to stand by and do nothing. Too many people tip toe through life, never attempting or doing anything great, hoping to make it safely to death... Bob Proctor '95 S320 LWB '87 300SDL '04 E500 wagon 4matic |
#53
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Windows are supposed to be DOWN..
you are not trying to cool the inside of your car.. you are trying to be sure the compressor and related stuff is working at its max....
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1980 240d , chain elongation, cam marks reference: http://www.peachparts.com/shopforum/showthread.php?threadid=10414 http://www.peachparts.com/shopforum/diesel-discussion/305365-9-degrees-chain-stretch.html evap fin cleaning: http://www.peachparts.com/shopforum/diesel-discussion/156207-photo-step-step-post-showing-w123-evaporator-removal-1983-240d-1982-300td.html?highlight=evaporator A/C thread http://www.peachparts.com/shopforum/diesel-discussion/297462-c-recommendations-mb-vehicles.html |
#54
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it's 53.6F outside, and you are trying to set pressures?
is the 4C at the output or input of the coils? the txv is going to be seriously regulating the flow with low ambient temps. pressure is going to be irrelevant
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John HAUL AWAY, OR CRUSHED CARS!!! HELP ME keep the cars out of the crusher! A/C Thread "as I ride with my a/c on... I have fond memories of sweaty oily saturdays and spewing R12 into the air. THANKS for all you do! My drivers: 1987 190D 2.5Turbo 1987 190D 2.5Turbo 1987 190D 2.5-5SPEED!!! 1987 300TD 1987 300TD 1994GMC 2500 6.5Turbo truck... I had to put the ladder somewhere! |
#56
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found the bugger! for anyone looking for the high side / high pressure, service port / fitting on a w210 e300, e320, e430, it's located behind the fan shrouding under a small cover the to the left of the driver's headlight. attached is a picture of the cover in question and my fancy label i made.
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#57
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SERIOUSLY???
wtf is MB thinking with that?!!! having both ports is sure helpful to working on a/c... of course, if some neophite hooked a can of freon to the high side they could easily kill themselves... I suppose it's to prevent that kind of thing...
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John HAUL AWAY, OR CRUSHED CARS!!! HELP ME keep the cars out of the crusher! A/C Thread "as I ride with my a/c on... I have fond memories of sweaty oily saturdays and spewing R12 into the air. THANKS for all you do! My drivers: 1987 190D 2.5Turbo 1987 190D 2.5Turbo 1987 190D 2.5-5SPEED!!! 1987 300TD 1987 300TD 1994GMC 2500 6.5Turbo truck... I had to put the ladder somewhere! |
#58
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Quote:
If not... you risk overfilling your system by adding oil .... because there is no way to know how much is already in there.....and too much oil can wreck your cooling capacity and perhaps other things in your system.....
__________________
1980 240d , chain elongation, cam marks reference: http://www.peachparts.com/shopforum/showthread.php?threadid=10414 http://www.peachparts.com/shopforum/diesel-discussion/305365-9-degrees-chain-stretch.html evap fin cleaning: http://www.peachparts.com/shopforum/diesel-discussion/156207-photo-step-step-post-showing-w123-evaporator-removal-1983-240d-1982-300td.html?highlight=evaporator A/C thread http://www.peachparts.com/shopforum/diesel-discussion/297462-c-recommendations-mb-vehicles.html |
#59
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Quote:
You need to do some reading before you do anything else... a couple of days at the least... I am just going to outline the problem areas you have already mentioned... 1. One hour under vacuum is not long enough to determine anything. 2. The proper test of a system is UNDER PRESSURE... which you did not mention... 3. If you stick that R12 into there ...what are you going to do when your less than effective leak test allows it to start leaking out ? The alternative is to legally use 4 oz of R22... which can be detected by a sniffer ..with pressure provided by either nitrogen or argon... totally legal to vent after the test... and that way you do not have the loss of the R12 or the cost of some shop recovering it for you. The oil is ' drained' by opening up the system and flushing with the proper fluid pushed by nitrogen or argon until the lines or items are clean... putting them back together with NYlog on the O rings at the joints.... and put the proper type and amount of cold flow oil Spread around the system ... As far as anyone knows that is the only way to know how much oil is in the system total.... and that is important... too much can kill your cooling .. too little fry the compressor... You can go to the site Aircondition.com and start reading... you will find that all the things I suggest are conform to industry standards and conservative safe procedures both in terms of legality and cost.... it is just that the ac system is a very harsh place inside... and little things ( like not having any moisture ) are very very important...and must be done according the physics applicable... Greg Ps, You have no way of knowing until you check for leaks whether your leak is on the low or high side.... they equalize out between times of compressor use... Anytime the system if opened up you need to replace the receiver - dryer.. it has moisture absorbing chemicals under the oil which , once filled up with moisture, can not be reconditioned ... thus new unit is needed... This is not the whole story.. just wanted to wave a red flag in terms of proceeding with regards to the information gathering you need to do...
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1980 240d , chain elongation, cam marks reference: http://www.peachparts.com/shopforum/showthread.php?threadid=10414 http://www.peachparts.com/shopforum/diesel-discussion/305365-9-degrees-chain-stretch.html evap fin cleaning: http://www.peachparts.com/shopforum/diesel-discussion/156207-photo-step-step-post-showing-w123-evaporator-removal-1983-240d-1982-300td.html?highlight=evaporator A/C thread http://www.peachparts.com/shopforum/diesel-discussion/297462-c-recommendations-mb-vehicles.html |
#60
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Indeed. Nobody says which fitting to undo, because you'll be disconnecting every one.
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