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Any oil loss during evacuation? 2 questions
I backconverted to R12 on my 260E (it was converted to r134 by PO) when I replaced the evap/exp/accum and it was working great for about 6months then it stopped....
I checked pressures and they were too low, so I got a leak somewhere. After some thinking, the only seal I did not replace during the R&R was the big rectangular seal at the compressor manifold (just forgot I guess?) Think thats the place it will be leaking from? I'm gonna charge it, add some UV dye and see if that is the location. ----> IF it IS....I'll need to disconnect and replace seal. 1) I shouldn't need to replace R/D in this scenario if I do it quick right? 2) Since it will be in open air and completely evacuated, do I need to add oil or does evac leave oil in the system? I'll be using a simple dual stage vac pump. Thanks guys
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2016 Monsoon Gray Audi Allroad - 21k 2008 Black Mercedes E350 4Matic Sport - 131k 2014 Jeep Wranger Unlimited Sahara - 62k 2003 Gray Mercedes ML350 - 122k |
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Did you replace the hoses?
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Jim |
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Much better to NOT use DYE...
put in R22 with nitrogen and use SNIFFER>.. DYE has potential for causing problems all by itself... and will not show you a leak in the evaporator for instance....
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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 |
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Quote:
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Jim |
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Jim, if you have a blow out and all the dye is lost from the evaporator.. .enough to run out of the drain tube... and you want to get under the car to find that... sure... but civilized people are usually going to be looking at a small leak.... which might be at the top of the evaporator... meaning little or no dye would come out... and a small leak can be sniffed at the vent easily with a sniffer and you dressed in clean clothes.....
And then there is the question of needing to get that dye out to make sure it will not cause problems itself... The chances that an evaporator leak will be big enough to show up dye out the drain tube is one in 47,936. So I am just playing the odds... and the residual physics too.. ( the contamination avoided by not using dye in the system in the first place )...
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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 |
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In talking with the young lady that was in the car it seems everything was fine and then they hear a hissing sound followed by a unique smell and it was obvious where to look.
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Jim |
#7
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After that description from her.... you put dye in ?
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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 |
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No sir, I offered to put dye in but before I did I figured I'd nose around a little with the uv light to see if anything was already there and it was. Somebody had already added dye. I take it cars don't come from the factory with it in them? What does dye do that is detrimental?
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Jim |
#9
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Has the potential for stopping up the TXvalve....and at some concentration messing with the pflow condensors....
Someone posted just in the last week about having added dye and it stopping the system pretty fast... bummer... Girl in a BMW... was she pretty ?
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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 |
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She is but it was her boyfriends car.
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Jim |
#11
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Answer
Quote:
.
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ASE Master Mechanic asemastermechanic@juno.com Prototype R&D/testing: Thermal & Aerodynamic System Engineering (TASE) Senior vehicle instrumentation technician. Noise Vibration and Harshness (NVH). Dynamometer. Heat exchanger durability. HV-A/C Climate Control. Vehicle build. Fleet Durability Technical Quality Auditor. Automotive Technical Writer 1985 300SD 1983 300D 1984 190D 2003 Volvo V70 2002 Honda Civic https://www.boldegoist.com/ |
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The rest of the system should be good though right? I'd really hate having to pull all hoses and flushing them again. That would be a real PIA. And to first post, no original hoses. I flushed them with solvent thoroughly during the backconversion.
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2016 Monsoon Gray Audi Allroad - 21k 2008 Black Mercedes E350 4Matic Sport - 131k 2014 Jeep Wranger Unlimited Sahara - 62k 2003 Gray Mercedes ML350 - 122k |
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ps2cho I would not rule out leaking hoses if they are the original hoses that came on the car.
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Jim |
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Would it leak at the crimped points?
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2016 Monsoon Gray Audi Allroad - 21k 2008 Black Mercedes E350 4Matic Sport - 131k 2014 Jeep Wranger Unlimited Sahara - 62k 2003 Gray Mercedes ML350 - 122k |
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That is where I have seen leakage from before.
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Jim |
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