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#31
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I believe, and I'm sure the other ac experts (vstech, air&road and others) agree:
The 123 was designed for R12. Putting other than R12 in results in the following: - sub par cooling (I don't understand the exact physics but 134 can not move the heat as well as 12), and this leads to - damaged components (high side pressure spikes in hot weather beyond design limits) I have read several stories of people suddenly venting their refrigerant in traffic when a hose or pressure switch or compressor seal lets go. Besides being against the law and the green police, vented refrigerant is not good to breathe and I remember one guy getting the refrigerant and oil sucked in to the intake causing a temporary runaway condition. Just my 2c worth, I'm a believer in R12 after vstech fixed my ac the right way.
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The OM 642/722.9 powered family Still going strong 2014 ML350 Bluetec (wife's DD) 2013 E350 Bluetec (my DD) both my kids cars went to junkyard in 2023 2008 ML320 CDI (Older son’s DD) fatal transmission failure, water soaked/fried rear SAM, numerous other issues, just too far gone to save (165k miles) 2008 E320 Bluetec (Younger son's DD) injector failed open and diluted oil with diesel, spun main bearings (240k miles) 1998 E300DT sold to TimFreeh 1987 300TD sold to vstech |
#32
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I feel blessed to have my 134a converted 1982 300CD working great for at least 2 summers (the present one and the last) with very low vent temps (low 40's). I even have to turn the fan to low sometimes when I get too cold. It has been well over 100 degrees here in the desert of So. Cal. the past couple months. I think the trick is to have a completely clean system, and add the proper amount of refrigerant. On the coupe, I started with a good USED R4, and completely flushed the entire system with the good solvent. Checking for leaks is also critical. My A/C guy (has recycling/recharging equipment) has done many 'Benzs for me, and is getting good at them. I do all the mechanic work, and he just checks for leaks and recharges the systems for me (about $80 each car). I don't know why other folks are having so many problems with 134 conversions in their 123's, but mine seem to be working just fine. I need to use 134, as R12 is not very available here in CA (also very pricey!). So far, I have had great success. Wish my luck on my next job: 1984 300SD....Rich
__________________
All Diesel Fleet 1985 R107 300SLD TURBODIESEL 2005 E320 CDI (daily) LOTS of parts for sale! EGR block kit http://www.peachparts.com/shopforum/diesel-discussion/355250-sale-egr-delete-block-off-plate-kit.html 1985 CA emissions 617 owners- You Need This! Sanden style A/C Compressor Mounting Kit for your 616/ 617 For Sale + Install Inst. Sanden Instalation Guide (post 11): http://www.peachparts.com/shopforum/diesel-discussion/367883-sanden-retrofit-installation-guide.html |
#33
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wow, it's good to hear from someone that's had 134 successfully converted into a pre 84 123chassis!
keep in mind the cd has a smaller volume to cool, smaller windows, and fewer doors... likely you have the windows tinted and I bet the car is a light color. also, in the desert, you are not dealing with humidity... that's a HUGE heat load on a cooling system! 88F with 60% humidity is about 3 times the amount of heat as 100F in 10% humidity... that's a lot when often in TX or SC etc, it's 95+ with 90% humidity!!! these cars all pull in air from outside! so it's OUTSIDE humidity that is being dealt with! even with the max cool setting, there is a large % of outside air flowing through the car... Quote:
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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! |
#34
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Quote:
__________________
All Diesel Fleet 1985 R107 300SLD TURBODIESEL 2005 E320 CDI (daily) LOTS of parts for sale! EGR block kit http://www.peachparts.com/shopforum/diesel-discussion/355250-sale-egr-delete-block-off-plate-kit.html 1985 CA emissions 617 owners- You Need This! Sanden style A/C Compressor Mounting Kit for your 616/ 617 For Sale + Install Inst. Sanden Instalation Guide (post 11): http://www.peachparts.com/shopforum/diesel-discussion/367883-sanden-retrofit-installation-guide.html |
#35
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the 126 has fine cooling, I got good results with 134 in my 82 with stock condenser.
keep in mind the MASSIVE cleaning job I perform each year though. an 84+ condenser will help cool the car even better.
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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! |
#36
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Is the Compressorworks brand a remanufactured unit or new? I know I need to replace the compressor, but not sure which is the best one. I know I need to stay away from the Chinese copies, but what about Delphi? Chances are slim that I find a good used one like I did for my coupe. I have tried one from Kragen (now O'reileys), and it was junk right out of the box.
__________________
All Diesel Fleet 1985 R107 300SLD TURBODIESEL 2005 E320 CDI (daily) LOTS of parts for sale! EGR block kit http://www.peachparts.com/shopforum/diesel-discussion/355250-sale-egr-delete-block-off-plate-kit.html 1985 CA emissions 617 owners- You Need This! Sanden style A/C Compressor Mounting Kit for your 616/ 617 For Sale + Install Inst. Sanden Instalation Guide (post 11): http://www.peachparts.com/shopforum/diesel-discussion/367883-sanden-retrofit-installation-guide.html |
#37
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The one for the 123 is, as far as I can tell, a brand new build. I got mine from a chain auto parts store and they did not ask for a core.
I believe they purchased the design from Delco/Harrison and are building these in Dallas.
__________________
The OM 642/722.9 powered family Still going strong 2014 ML350 Bluetec (wife's DD) 2013 E350 Bluetec (my DD) both my kids cars went to junkyard in 2023 2008 ML320 CDI (Older son’s DD) fatal transmission failure, water soaked/fried rear SAM, numerous other issues, just too far gone to save (165k miles) 2008 E320 Bluetec (Younger son's DD) injector failed open and diluted oil with diesel, spun main bearings (240k miles) 1998 E300DT sold to TimFreeh 1987 300TD sold to vstech |
#38
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Quote:
__________________
All Diesel Fleet 1985 R107 300SLD TURBODIESEL 2005 E320 CDI (daily) LOTS of parts for sale! EGR block kit http://www.peachparts.com/shopforum/diesel-discussion/355250-sale-egr-delete-block-off-plate-kit.html 1985 CA emissions 617 owners- You Need This! Sanden style A/C Compressor Mounting Kit for your 616/ 617 For Sale + Install Inst. Sanden Instalation Guide (post 11): http://www.peachparts.com/shopforum/diesel-discussion/367883-sanden-retrofit-installation-guide.html |
#39
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Quote:
nahh. you can turn a new CW R4 by hand, but you have to be VERY stingy with the oil in it. if you put too much oil (more than an oz) and the oil will bind the pistons. I like to dribble a small amount of oil in, then turn it a few times, then dribble some more in, and turn it another few times. then let it spill out. and spin it some more. I've NEVER had a CW compressor give me problems turning by hand. (I'm pretty strong though... )
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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! |
#40
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Quote:
__________________
All Diesel Fleet 1985 R107 300SLD TURBODIESEL 2005 E320 CDI (daily) LOTS of parts for sale! EGR block kit http://www.peachparts.com/shopforum/diesel-discussion/355250-sale-egr-delete-block-off-plate-kit.html 1985 CA emissions 617 owners- You Need This! Sanden style A/C Compressor Mounting Kit for your 616/ 617 For Sale + Install Inst. Sanden Instalation Guide (post 11): http://www.peachparts.com/shopforum/diesel-discussion/367883-sanden-retrofit-installation-guide.html |
#41
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Quote:
It was a MOFO figuring mine out with the engine in the car...
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My occupational hazard bein' my occupation's just not around... 1980 300SD 1980 300SD |
#42
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Quote:
Mine was off a RX7 and appeared to be an aftermarket one with the "generic" bracket like the York adapter ones. It was already removed, so I couldn't see how it was mounted. I'm going to try to see if I can fab something up that will let me shoehorn it in, but I'm kind of doubtful. The subframe supports on the inner fender well on the R107, plus the UCA brackets make it very, very tight. I had to eliminate the R4 completely because there was no possible way it would fit. I think my only hope now is to somehow mount it solid, tight to the engine and then figure out how I can use a tensioner for the belt - probably something like what the one on the original 380SL used. The compressor was only $20 so I think it's worth playing with a bit. Unfortunately I don't have an extra engine, so I'm going to have to pull mine out sometime to do the experiment. I'll watch for your thread.
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#43
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I think someone suggested moving the PS pump down and placing the AC compressor in it's place. This would be workable on a 116, not sure about others...
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My occupational hazard bein' my occupation's just not around... 1980 300SD 1980 300SD |
#44
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Quote:
I will start another thread, and let this one continue....Rich
__________________
All Diesel Fleet 1985 R107 300SLD TURBODIESEL 2005 E320 CDI (daily) LOTS of parts for sale! EGR block kit http://www.peachparts.com/shopforum/diesel-discussion/355250-sale-egr-delete-block-off-plate-kit.html 1985 CA emissions 617 owners- You Need This! Sanden style A/C Compressor Mounting Kit for your 616/ 617 For Sale + Install Inst. Sanden Instalation Guide (post 11): http://www.peachparts.com/shopforum/diesel-discussion/367883-sanden-retrofit-installation-guide.html |
#45
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I, for one, would be interested in learning more about this strategy. Any pictures around on how this was done?
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