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#1
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Replacing engine driven fan with electric for better AC
Has anyone replaced the engine driven fan on a w126 with an electric puller fan to increase AC performance?
The AC on my 89 300SE was converted to r134a before I bought it. I've further converted to Dura Cool refrigerant which improved it, keeping me nice and cool as long as I'm at highway speeds, but it still struggles to keep the interior really cool when the outside temperature is above 85 and I'm in stop and go traffic. I'm tempted to try it, I just wondered if anyone has any experience with such a conversion and if it did improve AC performance in stop and go traffic. Thanks.
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2000 Mercedes S500 1990 Mercedes 560SEL 1970 Triumph Spitfire |
#2
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There already is an electric fan for the A/C condensor, mounted directly on the condensor, which would be more effective than one mounted to the radiator side.
The engine-driven fan is primarily for cooling the engine radiator.
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Gone to the dark side - Jeff |
#3
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I replaced both the the clutch fan and aux fan with a single electric puller fan from a 90s volvo. The AC is must more efficient especially during stop and go driving in very hot weather. The stock aux fan is worthless. I also use Duracool. If there is enough room between the M103 engine and your radiator, I recommend this fan.
http://190rev.net/forums/showthread.php?t=34975
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CENSORED due to not family friendly words |
#4
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On my 300E, I bridged the terminals of the temperature sensor connector and got the aux fan to run at high speed. I made a significant difference to the A/C performance and also helped keep the engine temperature down around 85deg.
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1986 300E (3/2002) Rear ended and totaled (10/2009) 2000 Xterra (5/2000) 1992 400E (11/2009) -Sold 1986 300E (12/2009) - Sold 2004 E500 Wagon (6/2013) - Sold |
#5
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Quote:
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2000 Mercedes S500 1990 Mercedes 560SEL 1970 Triumph Spitfire |
#6
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I don't remember exactly because this was more than a year ago. I filled it up through the low side port above the driver's side fender (on a 190e) with a R134 adapter and hose/gauge. The gauge had numbers on it but it was split up into a green, yellow and red section. I filled it up right up to the line between the green and yellow section. I think thats around 40psi.
This is actually similar to what I did on my 2.6 which has 2 side by side auxiliary fans which are much more powerful than single aux fan on the 2.3. If the 300se has a similar 2 aux fan setup, I would give the switch idea a try first.
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CENSORED due to not family friendly words |
#7
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I wonder if the wiring on that circuit is sized adequately to have the fan running constantly?
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1988 California version 260E (W124) Anthracite Grey/Palomino Owned since new and still going strong and smooth MBCA member Past Mercedes-Benz: 1986 190E Baby Benz 1967 230 Inherited from mom when she downsized 1959 220S Introduced me to the joys of keepin' 'em goin' There are only 10 kinds of people in the world--those who understand binary and those who don't |
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