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Newer MB 600 watt electrical fan in a m103
So I am close to having this project completed. I did a test to run the fan on the stock connectors and I need to beef everything up. I'm thinking of wiring it up on it's own circuit and just attaching it to the temp switch. Does anyone happen to have a wiring diagram for the fan for a w203 or I guess any of the models that have the Temic fan controller?
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1990 190E 3.0L |
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CENSORED due to not family friendly words |
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Not cheap but installation looks easy - https://www.amazon.com/Derale-16795-PWM-Fan-Controller/dp/B00N0N75TI
How about a simpler Volvo two-relay controller with low speed for AC (existing aux fan trigger) and high speed over a coolant setpoint? Is your alternator up for an extra 20 amps while idling? Sixto 98 E320s sedan and wagon 02 C320 wagon |
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Quote:
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1990 190E 3.0L |
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So just do that. It's not complicated.
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Quote:
Volvo 240 owners use the switch from a Saab 900, that's installed by cutting the upper coolant hose. Some Jaguar XJ owners use the same switch.
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1979 Black on Black, 300CD (sold), 1990 Black 300SE, Silver 1989 Volvo 780, 1988 300CE (vanished by the hands of a girlfriend), 1992 300CE (Rescue). |
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That specific fan isn't easy to control. It has 8 speeds and is controlled by a 3volt plusewidth signal. 10% PWM = off, 20% = first speed, 30% 2nd speed, ect until 90% =100 % fan speed.
I built this fan into a 124 fan shroud and use my PCS trans controller to provide the PWM signal v/s coolant temp. It works really, really well. The temp needle never uncovers the top of the 8 on the 80C marking. Buying a PWM standalone fan controller would be worth it to use the 600W fan. The viscous fan clutch setup on these cars is absolute crap.
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90 300TE 4-M Turbo 103, T3/T04E 50 trim T04B cover .60 AR Stage 3 turbine .63 AR A2W I/C, 40 LB/HR MS2E, 60-2 Direct Coil Control 3" Exh, AEM W/B O2 Underdrive Alt. and P/S Pulleys, Vented Rear Discs, .034 Booster. 3.07 diffs 1st Gear Start 90 300CE 104.980 Milled & ported head, 10.3:1 compression 197° intake cam w/20° advancer Tuned CIS ECU 4° ignition advance PCS TCM2000, built 722.6 600W networked suction fan Sportline sway bars V8 rear subframe, Quaife ATB 3.06 diff |
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Quote:
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1990 190E 3.0L |
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I am unsure if I can or if it would render the fan useless. Also, I need to figure out what I can wire it to. It has so much power I cooked a 12 gauge wire and had a 10 gauge smoldering on the negative side. I tested it with different fuses starting at 10 amps and worked my way up. It blew every fuse within a few seconds up to a massive 50 AMP fuse I had which seemed to do ok. So I think I may need to get a large 100 amp relay and some thick wires. I think the + and - wires on the fan are maybe 4 or 6 AWG
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1990 190E 3.0L |
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Grab the starter relay from an old Ford truck.
From what little I remember, p = i^2 r = v i. 600 Watts / 12V = 50 amps so your fuse experiment is right. Better get a 60 amp fuse in case the alternator can’t keep up on a hot day. Bulk quality wire is available from any MB with the battery in the trunk or under the rear seat. The W140 has a variety of lengths with terminals from the distribution center in the passenger footwell. Sixto 98 E320s sedan and wagon 02 C320 wagon |
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I've been wanting to do this for a while and have been researching the options. The following thread has some good info:
Monster electric cooling fan upgrade. long. w/photos. | Moparts Question and Answer | Moparts Forums And there has been a controller made for this fan: http://ma-uav.com/FanControllerv3.html. The discussion about the controller: http://board.moparts.org/ubbthreads/ubbthreads.php/topics/1128594/1.html
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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 |
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Quote:
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1990 190E 3.0L |
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I may be the first person that has fitted the newer my fan to a m103 engine. I will post pictures later.
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1990 190E 3.0L |
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Another iteration of the electric fan install on your 190E? I'm also still working on increasing cooling capacity, adding an oil cooler (stock 190D 2.5/300D 2.5) and trans cooler (Sienna) on my mom's car before I figure out something for mine.
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Current: 1975 450SEL, 83 300D, 88 Yugo GVX, 90 300D OM603 swap, 91 F150 4.6 4v swap, 93 190E Sportline LE 3.0L M104 swap, 93 190E Sportline LE Megasquirt, 03 Sprinter, 06 E500 4Matic wagon. |
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Yes, but this time I was able to get the real deal. 600 watt MB from a w203.
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1990 190E 3.0L |
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