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| Fitting A Manual Engine Fan Switch? | |
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| Tweet Topic Started: Mon May 26, 2008 10:08 pm (946 Views) | |
| quenching | Mon May 26, 2008 10:08 pm Post #1 |
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Just got myself a 1992 2.0e Auto with 157k miles on the clock. Engine temp is around 80 on the motorway but in traffic it went up to about 110. Switching the heaters on full blast seemed drop the temp to just under 100 but still to high for my liking. Having read many topics here on overheating I believe I need a new fan thermostat switch (I'll get that done while servicing next week), but I've also seen mention of fitting a switch to the dash that I can manually turn on myself. Seems like a good idea (I've had a BMW 5 series explode and I'm not keen to have it happen again!), but I'm not sure how to do it. Anyone point me to a "how to" or advise on doing a professional looking job |
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| frank133 | Mon May 26, 2008 10:22 pm Post #2 |
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frank133
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Hi mate its pretty easy,the fan sensor is on the head ,easy to check pull the plug,and wirh the ignition on bridge the wires in the plug ,the fan will click in if you have the correct plug, just connect two wires to the sensor wires and run them to a switch inside the car,you then have the option of overiding the fan sensor without disconnecting it. You can also wire in a led to show you the fan is engaged,thats what I did,but I tend to over engineer everything I do, |
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| quenching | Tue May 27, 2008 7:42 am Post #3 |
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Thanks Frank, where did you put the switch inside the car? Is it easy to get to any of the blanks in the dash over the heater vents or is there a simpler solution, I'd rather not start hacking holes in the dash if I can help it. Q |
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| Mark216T | Tue May 27, 2008 10:36 am Post #4 |
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Rest In Peace, Mark. You Will Always Be Missed
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I often rewire an unused switch so it appears OEM For the CRX's we use the rear wiper as they are often removed for racing. In Eddies case the rear washer becomes an intecooler spray and the rear wiper triggers the fan override. Just find a similar unused system/optional extra in your 190 Mark |
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| Neil | Tue May 27, 2008 10:57 am Post #5 |
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Newbie
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There are usually a couple of blank switch spaces in the triangular panel above the Centre Air Vents. Chances are that there isn't an MB switch with a Fan icon on (unless A/C-equipped cars have one?), but a Rear Interior Light or Rear Demister switch will have the action you're looking for, I think. |
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| Bedaida | Tue Jun 19, 2012 12:32 pm Post #6 |
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Hi mate, sorry to bring this up! I really want to set up the same thing, I will explain why: my 190e just started overheating in slow traffic, which I thought was because of the fan not working. I know this cuz it does not heat up on the motor way... Now.. the mechanic has given the biggest shock of my life, by telling that I got a blown head gasket!! I seriously doubt that. I think if I get the fan to work, I won't have the problem!! Would you be so kind to post a picture to explain how to bridge the connections?? I would be sooo grateful No worries if its too much ![]() Kind regards |
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| Gerry Lloyd | Thu Jun 21, 2012 1:57 pm Post #7 |
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Monsieur
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I stole a switch off a broken coffee filter and its plastic surround happened to fit in the ugly hole where a radio used to be. One thing I'd say is the system is quite finely tuned for economy and that's why they opted to have a fan that only kicks in when it's needed. As a result, you might hear a strange noise when idling in Drive if you force the fan on: it's a sort of chugging that goes away if you slip into neutral or turn the fan off again; has something to do with the alternator being under load. As a result, in the cool weather I hardly turn on the fan at all but you might have to if you use congested roads daily. |
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| Gerry Lloyd | Mon Jun 25, 2012 9:05 pm Post #8 |
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Monsieur
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Green arrow points to the thermo-switch. http://s19.postimage.org/60vobj9pf/DSC00085_Small.jpg Edited by Gerry Lloyd, Mon Jun 25, 2012 9:19 pm.
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8:35 PM Jul 11