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Oil cooler fan for R1100RT


steve_ritter

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As summer is fast approaching in this southern part of the globe, I'm facing another year of watching the oil temp sit in the "uncomfortable warm" range! I've managed to find a fan and duct assy from a wrecked R1150RT(fits straight on to the cooler), and was wondering if anyone out there has wired one into a '96 RT, or if there are some links to wiring diagrams for the '96 RT? I was thinking of a relay and manual switch, or how is the R1150RT switched? Hopefuly a thermal switch which may be installed into my old beast? Any ideas???

 

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I'm not much help, but I am VERY interested in your project. I ride a '00 R1100RT and pegged my temp gauge twice last summer when I got stuck in heavy traffic due to major accidents on the highway. Does the 1150 fan and duct assy look like it will fit without too much modification? If so, I would hunt one down for myself. As far as wiring, I would just use a switch on the dash and connect it to a relay. I doubt the fan pulls very much current, but I'm still a big fan of relays. I figure you wouldn't need the extra cooling much, so I wouldn't go through the trouble of trying to rig up a thermal switch. Just my opinion. Let me know what you come up with.

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The standard R1150RT's don't come with the cooling fan but the R1150RTP's do. On the RTP's the fan is controled by the Motronic computer. I found the wiring diagram on an RTP website. I believe that I have it saved somewhere on this computer.

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Certainly does: just bolts straight in!I already had the upper fairing off, so access was not an issue... Just remove the old duct and bolt in the 1150 fan/duct. Just the wiring to sort out...

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I have a '99 RT and the guy I bought it from had one installed. They hooked it to the ABS switch on the dash. Out here in Phoenix I have used it a few times in summer 115+ in stopped or stop and go traffic. It helps out a lot by dropping it 2-3 bars on the display.

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Went with the suggestion of using a relay, even though the fan only draws under 3amps. I mounted a neat looking switch with a built-in on indication LED on the dash(just to remind me in my dumb-ass moments to turn the thing off), a relay in the fuse box and took power from the aux power fuse(I don't use the aux power sockets for any accessories). And yes, the fan drops the temp down 2-3 bars, keeping it well out of the 'uncomfortable' range on the RID. I am also using a semi-synthetic oil, so hopefuly the old beast should stay happy all summer!!! grin.gifclap.gif

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I purchased a used '99 R1100RT and the previous owner made a number of modifications, one of which was installation of an oil cooler fan operated by an AutoSwitch. I contacted him because of your question, and he told me the fan was an RTP unit purchased thru Bob's BMW in Maryland.

 

I only use it during stop & go traffic in hot Georgia summer weather (100 degrees F, 50-90% humidity) and have never gone above five bars on my oil temp display.

 

Sorry I don't have any further info, but certainly the site readership will know more about this device.

 

Rondo

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