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  #1  
Old 09-14-2017, 06:00 PM
viclava viclava is offline
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03 K1200RS running Temp question

I just acquired this bike with 71K and taken good care of. I noticed around town the engine temp wet up just below the red and the fan kicked on and then it dropped. At about 60 mph the temp was up over half.

Anytime the bike was around town with outside air temps at about 76 degrees, it seem to be high for other bikes I'm use to. Is this the normal range? The coolant is clean and appears to be good..

Any thoughts out there??

Scott
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  #2  
Old 09-14-2017, 06:04 PM
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Re: 03 K1200RS running Temp question

Scott:

Others will respond - yes it is normal. As long as the fan comes on and the temp goes back down all is good. And the temp being over the half mark - when I had my 2004 K1200GT it ran just over the half mark.
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Old 09-14-2017, 07:01 PM
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Re: 03 K1200RS running Temp question

Had my 02 for 8 years. That's normal and it'll go up while in the draft of a large truck.
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Old 09-14-2017, 07:08 PM
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Re: 03 K1200RS running Temp question

Your bike sounds likes it is acting within a normal range. Note that the brick motor bikes tend to run hot, and the cooling system can be taxed in traffic, particularly on hot days. You can do a search in the "tech" forum, here's one example of a thread discussing adding additional cooling fans, http://www.i-bmw.com/showthread.php?t=16709

Yet, with a bike with 71,000 miles might need to have its radiators cleaned - means taking them off the frame, and soaking them in warm water, to get the accumulated gunk in between the passages. Additionally new radiator hoses might be in order as rubber parts have a life span.

One other possibility is that the thermostat needs to be replaced, this has been discussed in the tech forum as well. Hope this helps.
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Old 09-14-2017, 07:52 PM
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Re: 03 K1200RS running Temp question

Yes sir, all normal!!! I had an 04RS did the same thing,
And as Matt has said, when you get behind a semi truck, don't matter if your doing 60 temp goes up too. All good!
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Old 09-14-2017, 09:15 PM
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Re: 03 K1200RS running Temp question

Yep, normal. But I've been thinking of taking out the face of the temp gauge and replacing the red zone with a "normal" marking!
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Old 09-14-2017, 11:36 PM
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Re: 03 K1200RS running Temp question

Quote:
Originally Posted by CJS350
Your bike sounds likes it is acting within a normal range. Note that the brick motor bikes tend to run hot, and the cooling system can be taxed in traffic, particularly on hot days. You can do a search in the "tech" forum, here's one example of a thread discussing adding additional cooling fans, http://www.i-bmw.com/showthread.php?t=16709

Yet, with a bike with 71,000 miles might need to have its radiators cleaned - means taking them off the frame, and soaking them in warm water, to get the accumulated gunk in between the passages. Additionally new radiator hoses might be in order as rubber parts have a life span.

One other possibility is that the thermostat needs to be replaced, this has been discussed in the tech forum as well. Hope this helps.

It's not that the engine runs hot it's that the gauge redlines where the fan comes on and makes everyone nervious. Agree a good washing out could help.
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Old 09-15-2017, 09:57 AM
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Re: 03 K1200RS running Temp question

Quote:
Originally Posted by jmtenthusiast
Yep, normal. But I've been thinking of taking out the face of the temp gauge and replacing the red zone with a "normal" marking!
I wonder if the guages are nitrogen filled like the speedometer & tach?
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  #9  
Old 09-15-2017, 06:39 PM
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Re: 03 K1200RS running Temp question

CJS is right on, removing the radiators and a good cleaning, mechanically get all junk out of fin spaces (couple hour job), clean with warm suds and now do a good spraying with brake cleaner or other good solvent and you will see a lot more gunk come out. I would rinse with water and suds again. Darn bike is an air breather, likes to live above 55 mph in clean air.
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  #10  
Old 09-15-2017, 06:56 PM
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Re: 03 K1200RS running Temp question

Don't really have to remove the rad's to clean. I used some bug/tar spray & soaked down from the front...let sit, soaked again, then used a pump sprayer & H20 and pressure washed/sprayed from the back. Did the same w/the oil cooler..worked great!

I also plan to use this on next service: https://www.engineice.com/
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Old 09-16-2017, 08:49 AM
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Re: 03 K1200RS running Temp question

Red pinstripe?point where the fans come on.Temp spec is in the manual.

[IMG]
2017-09-16_07-38-05 by Pierre Begin - Flickr2BBcode[/IMG]

And so is the temp spec where the light comes on.
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  #12  
Old 09-26-2017, 12:13 AM
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Re: 03 K1200RS running Temp question

Use a good name brand synthetic oil////I use 15/50 Mobil-1 with the Mobil-1 synthetic filter.....change it every 5000 miles.....so long as the fans work I do not worry
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Old 09-26-2017, 08:33 AM
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Re: 03 K1200RS running Temp question

Quote:
Originally Posted by viclava
... I noticed around town the engine temp wet up just below the red and the fan kicked on and then it dropped. At about 60 mph the temp was up over half. ....
This is Texas so ambient temps were probably in the 90s. In town the temp will go up, fan kicks in, temp goes down. As others have noted your bike is normal.
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Old 09-26-2017, 09:18 AM
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Re: 03 K1200RS running Temp question

90 mph at 90F? Needle shouldn't touch the mid-mark if cooling system is clean.

Pennsylvania-Ohio-Indiana-Illinois-Missouri and soon Nebraska at 70+mph.Not much 90 but some. Tires may melt before my old engine at them speeds in the heat.
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