Engine Temperature gauge acting up - BMW Luxury Touring Community
 
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post #1 of 4 Old Sep 11th, 2011, 11:12 pm Thread Starter
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Engine Temperature gauge acting up

So, we are talking the gauge on the right hand side. 2000LT.
Something has gone a bit wonky, trouble is I can't remember how it behaved before exactly.

1. First symptom... gauge is now very active, jumping around quite a bit, nervous. Reminded me of those Smiths gauges on English cars from years ago... you have to look at them for a while and take a visual 'average'.
2. 2nd symptom... gauge stays on dead cold and then suddenly pops up to normal position (3/4 mark) when I accelerate hard, then drops immediately (instantly) to zero.
3. Everyday running is a mixture of 1 & 2.
4. No fans coming on. Temperature is in the 50-60'sF at the moment.

From memory...
a. Never had trouble with the temperature, fans will cut in properly when really hot (like in summer in the US when in traffic etc).
b. Previously, the needle of gauge did move reasonably fast, but it was definitely smooth, not jerky, and would be 'gliding' around the scale, not 'REM'ing it.

Any thoughts anyone?

Ralph
Located: Auckland, New Zealand...
but I left my biking heart along the Scenic Byways of America.....

"Come fill the cup that clears
Today of past regrets and future fears." ....Omar Khayyam
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post #2 of 4 Old Sep 12th, 2011, 7:30 am
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Re: Engine Temperature gauge acting up

I would suspect a loose (or corroded) connection. I have never been down inside to this level, so I have no further suggestions. Others with more wisdom will follow, I'm sure.
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post #3 of 4 Old Sep 12th, 2011, 11:44 am
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Talking Re: Engine Temperature gauge acting up

Are the radiators FULL? Overflow tank full. Sounds like air in the radiator to me meaning low fluid level and a leak somewhere.

Loose connection as mentioned above too.

Bad sending unit?


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Bought used K1200LT number 3. This one is green/teal with 31,369(now 7/29/2018 54,143) miles and is an '02. The first 2 bikes made it to near 150,000 miles.
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Due to heart health, the Dr says not to ride under 40 degree air temp. Ugh! Now it is harder to get my 18000 miles a year in just in the summer. Guess that stopped my 20 degree rides now.
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78 years young!
04 Honda Reflex.....Hers (it mostly sits)
Converted HD rider.
Love this LT bike and still waiting for my first speeding ticket. LOL
Vern
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post #4 of 4 Old Sep 12th, 2011, 8:18 pm
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Re: Engine Temperature gauge acting up

The temp sender that drives the gage has nothing to do with the fans so you may actually be in the normal range with a bad sender or gage. The sender is under the waterpump/oilpump at the right front of the engine. Easy enough to check for a loose connection. The fans are controlled by the ECU which is fed from a sender at the rear of the cylinder head behind the spark block.

John
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2005 K1200LT Ocean Blue Blue Wizard 110 K and counting...
2006 Bushtec Turbo+2 Spell
2004 330 Ci Convertable
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Have ridden a Motorcycle in all 48
But lack DE, MA, RI and CT with the 2005 LT

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