K11 Owners Group

slyderx · Posted: Mon Aug 09, 2010 6:53 pm Post subject: maybe not the fan....

its a 1992 k1100lt. it was standing for two years. the battery was not holding a charge when i tried to start it so the starter relay received the good news.i changed the oil,new battery and it runs as per normal but now the fan when it kicks in doesnt appear to be cooling the engine cos the warning light on the dash appears and there is serious gurgling noises from the cooling system. turning off the ignition stops the fan, the temperature guage appears to be erratic. I fear I may have damaged the motronic /fan control but that doesnt explain why the fan isnt cooling down the engine...i may as well change the coolant and consider the temperature sensor...but am i missing something?
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slyderx

K1100LT (1992)
ZRX1200R ( yummy)

Flying Duck · Posted: Mon Aug 09, 2010 7:53 pm Post subject:

There's two temp sensors:

One on the water pump that feeds the gauge.

Another one on the front of the head where the water exits. That one feeds the Motronic. If it's wire is chafed and shorting to ground then that will turn the fan and engine temp light on. Or it could be a flaky sensor.
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93 LT (x2)
94 RS
86-97 K75F(K75/100/1100 Frankenbrick)
86 K75C w/paralever, hi perf cams,TURBO!
91 & 92 K75Ss
91 K1
86 custom K100
14 WR250R
IBA #17739 (SS1K, BBG, 50CC)
Buy parts HERE

slyderx · Posted: Mon Aug 09, 2010 8:28 pm Post subject:

Jim · Posted: Mon Aug 09, 2010 9:35 pm Post subject:

slyderx - if you're hearing gurgling noises, the system might be low on coolant. Check the bottle (I think it's under the seat on that model), if it's empty or very low, you'll likely want to remove the gas tank and make sure the radiator is full.

If the bike was sitting for that long, and you don't know when the coolant was changed last, you might want to renew it.
_________________
Jim
1997 K1100LTSE 94,000 - still has gremlins!
1995 R100RT Classic 16,650 crashed - repaired!
1992 K75RTP 46,000

"We shall not all die, but we shall all be changed."

Flying Duck · Posted: Mon Aug 09, 2010 9:39 pm Post subject:

Check both the wires from the sensor and also the blue/yellow one from the Moronic to the relay. Either of those grounding would turn the fan on.
_________________
93 LT (x2)
94 RS
86-97 K75F(K75/100/1100 Frankenbrick)
86 K75C w/paralever, hi perf cams,TURBO!
91 & 92 K75Ss
91 K1
86 custom K100
14 WR250R
IBA #17739 (SS1K, BBG, 50CC)
Buy parts HERE

slyderx · Posted: Tue Aug 10, 2010 9:01 am Post subject:

Ted · Posted: Tue Aug 10, 2010 11:01 am Post subject:

Get a new radiator cap as well, it is a key part of the cooling system and they go bad every 5 or 6 years.
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Ted

KOG#1

Jim · Posted: Tue Aug 10, 2010 11:48 am Post subject:

I've never had the K at idle on the side stand. The oil disappears from the sight glass at idle on the center stand.
_________________
Jim
1997 K1100LTSE 94,000 - still has gremlins!
1995 R100RT Classic 16,650 crashed - repaired!
1992 K75RTP 46,000

"We shall not all die, but we shall all be changed."

slyderx · Posted: Tue Aug 10, 2010 12:06 pm Post subject:

doh meant mainstand anyway thanks for that..( there was a return of oil).i've decided to park that concern because draining and refilling the cooling system seem to have to have cured the overheating. Thanks everyone for responding to my dim and vague queries
_________________
slyderx

K1100LT (1992)
ZRX1200R ( yummy)

Flying Duck · Posted: Tue Aug 10, 2010 12:06 pm Post subject: