it overheated! Need some expertise - Kawasaki KLR 650 Forum
1987 to 2007 Wrenching & Mods For maintaining, repair or modifications of Generation 1 KLR's. 2007 and earlier.

 
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post #1 of 5 Old 06-23-2010, 09:59 PM Thread Starter
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it overheated! Need some expertise

So, i was letting my bike idle in order to run some carb cleaner through it. So I left for at least five min and returned to find it still running but dripping coolant from the tail end and the temp redlining. I know I've blown the head gasket but has anybody been through this before? Like to share your advice
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post #2 of 5 Old 06-23-2010, 11:22 PM
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First thing you have to do is determine why it overheated in the first place. Thermostat, water pump, rad fan, coolant level......
What year of bike is it?

Lastly welcome to the forum. Wish your intro was in a different situation.

My Kaw Barn - 2004 KLR, 2006 Concours (sold), 1997 Bayou 400.

"It's a friggen motorcycle, it's not supposed to be comfortable, quiet or safe. The wind noise is supposed to hurt your ears, the seat should be hard and riding it should make you shit your pants every now and then. "

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post #3 of 5 Old 06-23-2010, 11:44 PM Thread Starter
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It's a 2007. Well theres no way find out what caused it to overheat NOW til we get her running. But I do know the fan was running...
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post #4 of 5 Old 06-24-2010, 10:38 AM
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Originally Posted by nathans 650 View Post
It's a 2007. Well theres no way find out what caused it to overheat NOW til we get her running. But I do know the fan was running...

Sitting at idle for "at least 5 minutes" is what caused it to overheat, needs air moving over the radiator to keep it cool. Was the header pipe red hot?

Are you sure the head gasket is blown? Is there oil in the radiator overflow? Water in the oil? Fill up the coolant and take it for a ride you'll know pretty quick, it will blow white smoke and overheat if the head gasket is bad.

Last edited by Spec; 06-24-2010 at 05:34 PM.
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post #5 of 5 Old 06-30-2010, 03:08 PM
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So you know that the fan is working, I would check the coolant level both in the radiator and in the overflow tank. It that looks OK, take off the water pump cover and check to make sure the impeller is attached to the shaft. If it's loose and the little 10mm nut needs to be tightened make sure to check and follow the torque specs. I broke that impeller shaft when I ignored that advice and torqued to much and the end snapped off. I can still feel that snapping off two years later.
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