cooling issues 203 vn1600 - Kawasaki Vulcan Forum : Vulcan Forums
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post #1 of 20 (permalink) Old 09-05-2012, 08:38 PM Thread Starter
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cooling issues 203 vn1600

right at 30000 miles no issues ever
but i started noticing the the fan was coming on more than usual especially when i was stopped

so i checked the coolant overflow tank was empty but when the bike cooled off it filled back up to the full line


water pump is working i have bled it no air in system


do you think the thermostat is bad?

thanks in advance
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post #2 of 20 (permalink) Old 09-06-2012, 07:44 AM
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If the fluid has been in there long enough to evaporate, change it out.

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post #3 of 20 (permalink) Old 09-06-2012, 10:18 PM
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so i checked the coolant overflow tank was empty but when the bike cooled off it filled back up to the full line


That is exactly the opposite of what it should be doing!
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post #4 of 20 (permalink) Old 09-07-2012, 06:14 AM Thread Starter
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That is exactly the opposite of what it should be doing!

that is what i though this weekend i will pull thermostat and flush system
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post #5 of 20 (permalink) Old 09-09-2012, 07:52 PM Thread Starter
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well i am officially confused

flush the system it was real clean

pulled thermostat it opened up at about 150- 170 degrees


filled her up

as she gets hotter it fills the over flow tank with hot coolant but when engine cools it sucks it back in

im at a loss
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post #6 of 20 (permalink) Old 09-09-2012, 08:11 PM
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as she gets hotter it fills the over flow tank with hot coolant but when engine cools it sucks it back in
This is how it should be...the opposite of what you stated above.
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post #7 of 20 (permalink) Old 09-09-2012, 08:21 PM Thread Starter
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i realize that but what is causing it to work backwards
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post #8 of 20 (permalink) Old 09-09-2012, 10:49 PM
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Now I am confused. In your first post you said that when the bike cooled off, the overflow tank filled up. In your second post, you said when it gets hotter, the tank fills....this is how it should be. Which one are you experiencing?
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post #9 of 20 (permalink) Old 09-10-2012, 11:39 AM Thread Starter
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Now I am confused. In your first post you said that when the bike cooled off, the overflow tank filled up. In your second post, you said when it gets hotter, the tank fills....this is how it should be. Which one are you experiencing?
I am sorry you are right

my first post was wrong

as the motor heats up it fills the over flow tank

when it cools it sucks in back in

I was told by a fella on another site it may be the radiator cap
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post #10 of 20 (permalink) Old 09-10-2012, 01:48 PM
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as the motor heats up it fills the over flow tank

when it cools it sucks in back in
The other fella is wrong.

Your cooling system is opertating as it should.
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