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  #1  
Old 07-31-2007, 06:39 PM
wFo250's Avatar
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Default No Flow?

     

Ko, I sold my '00 KX250 to my buddy, fresh complete rebuild.
PROBLEM IS when we poured the coolant into the rad, it wont suck it down!
Anybody know why this might be happening? The coolant does not appear to be flowing,
and the engine gets hot quickly.We took it back apart, and the impeller spins when kicked
over, and I blew in the line and it's unobstructed. Is there more to the pump
that I don't get>? I figure if the impeller is spinning, that's all you need to
move the fluid through.
Thanks in advance
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  #2  
Old 08-01-2007, 10:12 AM
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Default Re: No Flow?

If you had a manual, it would tell you whether or not there was a screw that you need to use as an airbleed. That is pretty extreme that it won't circulate at all though. Many of us wouldn't have started it knowing that.
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Old 08-01-2007, 10:17 AM
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Default Re: No Flow?

It sounds like you may have a huge air bubble or you may have the incorrect head gasket that's blocking a passage or one of the coolant passages is so corroded up that coolant isn't flowing.
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Old 08-01-2007, 11:08 AM
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Default Re: No Flow?

On these bikes there are 2 coolant dran plugs 1) on the water pump cover and 2) on the cylinder itself above the water pump half way up the cyinder. Take the hose off at the pump(frt hose) that comes from the right radiator and plug it so no water runs out. Take one plug out at a time and fill tap water through the fill hole until clean water comes out the drian plugs. If water runs out you know there is not a blockage in the head or cylinder.

The other thing is make sure the impeller nut is tightened properly to the shaft as it could slip if not tight.

Good Luck
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Old 08-01-2007, 12:04 PM
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Default Re: No Flow?

I will just bet they had been wondering what those were.
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Old 08-01-2007, 12:13 PM
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Default Re: No Flow?

Quote:
Originally Posted by ossagp1 View Post
I will just bet they had been wondering what those were.
Oh Ossag..just trying to help
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Old 08-01-2007, 12:17 PM
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Default Re: No Flow?

You did a good job.
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Old 08-01-2007, 12:24 PM
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Default Re: No Flow?

Quote:
Originally Posted by ossagp1 View Post
You did a good job.
Seems I am never quite sure if your rippin on me Ossage-Doesn't
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Old 08-01-2007, 12:30 PM
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Default Re: No Flow?

I wasn't ripping on you.
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Old 08-01-2007, 12:32 PM
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Default Re: No Flow?

I know you weren't we have went through this before so I thought it was funny.
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Old 08-01-2007, 12:37 PM
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Default Re: No Flow?

I like reading thoughtfull responses, even if I like to do something different.
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Old 08-01-2007, 10:35 PM
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Default Re: No Flow?

Thanks for the responses.
Bill, I still have my '01KX
The nut and impeller was in place, and I know it spins when kicked over.
I disconnected the hoses from the pump cover and blew air through, and the passage seems unobstructed, but I will try the plugs (I knew where ONE of them was)

Thanks again

--John
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Old 08-02-2007, 06:58 AM
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Default Re: No Flow?

Quote:
Originally Posted by dhighlan View Post
Seems I am never quite sure if your rippin on me Ossage-Doesn't
Alot of people feel that way! But trust me...Ive been around here long enough to see that if Ossa rips on you...youll know it!
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