Should 2012 kx450 waterpump look like this? Picture.

[hondaracer48]

Bike keeps blowing radiators like crazy and they are always bowed out like too much pressure. I had a 1.6 cap now I have 1.1 hoping that fixes it. Anyways idk if it's noticeable in the picture but my impeller teeth are kinda rough to the touch and inside of cover has some worn on it. Could my impeller have gotten stuck and not flow fluid? Also the left radiator is always the one to blow and it gets extremely hot withing like 15 seconds

[ericz103]

Bike keeps blowing radiators like crazy and they are always bowed out like too much pressure. I had a 1.6 cap now I have 1.1 hoping that fixes it. Anyways idk if it's noticeable in the picture but my impeller teeth are kinda rough to the touch and inside of cover has some worn on it. Could my impeller have gotten stuck and not flow fluid? Also the left radiator is always the one to blow and it gets extremely hot withing like 15 seconds

I think you have two issues going on. Your cap is the fail safe for the radiators building pressure. Regardless of the water pump condition you shouldn't blow radiators due to excess pressure.

 

But I agree it looks like your waterpump is rubbing. Bearings bad maybe? You could try and clean that one up, or I wouldn't think a new or aftermarket impeller would be that exspensive.

[ericz103]

I think you have two issues going on. Your cap is the fail safe for the radiators building pressure. Regardless of the water pump condition you shouldn't blow radiators due to excess pressure.

 

But I agree it looks like your waterpump is rubbing. Bearings bad maybe? You could try and clean that one up, or I wouldn't think a new or aftermarket impeller would be that exspensive.

Its weird that one radiator build pressure even if the pump was seized...doesn't it have crossover hoses?

[Confederate]

Water pump is toast. Cover is ruined also. Impeller to housing clearance is critical for proper water flow.

[hondaracer48]

Should the end of the impellar teeth be smooth or rough? I will order a new impellar, should this fix my issue with left radiator getting extremely hot which I'm guessing is causing the blowing of radiator?

I forgot to ask, how to I get impellar off? I tried loosening it but it just spins

[hondaracer48]

Help please? How do I get impellar off? Also, would a jammed impellar cause radiator on left to get so hot it burst? The top of the left radiator gets very very hot withing 30 seconds of starting. This is also the side that always blows

[MarioThePlumber]

Help please? How do I get impellar off? Also, would a jammed impellar cause radiator on left to get so hot it burst? The top of the left radiator gets very very hot withing 30 seconds of starting. This is also the side that always blows

You need to find a way to lock up the engine to get the impeller off.

Holding the rear brake while in gear will do just that.

[hondaracer48]

I keep blowing radiators and checked waterpump and the impellar fins are all scratched up. Anyways. I put bike in gear and held brake and the impellar just keeps spinning. I start bike and watch rsdiator with cap off and there is almost no flow

[Turboloader]

Inside your bikes side cover by the water pump sharing the same shaft, there should be a cog. and it should mesh up with other cogs. Pull your clutch side cover, and inspect it! the impeller should not move freely with out resistance from other cogs. also make sure its torqued to the impeller shaft to specs.

[WALKINGWOUNDED]

I keep blowing radiators and checked waterpump and the impellar fins are all scratched up. Anyways. I put bike in gear and held brake and the impellar just keeps spinning. I start bike and watch rsdiator with cap off and there is almost no flow

 

 

Do you mean with the bike setting on the stand, in gear with the engine off, and you foot on the brake, you can spin the impeller freely by hand?

[hondaracer48]

Ok I'm Goin to garage now to recheck because I did this with bike on stabd, dumb me I know. But either way the fluid is not circulating

[hondaracer48]

Ok, it spins but not freely in gear of stand. Feels like it should I'm guessing, so why am I not getting circulation?

[hondaracer48]

Old impellar teeth were torn up a Lil but and I keep flowing left side radiators so it seems like it's not circulating properly. Anyways. With bike on ground in gear I can wiggle impellar about a centimeter back and forth, then if I slowly kick it I can see it rotate, is this normal. Also why am I not seeing movement with cap of and bike running in neutral

[WALKINGWOUNDED]

Not familiar with Kawi, but the Honda Impeller threads onto the shaft, and can not be turned independently of that threaded shaft. 

 

It should only turn when the motor turns.

 

If you can turn it by hand without the engine turning, something is not right.

[hondaracer48]

I can only barely move it but other than that it only spins if I kick it

[WALKINGWOUNDED]

I thought this got moved to the Kawi forum.

 

If you can move it side to side, that is slack in the bearing.  That might cause a seal to leak and possibly mix water and oil together, but it won't stop the water from circulating.

 

It should move when the engine is moving.

 

Did you ever decide if the impeller will rotate independently from the engine? (it shouldn't)

[WALKINGWOUNDED]

When you say "barely move it", do you mean circular or side to side?

[WALKINGWOUNDED]

Sorry, not to nit pick with questions, but most of us will need very specific/concise details.

 

I tell my customers on a regular basis, fixing a car is easy, diagnosing can be the hard part; and the same can be said for bikes too.

[hondaracer48]

No I can't move it freely anymore. Still zero circulation in rsdiator fluid I really want to ride tomorrow. Engine ice be ok for one ride?

[LoonRider]

If coolant is not circulating it's not okay to ride it.