Dear fellow KDXERS,
How much resistance should the water pump impeller have? How about the gear on the backside of the bearing?
When I tighten down the impeller nut to spec and the clutch cover removed, the impeller shaft is almost impossible to turn. When I turn the gear behind the bearing it either tightens up so tight it stops or if I go the other way the shaft unscrews from the impeller nut.
Did I install the water pump seal incorrectly? I did it months ago and forget exactly how I did it.
How can I confirm my water pump seal is installed correctly before I reassemble the rest of the engine?
WATER PUMP IMPELLER
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WATER PUMP IMPELLER
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- SS109
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Re: WATER PUMP IMPELLER
Hmm,I wonder what the problem is. It should turn fairly easy with the cover removed the engine.
Youtube Channel: WildAzzRacing
AZ State Parks & Trails OHV Ambassador - Trail Riders of Southern AZ
Current KDX: '98 KDX220
Old KDX: '90 KDX200 -White/Blue
'11 GasGas EC250R
AZ State Parks & Trails OHV Ambassador - Trail Riders of Southern AZ
Current KDX: '98 KDX220
Old KDX: '90 KDX200 -White/Blue
'11 GasGas EC250R
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- Posts: 60
- Joined: 11:17 am Feb 08 2022
- Country: United States
Re: WATER PUMP IMPELLER
Yeah I'm pretty sure I have it installed just like that diagram...I even followed the fellow KDXer who posted directions with all the pictures.
How easy would you say it should turn? I know it's subjective....but like I have to strain to spin it. Like if I flick it, the whole cover moves across the work bench before it spins. I estimate about 15 to 20lbs pound of force to spin it.
How easy would you say it should turn? I know it's subjective....but like I have to strain to spin it. Like if I flick it, the whole cover moves across the work bench before it spins. I estimate about 15 to 20lbs pound of force to spin it.
- Slick_Nick
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Re: WATER PUMP IMPELLER
Your water pump seal is not installed correctly. The impeller is bottoming out on the housing instead of using the spring's pressure to hold it against the impeller. Press it in until the metal lip is flush with the case. This is all laid out in your service manual, be careful on install, the mechanical seal is graphite and quite brittle if you press on it. You need to press the housing only. And dont forget the o-ring under the impeller! It doesn't appear in any parts diagrams, only the service manual.
'00 KDX 220R
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Re: WATER PUMP IMPELLER
Oh ok....guess I'll start over , thanks Slick Nick!
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Re: WATER PUMP IMPELLER
Update....Hey Slick Nick! Upon further inspection I discovered that the metal cup was not full seated down onto the step. So after some careful pounding, I got it in.
Thanks again!
Thanks again!
- SS109
- KDXRider.net
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Re: WATER PUMP IMPELLER
Glad you got it fixed!
Youtube Channel: WildAzzRacing
AZ State Parks & Trails OHV Ambassador - Trail Riders of Southern AZ
Current KDX: '98 KDX220
Old KDX: '90 KDX200 -White/Blue
'11 GasGas EC250R
AZ State Parks & Trails OHV Ambassador - Trail Riders of Southern AZ
Current KDX: '98 KDX220
Old KDX: '90 KDX200 -White/Blue
'11 GasGas EC250R