Water pump issue - Honda Motorcycles - FireBlades.org
Honda CBR400RR Discuss the Honda CBR400RR in this section. This part of fireblades also covers the Honda CBR 250 and CBR 125.

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post #1 of 4 Old 04-21-2017, 10:29 AM Thread Starter
 
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Water pump issue

hi guys,

I have a 1991 Honda CBR 400 RR NC29 (L)
i recently got the radiator replaced and after that i noticed the coolant leaking from the water pump weephole.. but it does not leak all the time... is this normal if the water pump goes bad..?
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post #2 of 4 Old 04-21-2017, 10:38 AM
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Re: Water pump issue

Anything mechanical can go bad. If it is leaking out of the weep hole, then the pump is failing. It will only get worse and eventually you'll not have enough coolant to keep the motor cool and run the risk of motor damage.
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post #3 of 4 Old 04-21-2017, 11:53 AM
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Re: Water pump issue

Quote:
Originally Posted by Anojen View Post
hi guys,

I have a 1991 Honda CBR 400 RR NC29 (L)
i recently got the radiator replaced and after that i noticed the coolant leaking from the water pump weephole.. but it does not leak all the time... is this normal if the water pump goes bad..?
Hi, could be that the seals have gone, this could have been a reaction with the coolant if changing from IAT to OAT coolant, did you change the coolant yourself if so what was the colour coming out and what colour went in, further reading here
Antifreeze types iat, poat, hoat, nmoat. Recycled coolants.
http://www.flowkoolerwaterpumps.com/..._failures.html

Last edited by spagiratwink; 04-21-2017 at 12:08 PM.
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post #4 of 4 Old 04-22-2017, 11:40 PM
 
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Re: Water pump issue

Interesting...I never noticed weep hole(s) on my bikes before. I'll go look soon enough. But it explains why some tracks don't allow Glycol based fluids.

-2006 CBR1000RR- Jardine RT-1 CF, GP Shift rearsets, GP Suspensions 20mm revalve, Penske 8987 triple clicker
-2002 CBR600F4i (was mine and now hers)
Ohlins, Racetech, Showa custom Suspension

Because 12,000 RPM makes me feel better
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