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  #1  
Old 11-07-2013, 07:58 PM
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Default leaking coolant out of weep hole

have an 08 yz450f sometimes on start up it leaks coolant out of the weep hole.. usually means the water pump seal is gone but it only does it sometimes and then stops when the bike warms up.. last time i started it, it didnt do it at all.. anyone know why it would do this ? water pump seal on its way out maybe ?
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Old 11-07-2013, 09:01 PM
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Yes early warning sign......
Change out the seals and shaft if it's grooved!!!
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Old 11-08-2013, 05:15 AM
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Quote:
Originally Posted by stevo450 View Post
Yes early warning sign......
Change out the seals and shaft if it's grooved!!!
Check the bearings also. Worn bearings will cause the seal to leak.
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Old 11-08-2013, 05:19 AM
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Sorry forgot to mention that too...
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Old 11-08-2013, 08:34 AM
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It probably stops leaking when warmed up because the seal is expanding from the heat. Don't think that you have time. This is your ONE and ONLY warning. If you let it go too long, you will have coolant in your gearbox and ruin your clutch.
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Old 11-08-2013, 08:53 AM
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'a stitch in time saves nine'

---------- Post added at 02:23 AM ---------- Previous post was at 02:22 AM ----------

It doesn't quite rhyme but...
'a repair right now saves a whole lot of cash later'
Randog Leader likes this.
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Old 11-08-2013, 09:57 AM
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You may need a blind bearing puller to get those water pump bearings out. If you purchase or rent one, be sure to get the metric set that goes all the way down to 8mm.
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Old 11-08-2013, 10:05 AM
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^YES!!!
However... Depending on the construction you may be able to sweat the bearing out (?) haven't true it with that application as I have a blind bearing pulled set....
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Old 11-09-2013, 03:26 AM
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did the pump seals and bearings on my old yz125 and didnt need any special tool to get it out... would it be different or ?
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Old 11-09-2013, 03:40 AM
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Perhaps

---------- Post added at 09:10 PM ---------- Previous post was at 09:09 PM ----------

Don't over think the special tools..... You can in most cases get around them...if you lived near you could just use my bearing puller...
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Old 11-09-2013, 08:44 PM
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Quote:
Originally Posted by stevo450 View Post
Perhaps

---------- Post added at 09:10 PM ---------- Previous post was at 09:09 PM ----------

Don't over think the special tools..... You can in most cases get around them...if you lived near you could just use my bearing puller...
ill give it a suss.. hopefully my old work will let me use theirs if i need one
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