Newer crf issue

Meister
Posts
2495
Joined
3/21/2013
Location
Canton, OH US
5/12/2020 10:04am
A buddy of mine has a 17 or 18 450.

He was having the top end rebuilt as maintenance.

Now he's got a new problem and it keeps blowing the water pump seal. Any ideas?
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dmm698
Posts
912
Joined
6/24/2015
Location
NY US
5/12/2020 10:07am
excessive blow by from rings
or plugged crank case vent (or a combination of the two )
some kind of high pressure rad cap that is allowing the seal to go before it pops off relieving pressure (head gasket leak)
Paw Paw
Posts
679
Joined
12/24/2011
Location
Benton, LA US
5/13/2020 7:21am
Is the seal blowing or is it being installed backwards or is the bearing and shaft worn and need replacing?

Paw Paw
Meister
Posts
2495
Joined
3/21/2013
Location
Canton, OH US
5/13/2020 8:12am
I believe he said the seal was blowing.

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