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Date: Sat, 02 Apr 2005 16:59:49 +0100
From: Pooh Bear <>
Subject: Re: How to pin down source of water pump leak ?

Bob wrote: > 1997 NG900 2.0 turbo. > > I have a moderate (lose 1/2 liter/month) water leak from the pump or > the seal into the engine. It leaks enough that there will be a large > damp, not wet, spot on the driveway in the morning. I can see where it > drips down onto the oil filter area from above by looking at the > bottom of the engine. I can't see anything from the top as there is > little viewing room. > > I did change the pump last year and I did a very diligent job of > cleaning the iron block entrance with #400 sandpaper until it was > smooth and shiny again and carefully fitting the gasket to the pump, > etc (bearings went on last one). > > Any ideas on how to pin down the source? You can't see under the pump > from the bottom or the top. I suppose I could just change the pump > again, but if it is only the block ring gasket I could save a lot ' > of $'s. Of course, it's not a quick job and I really don't want to > do it twice more (i.e. change the block gasket and then have to do > the whole job over again to change the pump if it still leaks). I recently had the pump replaced on my 9000. Took longer than expected since access is tricky and the gasket didn't do its job right first time. If it's been working OK for some time it's just possible you've got another failure. I guess dismantling is the only simple way to be sure. Graham

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