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 Topic: Coolant from water pump weep hole at start 







Dana

 
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Coolant from water pump weep hole at start

Dana » Wed Jul 09, 2025 10:16 am

Howdy from Tokyo!

I noticed if I don't run my MC28 for a while (few months) there *might* be a drop or two of coolant that drips from the water pump weep hole when I first crank it over.

I cannot get it to drip at any other point. Never drips while riding or after riding. Coolant level is solid.

I asked two local guys. The first said not to worry as pressure may build up from sitting and in temperature swings. Second guy said one drop is too many and could be a sign of seal failure.

The engine had a complete overhaul a few years ago with only a few thousand km's since.

What is the general view on a drip or two from the weep hole only on start up after a few months?

Dana
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2016 Husqvarna 701SM
2021 Husqvarna FS450 supermoto
1995 NSR250r MC28
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