"tango4" wrote in message ...
The dump valve on my Nimbus 3 are leaking - one leaks about 10 litres
overnight, another 10 litres an minute, the others somewhere in between.
I'm looking for help on how to go about sealing them better.

I will get some new springs manufactured to push the valves closed but I
would appreciate help on how to renew / refurbish or repair the existing
seals themselves.

Tkx
Ian

For me it works excellent to just smear some vaseline between the seat
and the valve. After that I use the schemmp-hirth tailplane mounting
tool to firmly pull the valve against the seat (there is a 6mm
threaded hole in bottom of the valves which I believe is there exactly
for this reason).

Regards
/ Jan Larsson
Mini Nimbus C #121
Sweden