mikeonb4c wrote: My guess (but correct me if wrong) is that excess moisture should display either as spongy brakes (water boiling in region of cylinder) or as a moving part seizing up through corrosion. Neither is likely to happen suddenly and catastrophically so I can afford to take a personal view without endangering life and limb.
You get no warning whatsoever Mike and I'm talking from experience

Once the water boils, the steam can be compressed and you have NO brakes, just soiled underwear

Having said that, you do have to use the brakes hard to get it to happen - mine went when coming back downhill from Andorra in the Pyrenees and the engine braking wasn't sufficient by itself

Needless to say, I change my fluid every two years
