Re: head gasket exchange / pressure relief valve?

Posted by RalfR on
URL: http://silk-motorcycles.221.s1.nabble.com/head-gasket-exchange-pressure-relief-valve-tp5002593p5002595.html

OK, than it is installed as it should be without pressure in the cooling circuit.
Many years ago I owned a Zündapp KS175 which uses the same "thermosyphon" cooling system without water pump. This cooling circuit had a pressure relief valve at 1,1 bar and also no cooling problems.
If water starts to boil the heat transfer decreases significantly due to the steam bubbles.

I filled up the system with a mixture of 60% decarbonized water and 40% glykol liquid from my Volvo car for aluminum engines. This should work to -20°C which we have 1 day in 20 years or so. The viscosity is comparable to clear water....

Short update: The new head gasket is leak tight. Still waiting for improved wheater to make the first test ride.....