Opinion rubber water cooling jacket?

[1945dave]

How good are the rubber cooling jackets designed to generically fit 36mm and 40mm motors? They look kind of geeky but are they effective?

Dave

[Fluid]

They leak sooner or later. Get a metal jacket.





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[JIM MARCUM]

They leak sooner or later. Get a metal jacket.





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JIM

[siberianhusky]

I've only seen a couple but they were much narrower than the aluminum versions, less water in contact with the motor. I've never used one myself, heard too much about them leaking.
After seeing how much pressure was needed to replicate a cooling leak problem I had earlier this year I wouldn't trust one personally. Other people have had cooling lines blow off nipples under running pressure.

[1945dave]

Thanks for you input. I certainly believe a precision machined aluminum cooling chamber is superior as well. Yet, around here I have seen several of these recently and the remark about leaking has not come up by the actual users. Regarding pressure from the water flow I believe I replied to your thread with actual numbers, it is not all that great at speeds around 50 mph. If you are into record saw speeds the pressures are extremely high. I kinda wonder how much the heat sink factor plays in this choice. Certainly a rubber or silicon chamber offers little or no heat transfer of its own.

Thanks