There used to be something available called a cool clamp...but I think it was spelled wrong...Kool Klamp?? Kool clamp??...something like that.

Anyhow, it was a small jacket that wrapped around the head of an aircraft engine that allowed cooling water to cool the engine. I used one on my small rigger for awhile...using an OS .10 FSR aircraft engine in it.

I don't see why the coils would not work, but I don't think they will have the contact area of the kool clamp (see pic).

Sean