The Stovebolt Site Forums The Shop Area Engine Shop radiator hose

I started my rebuilt 235 for the first time and the good news is it ran well. But when it warmed up the lower radiator hose blew off the water pump. what a mess! the water pump has no barb to hold the hose on. has any one had this problem and how did you fix it? for now I used weather strip adhesive. also need to buy better hoses than the ones I got from JC.

not clear how the suction side of the pump would "blow off" the hose, more likely to collapse that side - the water pump fittings don't really have barbs, at most just a bit of a ridge on the end, might be that you just didn't have the clamp tight enough? .... if the hose you got seems 'wimpy' it probably is one that should have a coiled wire inside, meant to prevent collapsing, not sure about 51, but the hoses with 'springs' inside were original some years - that might have been what happened, the hose collapsed and that let it come loose

Bill

Think you nailed it Bill. Some of the older hoses were a lot thicker and could stand the suction. This new crap we get from the vendors is much thinner. That said, even some of the older lower hoses came with the wire coil inside.
I've made several supports using piano (spring) wire from McMaster Carr. Don't remember exactly what size I used and without going out and looking I'd say about .050" dia. wire would do the trick. I pick a form about a 20% smaller than the inside diameter of the hose and wind it on the bench lathe. You could do the same thing in a drill press on the slowest speed.
Just my opinion, but I don’t believe there is any need for a sealer. In fact I‘ve seen Permatex #2 used and I thing it just make it more slippery and more of a chance of it sliding off. I just make sure I’m putting clean rubber on to clean cast iron and use a new hose clamp. Taint had one blow yet.
DG

Also, be sure the hose is the right size. It should have to stretch slightly as it slips over the water pump inlet. Trying to clamp a too-big hose tight enough so it doesn't slip off or leak is a difficult job.
Jerry