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Originally Posted by Hatterasguy
Just tighten it don't go nuts. No one torques hose clamps. Sometimes they will leak when it gets cold, just snug the clamp up a bit more.
After a few heat cycles usually you need to cut the hose to get it off anyway.
One school of thought is to dump the MB hose clamps and use wider generic clamps on the radiator. I buy into this and have done so, makes sense wider band distributes the load better.
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I agree with Hatterasguy. Replace poorly engineered clamps with the wider stainless screw clamps. The wider clamps put more surface area contact with the coolant conduit, be it radiator, block, etc. As said, it so easy to over tighten hose clamps. Breaking the neck on the radiator is only one of the dangers. The other danger is cutting through the hose. I always make sure the coolant conduit is clean with no "bumpy" deposits which make it more difficult to get a good seal. Also, keeping the edge of the clamp about 1/8" to 1/4" from the sealing rib is optimal, in my opinion.