Subject: Radiator Sock Arrangement on 4.5L

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Everyone with a 4.5L will know the importance of putting a sock into the radiator header tank to collect sludge. On my car the sock is pushed up into the header tank using a curved wire and held in place between the top rad hose and the radiator cast pipe by the upper jubilee clip securing the hose. I guess everyone is similar?

However, despite trying nylon socks and thin ladies pop socks, I have found it very difficult to overcome a small but annoying loss of coolant from where the sock is clamped between top casting and rubber hose.

Is this just the way I am fitting the sock arrangement, the wrong type of sock, or do others have this issue? Is there a way to overcome this or alternatively an engineering based solution that does away with the sock?

Suggestions gratefully received.

Thank you
Mark