how to repair leak
Did you try radiator stop leak? Because my car was leaking antifreeze at the thermostat cover and i put radiator stop leak into the radiator and it completly fixed my leak. good luck!
Where is it leaking on the pipe, is it a metal pipe, is it a connection leak or a rust hole in the pipe. Stop leak is never a good idea, it can cause other issues, such as clogging heater core
Getting an online repair manuall for your specific model/year car can help you diagnos and fix the problem yourself. I use it frequently to fix my car. http://www.haynes.com/onlinerepairmanuals/mercury
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