smj999smj wrote:It could be any of a number of things. There are a few coolant hoses under the intake plenum that could leak. An external head gasket leak or an intake gasket leak could be an issue. A freeze out plug could be leaking. Only way to know is to get a look behind there or have it put on a lift so one can look from underneath to determine where the leak is coming from. A pressure tester could be helpful in finding the leak.