It’s not an intercooler under the supercharger, it’s the oil cooler. There is a plastic pipe which runs behind the water pump directly back into the oil cooler. The pipe and its gaskets can leak, the oil cooler gasket can leak, the water pump can leak. The Y pipe and it’s other pipe that connects to it can leak, the small pipe that goes into the water pump can leak. The overflow pipe can leak. The reservoir can leak. And the manifold pipe behind the supercharger can leak. So, done right, it can be a pretty pricey job. The labor is not insignificant. There are some URO branded metal replacement pipes that are upgrades to the JLR plastic pipes.