I recently picked up a 3Z497 with a 3Z493 pump (I think). I am in the process of refurbishing it. The picture is of the fitting on the intercooler pipe. It had a rubber o-ring as well. All the information I can find says it should be a compression fitting with a ferral. Does anyone know which is correct? And if it's this fitting with an o-ring, where can I find replacements for this fitting. Thanks, Thomas