The pipes going to the rear heater core finally took a dump and started leaking anti-freeze. It's leaking near the heater core right behind the rear wheel. I have bypassed it up front, but am wondering if just leaving it this way will do any damage. I can't see how. I've also tried looking up this pipe to replace it, but can't find it in any parts books. Does anybody have a part number or a name of what this pipe is called. I have a 2002 Montero Ltd (full size).