So my poor pathy wasn't taken care of by her last owners. Normal issues aside, I now have a pinhole leak in a metal pipe towards the back of the engine. It looks like it goes to the heater core, but I could be wrong. On several websites it's called pipe assy-heater feed (lookup number on the nissanpartsusa website is 14075n and the actual part number it lists is 1405388G00) should I just order the part myself and replace it? Or should a shop do it? Also can it be bypassed?