Hi, this is my 1st post after finding this site and hopefully i have come to the right place for help,,I have a '99 model AU auto Forte and i have sprung a leak in my Heater return tube, just under the exhaust manifold,, now not being familiar on where this heater return tube actually goes i was wondering if anyone can point me the right direction to see some sort of illustration on where it goes and how it is connected