I have a coolant leak back side of head, behind turbo and exhaust. I've been under it and can only see a metal tube, maybe 1- 1 1/2" diameter running across to what look like a hose, wet at hose. But for all the wiggling around I can not see where it goes. Any ideas? Almost figure have to drop motor or pull head to get to it. Our trade for newer model. Only 178K on odometer.

Thanks

Mark