I have a 2006 Ford Escape 3.0 engine. I have a coolant leak in from the coolant bypass hose part number 8548 (actually a plastic bypass). The bypass connects the coolant channels of the two cylinder heads. Ford list an o-ring for the right bank attachment of the bypass hose but nothing for the left bank. To get the left bank o-ring you have to buy the $135 assembly. The o-ring has a oval shaped cross section so I can't use a standard o-ring. Has anyone incurred this problem and have a solution? Thanks