I'm gathering parts to replace the hoses, tower and water pump on my 2003 XK8. I was inspecting and listing parts recently to set up an order and found that there is a ~1" diameter hose that runs from the tower at the front of the engine, under the intake manifold to the rear of the engine. Is this what is know as the "valley hose" and does anyone have a part number? To facilitate the replacement of this hose, is it necessary to remove the intake manifold?
Advice would be appreciated.

 

Bob, there are 2 hoses under the intake, Valley Hoses. Almost impossible to replace w/o removing the intake. The tower and hoses are not too difficult with the intake removed. Need a gasket set and T.B gasket since the TB may need to be removed also. There may be a plastic connector that joins the valley hose to the Octopus hose that also get brittle. The tower should have either Torx or Hex bolts attaching it. The Hex are 8mm or 5/16" (same wench) Crowfoot may help on rear but with intake off, no worry.

 

Hose part# AJ8326 and NNE3946CA

 

Thanks for your guidance. You use the term "TB", what is this an abbreviation for?

 

Throttle Body.