N62 Engine Knock/Rattle

[Toothbrush]

Originally Posted by Nanniepoo

Is #5 easy to replace? Also where does the lower branch of #1 go?

Easy is subjective. If you have the Intake Manifold off, it's right there and can be replaced in a few seconds. Otherwise, it's still easy, if you don't mind working in very tight spaces. #5 runs under the throttle body, but I changed it with only the plastic air ducts, filter box, and "rubber boot with resonator" removed, some long nose pliers, long screw drivers (to loosen the old clamps) and a lot of patience. One of the first parts I replaced when I bought mine.

All of #1, the upper radiator hose, can be seen if you just peer into the engine bay. It's a large hose right up front and easy to replace/follow with your eyes.

Just beware, if you replace #1, youwill most likely have to replace #5 as well because there is a nipple that connects the two which will fall apart and crumble if that hose is original/old. You might can clean it all out of the smaller Y hose, but why chance it?

Also, #5 has three single-use factory clips, which you'll need if you change that hose out. Or, just one if you go with just the larger upper radiator hose.