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'99 ML430 - Was unbolting the secondary air pump today to get some more access to part of the engine and noticed that a very small hose had snapped in two. It connects from the wire that connects from the secondary air pump into the underneath of the intake manifold just above the large nut pictured. Very small, thin hose. Crumbled into pieces when re-moving it completely. 20 years and 234k miles of heat I guess. Planning on going to dealership tomorrow, but if someone knows exactly what it is called or has a part #, that would be much appreciated. Thanks! Pictures and video attached.
I was up all last night figuring out this issue. The design of this small hose is that the top of the hose connects to a nipple on a wiring harness for the secondary air pump, whereas the bottom of the hose attaches underneath the front of the intake manifold. I've found someone who connected a male to male insert into the hole underneath the front of the manifold where it is flush and then connected the new hose and states that it runs fine, especially over 3500 rpm where this hose usually takes into effect. The question is just finding the male to male piece and the correct hose. Hopefully, I do not have to replace the intake man.
02-17-2021, 01:06 AM
