Hey guys I’m stumped diagnosing and engine noise. From 17-1800 rpm up to 2400 rpm I get a noise I can describe best as varying pitch ( goes higher with idle) and it’s very much like the sound a length of hose makes when you swing it in a circle. Like a musical whistle almost ? It sounds like it’s coming from under the intake manifold or from the front of the motor. The truck has full power. Not sure if it’s a vacuum leak, or maybe the water pump bearing? Hoping someone has experienced the same thing and can point me in the right direction. Any help is appreciated!
(Side note, would a timing belt make a noise akin to that? One of the bearing in there? It’s quiet at idle no noise. Only happens under increasing engine speed)
(Side note, would a timing belt make a noise akin to that? One of the bearing in there? It’s quiet at idle no noise. Only happens under increasing engine speed)