This is getting louder and defying troubleshooting. Other than this constant noise and pitch, truck drives and shifts beautifully. Squeak disappears when I lift the front! Only on passenger side too. Checked so far:

• Belts
• Pulleys
• Tensioner
• Alternator
• Sway bar bushings
• Torsion Bar
• Control Arm
• Steering rack

I’m sure any w163 could have this. Thanks for any advice!

 

Your suv is not in motion, so it has to be originating from the engine and it's components running.
try here - https://mycarmakesnoise.com/

 

Thanks. The only noise that sounds close is the water pump. But my temps are right on regular, no drips of anything let alone water and the noise squeaks when I slam the passenger front door. Shaking the vehicle from roof rack sideways, or bouncing while standing on passenger door sill, pressing up/ down on the hood produces nothing! 😂

 

I had a perfectly normally running car, but water pump was replaced as part of regular maintenance....what shocked me is how jammed up the old pump was....I bet, the bearings were shot on it....it puts unnecessary load on the S-belt and the engine...just because car appears to run normally does not mean periodic wear and tear items aren't in need of replacement...

 

Problem solved!! Those damn heat shields under the passenger fender liner. Rubbing each other and occasionally touching the exhaust. Done!

Thanks for your help 👍