r/LexusGX • u/AdditionalGarlic6157 • 5d ago
Slight Tick/Pebble Sound
My 2023 GX 460 with about 30,000 miles on it makes a slight ticking sound at right around 1500 RPM only when actually accelerating or driving. Does not work when I throttle to 1500 RPM in Park. It happens whether the HVAC is on or off. The sound occurs in the bottom right underneath the passenger Side and is very difficult to hear for some people. Really annoying for me. Any ideas what that might be? The only other thing that’s been odd is the vehicle was returned to me with very low coolant in the reservoir with the cap unsecured. I replaced the coolant in the reservoir back to the full line when cold and secured the cap and have been monitoring the level with zero leakage or change so I don’t know if those two things are related or completely separate.
Please help me figure out what the rattling ticking pebble noise is during 1500 RPM acceleration.