Knocking/Scratching Noise (with video!)

[keith204]

A few weeks ago my Yaris started making a knocking (maybe scratching) noise. It's becoming way more consistent and way more pronounced. Now I'm nervous (ok embarrassed) to drive it.

Does this sound familiar to anyone?

https://youtu.be/8NqYlSJ6550

[IllusionX]

The noise changes with the throttle right? Could be the water pump

Sent from my ONE A2005 using Tapatalk

[tmontague]

Without hearing th noise I can almost guarantee it's the water pump. The noise should match the Rev changes. Just sit your car idle and have someone push the accelerator a few times, the noise should change with it.

When my Echo's wp went at 310,000km a it did was make a brutal warble like scratching noise. No leaking a all. I changed it because the last think I need is the bearing and other metal pieces to disintegrate into the cooling system. Ever since the change i've had no issue an it's been over 50,000km since the change

[Kitt]

yeah, sounds like water pump. If you want to make sure the noise is not coming from inside the engine, remove the belt and start the engine. My water pump made a very similar noise when it was dead

[NYC-SE]

yeah, sounds like water pump. If you want to make sure the noise is not coming from inside the engine, remove the belt and start the engine.

For a very short period of time!