Something loose in the engine.

[eric81]

It is most likely the motor mounts. If you look at how they are made and put together, they move front to back AND up and down. It doesn't take much to jiggle the engine up and down. I am betting that your mounts aren't on quite right, or they are bad from the factory. It's the only thing I can think of. That and the battery, but that would be obvious... just grab the battery, and push really hard towards the back, then yank on it to bring it foreward. If it moves, tighten down the 10mm nut on it.

[GeneW]

Originally Posted by Swallow

HI everybody,

I have just joined this wonderful forum, happy to be between you!

I have bought a Sedan Yaris 3 months ago ( brand new ).

When I pass over some speed bump or something like that, I feel something jumps up in the engine compartment, as if something is loose ...

Has anybody have a similar experience?

Open up the hood and look. My guess is that the catalytic perverter has a heat shield - many do - and it might have come loose. I've had this problem with a Honda in the past, and it "rattled" when I would hit bumps in the road.

Gene

[vitzzz]

yes i have that noise also not sure what it is, sometimes i hear it from engine bay and sometimes from underneath. also there are noises from the fuel tank when i tap with my hand on the tank , i hear some type of noises which can be what we hear on bumps

[GeneW]

Originally Posted by vitzzz

yes i have that noise also not sure what it is, sometimes i hear it from engine bay and sometimes from underneath. also there are noises from the fuel tank when i tap with my hand on the tank , i hear some type of noises which can be what we hear on bumps

You are aware that the Yaris has FAR less sound proofing than most cars made today or in the past?

I've heard braking noises, gear train noises, exhaust rumblings and when I drive over road salt and gravel sounds like someone is pouring pea gravel onto a soda can.

I wonder if what you're experiencing is just the normal "sounds" of a Yaris?

Gene

[AlexNet0]

Ive gotten used to all of the random sounds and road noise/things sound like they are bouncing, now I just pay attention enough to know when something is rubbing/creaking, etc.

If you have doubts, have it checked though

[Swallow]

I investigated it deeper. I THINK I made a mistake... The sound seems to come from the steering box?! ( It's route is vague )


And one other sound! I hear a rattling sound when I reverse the car, especially when the engine is cold ( in the mornings ) !!! But as soon as I change the shift to D ( going forward ), the rattling sound disappears!

[MGargano]

Sounds dumb, but check the hood prop rod to make sure it's latched on top of the battery where it's supposed to be. The geniuses who did my oil change forgot to do this and I had a banging sound coming from the engine compartment when I went over bumps. I checked under the hood when I got home and VOILA... there was the hood prop rod, just laying on top of the battery, not latched in.

[AlexNet0]

Originally Posted by Swallow

I investigated it deeper. I THINK I made a mistake... The sound seems to come from the steering box?! ( It's route is vague )


And one other sound! I hear a rattling sound when I reverse the car, especially when the engine is cold ( in the mornings ) !!! But as soon as I change the shift to D ( going forward ), the rattling sound disappears!

the rattling is normal, mine has done it since day 1, and I dont even have an auto

[Swallow]

Thank you all,

I am very confused, maybe the sound is normal but this is not my first car. Even the used cars I owned haven't had such a sound when I pass over a sharp pavement bulge.

[Bob Dog]

Hood prop improperly secured?

[Swallow]

Originally Posted by Bob Dog

Hood prop improperly secured?

That is secured

[cfiimei]

Battery?

[eric81]

I said battery earlier, but no one ever listens to me...

[enobmort42]

i've found a rattling noise recently, but have figured out how to stop it. i first noticed it when i would close my doors, i'd hear it in the engine bay. so i opened it and started tapping on the top of the bumper to recreate the noise and sure enough.. to keep it from rattling, i would press hard on the metal that the bumper is fastened to and tap the bumper. no noise. almost sounds like a nut or bolt jiggling around in some hidden metal compartment... =\

[Swallow]

Originally Posted by eric81

I said battery earlier, but no one ever listens to me...

Sorry dear, I checked the battery , unfortunately the source was not that

[Swallow]

Originally Posted by AlexNet0

the rattling is normal, mine has done it since day 1, and I dont even have an auto

Have you bought it brand new?

[AlexNet0]

I bought it with 20 miles on the odometer. 2007 3dr 5spd LB

[Jeemee]

Mine too has a strange noise coming from engine bay. It's random and sounds like a really bad CV Joint. Like a pop sort of. Never figured out what it was. Is yours similar sounding?