Grinding noise

[iboughtatahoe23]

I recently posted about a noise, I ended up sticking my phone in the engine bay, and I caught the noise. Can hear it much better. It’s like a rattle. I had brakes inspected and they said they looked fine. Any ways, here’s the Rattling noise

 

[Geotrash]

I recently posted about a noise, I ended up sticking my phone in the engine bay, and I caught the noise. Can hear it much better. It’s like a rattle. I had brakes inspected and they said they looked fine. Any ways, here’s the Rattling noise

Sounds exactly like someone left a 3/8" extension in there somewhere and it's rattling around. Seems RPM dependent so I would wager that it's something loose that's normally rigid, like a coil mounting plate, fuel rail, etc.

 

[OR VietVet]

Still say is a shield of some sort.

 

[iboughtatahoe23]

Sounds exactly like someone left a 3/8" extension in there somewhere and it's rattling around. Seems RPM dependent so I would wager that it's something loose that's normally rigid, like a coil mounting plate, fuel rail, etc.

Any easy way I can inspect? Don’t have jacks or stand unfortunately

 

[mikez71]

Could be lots of places.. Take engine cover off and start shining a light in there.. Maybe try a stethoscope to narrow down what area it is in.. Sounds like it's connected or sitting on the engine.. Maybe swerve back and forth to see if it will dislodge. (if it's a loose tool or hardware)

 

[iboughtatahoe23]

Could be lots of places.. Take engine cover off and start shining a light in there.. Maybe try a stethoscope to narrow down what area it is in.. Sounds like it's connected or sitting on the engine.. Maybe swerve back and forth to see if it will dislodge. (if it's a loose tool or hardware)

I have a stethoscope but the noise only happens when going like 30mph and I don’t hear it any other speed or at idle.

 

[Sam Harris]

Flexplate? Hopefully not

 

[mikez71]

I have a stethoscope but the noise only happens when going like 30mph and I don’t hear it any other speed or at idle.

Maybe pull the belts and check all pulleys (although you need to cut AC belt to check ac compressor)
Can take a short drive to see if no more rattle.

Or you might try one of these.. chassis ears..

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Once had a starter that was falling apart and it would make a little tinkly sound like that, until the gear completely fell out of the starter and starting banging around the bellhousing!

 

[B-train]

I'd say by the frequency of it, it's hitting something with a lot of teeth. Sounds flywheel-esk to me

 

[Doubeleive]

I recently posted about a noise, I ended up sticking my phone in the engine bay, and I caught the noise. Can hear it much better. It’s like a rattle. I had brakes inspected and they said they looked fine. Any ways, here’s the Rattling noise

AC PUMP, take belt off to verify. but I am 99% sure that's what it is, if confirmed leave belt off and get it replaced before it sends shrapnel through the whole system.
you can also look visually and see when the clutch activates and engages the pump the noise happens.
just start it up, turn on the ac and then go watch the ac clutch, it will engage and disengage every so many seconds

 

[iboughtatahoe23]

AC PUMP, take belt off to verify. but I am 99% sure that's what it is, if confirmed leave belt off and get it replaced before it sends shrapnel through the whole system.
you can also look visually and see when the clutch activates and engages the pump the noise happens.
just start it up, turn on the ac and then go watch the ac clutch, it will engage and disengage every so many seconds

A lot of people are missing that the noise only happens when accelerating at around 30 mph. Noise doesn’t happen any other time. How ever it seems to be getting louder and happening more .

 

[iboughtatahoe23]

I'd say by the frequency of it, it's hitting something with a lot of teeth. Sounds flywheel-esk to me

Been to shop 3 times for transmission they said it’s fine. So idk.

 

[iboughtatahoe23]

I'd say by the frequency of it, it's hitting something with a lot of teeth. Sounds flywheel-esk to me

Yeah, sometimes it will go away around 30 mph when it shifts.

 

[iboughtatahoe23]

Everyone’s saying all these things like flex plate, or flywheel, gears and stuff I have no idea what that is and apparently the shop can’t find it

 

[mikez71]

Start with the easy stuff.

Test the A/C compressor as Doubelieve suggested.

If you don't know what it is or where to look, might try driving and flip the A/C on or off when the noise happens so you can rule that out.

Little noises are the kind of thing shops don't really want to waste their time on, they usually aren't able to charge much for the time spent.

I say get the chassis ear and hunt down that noise! You don't need to know what anything is, just don't put anything close to spinning parts. I've never used one, but always wanted to try it.. so you should get one and write a review

 

[iboughtatahoe23]

Start with the easy stuff.

Test the A/C compressor as Doubelieve suggested.

If you don't know what it is or where to look, might try driving and flip the A/C on or off when the noise happens so you can rule that out.

Little noises are the kind of thing shops don't really want to waste their time on, they usually aren't able to charge much for the time spent.

I say get the chassis ear and hunt down that noise! You don't need to know what anything is, just don't put anything close to spinning parts. I've never used one, but always wanted to try it.. so you should get one and write a review

Definitely cannot afford the chassis’s ear. As cools as it is. And idk if it means much but my AC was working ok today. Noise was still there.

 

[mikez71]

You need to switch it on or off when you hear the noise to see if the noise changes/goes away.
No change, it's probably something else.

Second easiest thing is to take the accessory belt off. That would eliminate idler pulleys, alternator, water pump, power steering as possible culprits.

Maybe try moving your phone to different areas and record away. Get some good tape..

 

[B-train]

Or, do you have a loose shield somewhere that is vibrating. Maybe have someone run the gas pedal while you are underneath and try to pinpoint the noise

 

[iboughtatahoe23]

Or, do you have a loose shield somewhere that is vibrating. Maybe have someone run the gas pedal while you are underneath and try to pinpoint the noise

Doesn’t happen at stop. Only happens at 25-30 mph and only when I lightly tap the gas at that speed.

 

[iboughtatahoe23]

You need to switch it on or off when you hear the noise to see if the noise changes/goes away.
No change, it's probably something else.

Second easiest thing is to take the accessory belt off. That would eliminate idler pulleys, alternator, water pump, power steering as possible culprits.

Maybe try moving your phone to different areas and record away. Get some good tape..

This noise only happens when driving at 30 mph and lightly holding accelerator.