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Discussion Starter · #1 ·
Hey folks,


I have this issue for quite a while and I still don't know how to replicate the noise, but first, let me give you some details.

My car did 140,000 KM and it runs just fine, and it's well maintained. The transmission runs well with no issues so far. The noise only becomes apparent when accelerating in drive. I took it to a good mechanic, and he says that the noise is from a failed wheel bearing, but I don't know how that is relevant? If it's the wheel bearing, I'd hear it when the car rolling no matter the drive mode is. Sometimes, I tend to believe it has something to do with the turbo or the throttle body, but again, I should hear it when I rev up the engine, but I don’t. I recorded the noise in the link below for your comments.


I appreciate your comments.

Thanks
 

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Hey folks,


I have this issue for quite a while and I still don't know how to replicate the noise, but first, let me give you some details.

My car did 140,000 KM and it runs just fine, and it's well maintained. The transmission runs well with no issues so far. The noise only becomes apparent when accelerating in drive. I took it to a good mechanic, and he says that the noise is from a failed wheel bearing, but I don't know how that is relevant? If it's the wheel bearing, I'd hear it when the car rolling no matter the drive mode is. Sometimes, I tend to believe it has something to do with the turbo or the throttle body, but again, I should hear it when I rev up the engine, but I don’t. I recorded the noise in the link below for your comments.


I appreciate your comments.

Thanks
OP, in the video you are just going straight and accelerating, no turning right? Correct me if I'm wrong, but the noise isn't constant when accelerating right? It comes and goes? A wheel bearing can make either a humming or grinding noise, but it is constant. Because it's rotational, a wheel bearing would start off pretty quiet at low speeds and get louder the faster you go.

Does the grinding noise align with the changing of gears in your transmission? It's hard to tell.
 

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Discussion Starter · #3 ·
OP, in the video you are just going straight and accelerating, no turning right? Correct me if I'm wrong, but the noise isn't constant when accelerating right? It comes and goes? A wheel bearing can make either a humming or grinding noise, but it is constant. Because it's rotational, a wheel bearing would start off pretty quiet at low speeds and get louder the faster you go.

Does the grinding noise align with the changing of gears in your transmission? It's hard to tell.
Thank you MisterHooman for your inputs.

The noise is more constant with acceleration, and it goes away when I leave the paddle and it's not aligning with the changing of gears, I can hear it when I drive up to 120 Km/h. In my recording, I was driving straight but the phone was unstable.

As you mentioned, it couldn't be the wheel bearing, and I agree with you. I may add to the description, that the noise is sometimes louder than what's been recorded in the video.
 

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Thank you MisterHooman for your inputs.

The noise is more constant with acceleration, and it goes away when I leave the paddle and it's not aligning with the changing of gears, I can hear it when I drive up to 120 Km/h. In my recording, I was driving straight but the phone was unstable.

As you mentioned, it couldn't be the wheel bearing, and I agree with you. I may add to the description, that the noise is sometimes louder than what's been recorded in the video.
It's more constant with acceleration but doesn't get louder? If you rev the car in park, is the noise still there?
 

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No, it doesn't get louder with acceleration. If I rev the car in P or N, there is no noise whatsoever.
How mechanically inclined are you? Do you work on your car yourself or take it to a shop?

I'm asking because we can rule things out, but it requires lifting the front end in the air so both tires are off the ground.
 

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Discussion Starter · #7 · (Edited)
I took the car to the Honda dealer today and they found out that the noise comes from the HPFP and they suggest I first replace the HPFP lifter, AKA the cam follower, and if that doesn't solve the issue I may end up replacing the HPFP. They told me that it is a common issue with many GDI engines. Hopefully this solves the issue.

I'll keep you posted.
 

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Discussion Starter · #8 ·
I took the car to a mechanic who's specialised in Honda and told me that the rattling noise comes from the turbo's wastegate which is common, and it has nothing to do with the HPFP as the dealer claims (of course the car is out of warranty, and they don't mind emptying my pocket on uncertain issues). I tend to believe the turbo is the case since the noise is more apparent from the passenger's side and more towards the turbo's side of the engine, and the question is, Is the turbo's wastegate actuator manually adjustable? I tried to google the issue and all I found was the wastegate rattling noise which is quite close to what I'm experiencing.
 
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