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Originally Posted by bullrun87 Sounds like an engine mount issue to me. It happened in my previous car where car would vibrate and make weird sounds in a narrow rpm range in every gear. Check all engine and gearbox mount points, bushings get ineffective/ worn with age and cause the engine to transmit vibrations to the chassis. |
That sounds like a fair point, the engine mount was removed too when the timing chain job was done, so this could be the one, let me get this checked.
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Originally Posted by Rshrey22 Your car's clutch is going bad. This whining noise that appears at a particular rpm band (mostly early) means that the clutch is slipping.
Try to focus on how the car picks up pace, although you might not be able to notice it as the 1.3 multijet is already jerky to drive (as the turbo spools up).
Also, your car has already seen some miles, so it's better if you get thr clutch checked. |
Hey, I doubt it could be the clutch for the simple reason
1) The clutch is only 20 thousand kilometers old, I got it changed at 1 lakh 37 thousand km
2) The clutch is not slipping at all
2) There is no judder
3) It's really light too
Although it could definitely be something related to the clutch where in some vibrations are being put out at a certain rpm, I will get this checked.
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Originally Posted by Traveler It is possible that your turbo is making that noise due to worn bearings. Turbo on a diesel engine will usually not spool if you rev your car in neutral. Turbo will only spool under load. That explains why you don't hear the whooshing when you rev your car in neutral. Best to get it checked at a good FNG. |
This could be the cause, at certain engine rpm's under load the turbo is spinning at a certain rpm at which the vibrations are being emitted from the turbine due to play and when at idle we are getting it upto that speed, the turbo is not spooling at that rpm.
Also what it could also be after thinking a lot is that there could be a leak somewhere in the exhaust side which is making itself felt only at that particular rpm maybe?
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Originally Posted by --gKrish-- I beg to differ as in my car(Linea multijet) with the same engine, the wastegate release sound can be heard while revving in neutral, which means the turbo does spool.
Is there any vibrations associated with the noise?
if yes, within that rpm range, some component's natural frequency matches the vibrations at this rpm range. I'd look for vibration damping devices like engine mounts and also flywheel and clutch misalignment. (Check pressing the clutch while in gear at that rpm). Is the noise present with the AC on/ off? (I remember reading EGR valve actuation is dependent on the AC.)
If the whine is more like air leakage or faint whistling, look for leaks in EGR circuit. I'm sure you'd rule out turbo plumbing leakage as you do not experience loss in power or smoke.
Edit: Just noticed that your might be a BS3 model, then you can disconnect the EGR and check.
PS : I had a similar noise around 2k RPMs after the timing chain and clutch kit change which went away after 5k Kms. It happened only in a small rpm band. |
I think the exhaust gases which spool the turbo are more under load than under idle revving for the simple reason, that when I jacked the car up and took it at 2900 in 4th gear, I had to only depress a fraction of the accelerator than what I would depress when the car is in loaded condition, this means less fuel is going in the combustion chamber at that rpm in the unloaded condition which translates to less exhaust gases being released which means the turbo spooling in unloaded condition will be under less boost than in loaded condition.
I will check the engine mounts and the flywheel too. The noise is present with AC on and off both.
I think your EGR leak point sounds very fair and a good idea, let me disconnect the EGR circut and check if the noise is present or not. I am going to get to diagnosing all this this weekend.
This noise happens for me in such a narrow rpm band too, like 2800-2900, after that it vanishes
Thanks for all the suggestions
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Originally Posted by a4anurag Could be the plumbing related to turbocharger and/or the intercooler that's letting some air escape giving you that sound at that RPM. Get that checked. |
Yes, I will get this checked too.
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Originally Posted by samaspire Do you use an FM transmitter? Have you checked if the sound is coming from the speakers? |
No, I eliminated this possibility right from the first go.
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Originally Posted by Jaggu Have you got the gearbox and clutch checked? Since it is speed and rpm related these are the most likely culprits. Wheel bearings usually gives a hum and rarely a whine. If it was only RPM related then you need to check the engine pulleys and bearings checked. |
Its more of RPM related, as speed is just a byproduct of me putting it on load condition. I will remove the belt from the entire pulley mechanism and go for a drive and see if anything changes.
Sorry for the late reply, I had been to Mahabaleshwar for a road trip over the weekend, I drove the car from Ghatkopar to Dombivali in early mornings and we took my friends Ertiga to Mahabaleshwar rather than my Swift.
What I could observe while driving till Dombivali in the dead of empty roads was, the sound is coming from somewhere near the foot well near the clutch pedal or maybe the firewall behind the dashboard. The exhausts rests below it, so does the turbo and EGR.
Anyone faced a similar issue?