Strange noise

Questions specifically about a Diesel powered C3 (usually engine or fuel related problems)
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Diesel engine related problems
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My Name: Rando

Member
Posts: 3
Joined: Fri Feb 26, 2021 9:08 pm
Model: C3 2009-2013, New shape (A51)
Year: 2010 (10)
Engine Size: 1.6 (16v)
Fuel Type: Diesel
Mileage: 47800
Trim Level: Exclusive
Gearbox: Manual 5 speed
DPF: No
LHD or RHD: RHD (UK)
Engine name: DV4 16-valve diesel (90 PS)

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Hi, for the past month or so my 1.6 hdi has developed a noise and i can't get my head around what it is. Its loud when the engine is cold and idling. Once you take it past 1000rpm it dissapears. Then once the engine is warm it isnt present on idle. However if you gently ease the accelerator you can hear it again but not over the 1000 mark as before. My first call was to slack off the serpentine belt and fire the engine up so all but the crank pulley would be stationary. Unfortunately the noise was still present ruling out any of those obvious ones. The noise almost sounds like a bad bearing being spun quickly. The noise is also not affected by gears or clutch pedal. Ive attached a video link you can hear the noise over the standard diesel engine sound.

https://youtu.be/LUd4Ejc-u1U


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My Name: Arfur Dent

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Posts: 3340
Joined: Sat Jul 23, 2011 3:47 pm
Model: C3 2002-2005, Original shape model
Year: 2002 (52)
Engine Size: 1.4 (16v)
Fuel Type: Diesel
Mileage: 100000
Trim Level: Exclusive
Gearbox: Manual 5 speed
DPF: No
LHD or RHD: RHD (UK)
Engine name: DV4 16-valve diesel (90 PS)
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Well, it's loud.

Is the vacuum system working properly?


And is the performance ok?
Could it be a damaged inlet manifold?
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My Name: Rando

Member
Posts: 3
Joined: Fri Feb 26, 2021 9:08 pm
Model: C3 2009-2013, New shape (A51)
Year: 2010 (10)
Engine Size: 1.6 (16v)
Fuel Type: Diesel
Mileage: 47800
Trim Level: Exclusive
Gearbox: Manual 5 speed
DPF: No
LHD or RHD: RHD (UK)
Engine name: DV4 16-valve diesel (90 PS)

Post

Arfur Dent wrote: Thu Feb 17, 2022 11:13 pm Well, it's loud.

Is the vacuum system working properly?


And is the performance ok?
Could it be a damaged inlet manifold?
I always thought the engine itself was loud but perfomance feels fine it is remapped from its original horsepower though but thats been like that for over a year now and still feels nippy.
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