om642 cdi turbo wistle after 1800/2000 rpms
Thread Starter
Junior Member
Joined: Nov 2013
Posts: 54
Likes: 5
'06 e320cdi
om642 cdi turbo wistle after 1800/2000 rpms
I hear wistle/noise from turbo when engine is above 1800rpm on neutral/parking. When i driving, on open windows i hear same wistle/noise when rpms are above 1800. Hose from/to inter-cooler are OK.
I recoreded video/sound on 2500rpm not clear sound of the noise
My engine is om642(224hp), without DPF filter(removed)/catalisator(removed).
Is it normal or there is a problem? Please, answers from people with that car/engine or with experience. Thanks !
I recoreded video/sound on 2500rpm not clear sound of the noise
My engine is om642(224hp), without DPF filter(removed)/catalisator(removed).
Is it normal or there is a problem? Please, answers from people with that car/engine or with experience. Thanks !
MBWorld Fanatic!
Joined: Jan 2016
Posts: 2,749
Likes: 881
From: In the Shadow of the Tetons
2013 ML350 Bluetec
well it IS a turbo after all. What does it sound like when the engine is actually being used and the turbo is producing pressure? Has the sound changed in any way since you've owned it?
When the engine isn't in gear, it doesn't take much fuel to raise up the RPM's. It also doesn't make much exhaust which is what spins the turbine, so it doesn't turn the turbo that fast compared to when you've got your foot on the floor in 5th gear and are actually boosting pressures. The turbo is spinning in the "audible" range.
When the engine isn't in gear, it doesn't take much fuel to raise up the RPM's. It also doesn't make much exhaust which is what spins the turbine, so it doesn't turn the turbo that fast compared to when you've got your foot on the floor in 5th gear and are actually boosting pressures. The turbo is spinning in the "audible" range.
Thread Starter
Junior Member
Joined: Nov 2013
Posts: 54
Likes: 5
'06 e320cdi
well it IS a turbo after all. What does it sound like when the engine is actually being used and the turbo is producing pressure? Has the sound changed in any way since you've owned it?
When the engine isn't in gear, it doesn't take much fuel to raise up the RPM's. It also doesn't make much exhaust which is what spins the turbine, so it doesn't turn the turbo that fast compared to when you've got your foot on the floor in 5th gear and are actually boosting pressures. The turbo is spinning in the "audible" range.
When the engine isn't in gear, it doesn't take much fuel to raise up the RPM's. It also doesn't make much exhaust which is what spins the turbine, so it doesn't turn the turbo that fast compared to when you've got your foot on the floor in 5th gear and are actually boosting pressures. The turbo is spinning in the "audible" range.
Thread Starter
Junior Member
Joined: Nov 2013
Posts: 54
Likes: 5
'06 e320cdi
I think the noise come from wastegate. I think, the wastegate is opening when rpms are above 1800/2000.
My questions is, which sensor control wastegate. I know that turbo positioner control it, but depend on which sensor data. Maybe sensor for back pressure?
EDIT: engine is '06 om642, 3.0 V6 cdi
My questions is, which sensor control wastegate. I know that turbo positioner control it, but depend on which sensor data. Maybe sensor for back pressure?
EDIT: engine is '06 om642, 3.0 V6 cdi
Last edited by Mercedesa.Net; Jun 1, 2016 at 09:58 AM.
MBWorld Fanatic!
Joined: Jan 2009
Posts: 9,224
Likes: 1,798
From: V E G A S
1922 Ford Model T / no OBD
I am confused what engine you have.
Per my knowledge cdi engines do have variable fins on turbo and no wastegate.
Than if you'd have air leak, that would trigger a code.
Per my knowledge cdi engines do have variable fins on turbo and no wastegate.
Than if you'd have air leak, that would trigger a code.
