??? 2008 E320 Bluetec, blow off valve not holding?
05-24-2013, 11:40 AM
#1
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Thread Starter
??? 2008 E320 Bluetec, blow off valve not holding?
I've recently started noticing, when I'm driving with the windows down (rarely did I do this until recently), that I can hear the turbo spool.
What I'm questioning, is whether or not the blow off valve is holding until the right pressure, as I can almost immediately hear the valve open at low rpm and low load.
1) I don't remember ever hearing the turbo nor the BOV previously (I've owned the car for 5 years)
2) If I can hear the BOV open/whistling, shouldn't it be more like a normal BOV, where I can here the psshh when I let up on the gas?
Thanks for any thoughts.
What I'm questioning, is whether or not the blow off valve is holding until the right pressure, as I can almost immediately hear the valve open at low rpm and low load.
1) I don't remember ever hearing the turbo nor the BOV previously (I've owned the car for 5 years)
2) If I can hear the BOV open/whistling, shouldn't it be more like a normal BOV, where I can here the psshh when I let up on the gas?
Thanks for any thoughts.
05-24-2013, 03:44 PM
#2
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Thread Starter
Hmm.. Now I'm reading that diesels don't have BOVs?
If not, am I hearing the wastegate of the turbo, perhaps through a crack in the exhaust manifold or exhaust?
Does anyone else hear their turbo spool and a high pitched wind sound from their bluetec or CDI even?
If not, am I hearing the wastegate of the turbo, perhaps through a crack in the exhaust manifold or exhaust?
Does anyone else hear their turbo spool and a high pitched wind sound from their bluetec or CDI even?
05-24-2013, 08:05 PM
#3
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06 E320 CDI (GONE), 14 Jeep GC EcoDiesel, 01 Disco II (GONE), 09 BMW X3 3.0 Si Xdrive
No BOV on this turbo, neither wastegate, it is VNT turbo and thus why spools quite fast at low rpm's. On any car with BOV or wastegate those will work to release the extra pressure usually at high rpm/engine load, but not at low rpm and partial to normal load.
05-25-2013, 09:18 PM
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06 E320 CDI (GONE), 14 Jeep GC EcoDiesel, 01 Disco II (GONE), 09 BMW X3 3.0 Si Xdrive
I hear my turbo spooling all the time and I would like to say that this is normal for this type turbos. As of the air sound you may want to check for air leaks, but if you have one you will get CEL most likely because of pressure lost.
05-26-2013, 02:30 PM
#6
Out Of Control!!
What is your VIN. Surprisingly I can't locate a 2008 E320 BlueTec????
Assuming you really have a BlueTec, the adjustable vane turbo does not spool(free wheel). I don't doubt you are hearing something, however, it aint the turbine wheel.
And like others have said, if you had/have issues with intake pressure and air temps the system would produce a fault. I can't wait to see the VIN
Assuming you really have a BlueTec, the adjustable vane turbo does not spool(free wheel). I don't doubt you are hearing something, however, it aint the turbine wheel.
And like others have said, if you had/have issues with intake pressure and air temps the system would produce a fault. I can't wait to see the VIN
Last edited by Plutoe; 05-26-2013 at 03:02 PM.
08-22-2017, 04:55 PM
#7
Junior Member
Thread Starter
Many years later, but you guys deserve closure..
Turned out to be the rubber charge tube between turbo and intercooler had a cut in it, and it was the air blowing out of it.
Once fixed, I don't hear the sound anymore.
Turned out to be the rubber charge tube between turbo and intercooler had a cut in it, and it was the air blowing out of it.
Once fixed, I don't hear the sound anymore.
