Hi,

Lately I have been hearing an odd noise from my turbo. There is a usual whistle noise, at ~2500 or more when accelerating... It sounds just like someone whistling.

Lately though, I hear that, but there is also this sound that kind of sounds like a high pitched hiss. Almost like when letting air out of a tire, but more of a squeal type noise. (for lack of better explanation). It sounds like its coming from the front of the car, in the area of the glove box. But, its not heater or climate control related... The noise varies with engine speed and throttle position. I hear it going up after about 2100 RPM, then it quiets if I cruise steady state at ~53MPH, but any other speed below about 75, it is very audible.

I have no idea what this is, the air cleaner seems tight, feels tight, etc. The turbo C tube is tight on both sides. Teh small rubber tube that goes from one part of the turbo towards the top, to a lower place (dont know what it is really), has a minor crack at the connection, but it seems OK.

Any ideas, or suggestions? No oil is used, if thats a help on the turbo's health.

Thanks very much.

JMH

__________________
Current Diesels:
1981 240D (73K)
1982 300CD (169k)
1985 190D (169k)
1991 350SD (113k)
1991 350SD (206k)
1991 300D (228k)
1993 300SD (291k)
1993 300D 2.5T (338k)
1996 Dodge Ram CTD (442k)
1996 Dodge Ram CTD (265k)

Past Diesels:
1983 300D (228K)
1985 300D (233K)

wastegate

__________________
1985 300D Turbo ~225k
2000 F350 (Powerstroke) 4X4, SWB, CC, SRW, 6spd ~148k
1999 International 4900, DT466e (250hp/660 ft/lbs), Allison MD3060 ~73k

What about it? Is it broken, leaking, etc? Is this normal, or something I should look into?
Thanks

JMH

__________________
Current Diesels:
1981 240D (73K)
1982 300CD (169k)
1985 190D (169k)
1991 350SD (113k)
1991 350SD (206k)
1991 300D (228k)
1993 300SD (291k)
1993 300D 2.5T (338k)
1996 Dodge Ram CTD (442k)
1996 Dodge Ram CTD (265k)

Past Diesels:
1983 300D (228K)
1985 300D (233K)

It's pretty normal to hear a high pitched whine or hiss from the turbo. I wouldn't worry.

__________________
Regards,
Aaron

Check the hose going from the wastegate actuator to the top of the turbo. I looks like it is 3/8 I.D. fuel hose. Mine was doing that when I test drove it before I bought it. Had the seller replace the hose, (watched him do it to make sure) and the noise went away.

I would say it's normal, I don't usually hear mine unless I have the sunroof open and the radio off. I can make mine do that by letting off the accelerator at about 30mph. I wouldn't worry about it.

__________________
1985 300D Turbo ~225k
2000 F350 (Powerstroke) 4X4, SWB, CC, SRW, 6spd ~148k
1999 International 4900, DT466e (250hp/660 ft/lbs), Allison MD3060 ~73k