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  #1  
Old 06-05-2007, 12:59 PM
kbenjamin0106's Avatar
83 & 85 300d's Turbo's
 
Join Date: Sep 2006
Location: Western Pennsylvania
Posts: 204
Why does my turbo wistle in my 85 300d but not in my 83 300d

Ive been driving my benz's lately and ive been noticing that i can hear the turbo in my 85 300d but not in my 83 300d? Whats the deal with turbo? clean it?
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  #2  
Old 06-05-2007, 01:41 PM
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Join Date: Nov 2004
Location: CT, USA
Posts: 472
It might be the air recirculting valve not the turbo. The 85 should have one, but the 83 wont.

My 85 300TD whistled until I put a BB in the vacuum line going to the ARV.
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  #3  
Old 12-23-2007, 01:44 AM
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Join Date: Aug 2006
Posts: 19
Ah Ha!

(sorry to dig up an old post...)

I have exactly the same problem... my new (to me) '85 300TD makes a noticeable whistling/wheezing sound between 2000 and 2500 RPM. My '83 sedan is quiet as can be. I found another post on how to disable it and we'll see tomorrow if that fixes things.
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  #4  
Old 12-23-2007, 01:54 AM
dieseldiehard's Avatar
Dieseldiehard
 
Join Date: Oct 2002
Location: Bay Area No Calif.
Posts: 3,982
all the 617 turbos used in the 85's use an air recirculation scheme and it results in a wheezing noise. Thats one difference between the 85 and previous models, bedsides the differential gearing and the electronics for the Tach
I always thought the blue flying saucer thing also results in smoother shifts.
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  #5  
Old 12-23-2007, 01:59 AM
JimmyL's Avatar
Rogue T Intolerant!!!
 
Join Date: May 2004
Location: Sunnyvale, Texas (DFW)
Posts: 9,673
My wagon has no noticeable wheeze......
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Jimmy L.
'05 Acura TL 6MT
2001 ML430 My Spare

Gone:
'95 E300 188K "Batmobile" Texas Unfriendly Black
'85 300TD 235K "The Wagon" Texas Friendly White
'80 240D 154K "China" Scar engine installed
'81 300TD 240K "Smash"
'80 240D 230K "The Squash"
'81 240D 293K"Scar" Rear ended harder than Elton John
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  #6  
Old 12-23-2007, 02:55 AM
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Join Date: Jul 2006
Posts: 90
Smile

My '85 300D had the same noise/whistle. After numerous questions and posts, I dropped a BB (by the way, BBs are 4MM. The same size the service manual says to use to block vacuum lines for testing purposes) into the vacuum line to the ARV and the EGR, as well. Presto! No more annoying squeal/whistle! I recommend this to all.
While I'm posting, I'd like to thank everyone on this forum for all of their help and knowledge. I have learned so much about my car just by reading so many posts on this site. Merry Christmas to all of you!
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running on B100 Biodiesel since 156K, SCRATCH THAT! I can only find Biodiesel at 1 location in Houston! (not very convenient)
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  #7  
Old 12-23-2007, 07:42 AM
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Location: Cameron Park CA
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my 85 doesn't whistle one bit. My 84 though, whistled like hell! I loved that car, and I miss that whistle. I read somewhere recently that the whistling is commonly cuased by a bad rubber seal between the turbocharger and that U boot that connects the turbo and air cleaner. it goes bad, leaking unfiltered air into your engine and letting the whistle out. I recently checked that seal on my 84 and its hard as plastic. Ill definetly replace that before I put that engine back into service.
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  #8  
Old 12-23-2007, 09:04 AM
t walgamuth's Avatar
dieselarchitect
 
Join Date: Apr 2005
Location: Lafayette Indiana
Posts: 31,243
The '83 may not know the tune.....

Tom W
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Diesel loving autocrossing grandpa Architect. 08 Dodge 3/4 ton with Cummins& six speed; I have had about 35 benzes. I am finishing a 39 Studebaker Coupe Express pickup in which I have had installed a 617 turbo and a five speed manual....I also have a Lotus 7 replica autocrosser with a modified K20 Acura engine.
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  #9  
Old 12-23-2007, 11:05 AM
JimmyL's Avatar
Rogue T Intolerant!!!
 
Join Date: May 2004
Location: Sunnyvale, Texas (DFW)
Posts: 9,673
Quote:
Originally Posted by t walgamuth View Post
The '83 may not know the tune.....

Tom W

It may not know the "words"......
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Jimmy L.
'05 Acura TL 6MT
2001 ML430 My Spare

Gone:
'95 E300 188K "Batmobile" Texas Unfriendly Black
'85 300TD 235K "The Wagon" Texas Friendly White
'80 240D 154K "China" Scar engine installed
'81 300TD 240K "Smash"
'80 240D 230K "The Squash"
'81 240D 293K"Scar" Rear ended harder than Elton John
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  #10  
Old 12-23-2007, 12:06 PM
t walgamuth's Avatar
dieselarchitect
 
Join Date: Apr 2005
Location: Lafayette Indiana
Posts: 31,243
No, Jimmy, you say it may not know the words when it DOES whistle. When it does not whistle it doesn't know the tune!

Tom W
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Diesel loving autocrossing grandpa Architect. 08 Dodge 3/4 ton with Cummins& six speed; I have had about 35 benzes. I am finishing a 39 Studebaker Coupe Express pickup in which I have had installed a 617 turbo and a five speed manual....I also have a Lotus 7 replica autocrosser with a modified K20 Acura engine.
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  #11  
Old 12-23-2007, 12:56 PM
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Join Date: Sep 2003
Location: Portland, OR
Posts: 279
Is this a turbo wheeze or a transmission wheeze? I think there is a vacuum vent (or intake?) inside the car... placed there for 'cleaner air'.
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  #12  
Old 12-23-2007, 01:22 PM
Wodnek's Avatar
Vintage Mercedes Junkie
 
Join Date: Jun 2004
Location: Southeast Wisconsin
Posts: 1,658
My 85 has the whistle. My 79 SD does not. At least now I have an idea why.
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1982 380SL
1978 450 SEL 6.9 euro restoration at 63% and climbing
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  #13  
Old 12-23-2007, 02:56 PM
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Location: Coarsegold Ca
Posts: 691
In our SD, there is and has been a slight whistle since we acquired it. The turbo spins freely.

In our TD the turbo DID NOT spin freely and there was no whistle. I rebuilt that turbo which now spins freely and it whistles. My "opinion" is that the speed of spooling and RPM of assembly will impact the sound. This assumes it is balanced which if off (I am told) also produce a whistle. Again, this is my opinion and it is based on my experience.
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1980 300TD-T (82 Turbo and Trans) 159,000 Miles "Jackie-O"
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  #14  
Old 12-24-2007, 10:55 AM
Registered User
 
Join Date: Aug 2006
Posts: 19
That was my problem... I used Brian Carlton's 9 step guide to EGR/ARV freedom yesterday -- Today my car was as quiet as can be. And, I don't feel the turbo kick in at ~2500 RPM when the ARV closed. The power is smooth and constant all the way up.

Much better!

Thanks to everyone here! It's been about 1.5 years since I got my first diesel Mercedes and I wouldn't have gotten very far without all the information here! Thanks again and happy holidays!!!
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  #15  
Old 12-24-2007, 12:21 PM
dieselschnell's Avatar
80s Vehicular Archivist
 
Join Date: Jan 2007
Location: Poconos, PA
Posts: 58
Greta whistles "Dixie"-no wait, that's me-out my a$$.

DS
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1987 300D Turbo "Greta" 170k
1990 Ford F250 "Marnie" 93k
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