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#1
06-05-2007, 12:59 PM
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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
06-05-2007, 01:41 PM
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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
12-23-2007, 01:44 AM
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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
12-23-2007, 01:54 AM
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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.
__________________
'95 E320 Wagon my favorite road car. '99 E300D wolf in sheeps body, '87 300D Sportline suspension, '79 300TD w/ 617.952 engine at 367,750 and counting!
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#5
12-23-2007, 01:59 AM
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My wagon has no noticeable wheeze......
__________________
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
12-23-2007, 02:55 AM
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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!
__________________
 '85 300D 190K milesrunning on B100 Biodiesel since 156K, SCRATCH THAT! I can only find Biodiesel at 1 location in Houston! (not very convenient)
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