My very faithful and wonderful 300D 617 got sick recently. Out of the blue, I was coming home from a 5 mile round trip to the drug store and out of the blue at perhaps between 65 and 70 this most awful racket started. Sounded like a kids bike when they put a card in the wheel to rub on the spokes, but incredibely noisy, like a license plate was in the hitting the spokes of a wheel.
Well, I do have a spare and will probably get the spare tuned up before I install it. I think there is an overhaul kit for them. Runs great, the noise comes on when boost goes over 5 PSI. In 4th gear it really starts making this awful racket just past 60 mph on the flat and level.

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Junqueyardjim
Christianity, if false, is of no importance, and if true, of infinite importance. The only thing it cannot be is moderately important. C.S. Lewis



1983 Mercedes W123 240D 4 Speed 285,000 on the road with a 617 turbo, beautiful butter yellow, license plate # 83 240D INDIANA

2003 Jaguar Type X, AWD. beautiful, good mileage,
Mom's car, but I won't let her drive it!

Bummer Jim sorry to hear about that

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1992 W201 190E 1.8 171,000 km - Daily driver
1981 W123 300D ~ 100,000 miles / 160,000 km - project car stripped to the bone
1965 Land Rover Series 2a Station Wagon CIS recovery therapy!
1961 Volvo PV544 Bare metal rat rod-ish thing

I'm here to chat about cars and to help others - I'm not here "to always be right" like an internet warrior



Don't leave that there - I'll take it to bits!

Sounds like you have too much in and out play due to a worn Thrust plate/Washer. As it wears the Compressor Wheel gets closer and closer to the Compressor Housing till the Compressor Wheel rubs on the Housing.

To a lesser extent the side play also increases due to Bearing wear making it a little wobbley and aiding in the Wheel rubbing on the Housing.

Then if you have enough Oil Bulid up on the Compressor wheel it effects the balance.

30 years of no problems with a Turbo is excellent service.

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84 300D, 82 Volvo 244Gl Diesel

I didn't notice your location but my turbo went to Tim's Turbos in Falls Church, VA. Came back looking like new. The price was fair and I'll use him again.

Dan

Thanks for the info guys. It is hard to believe how fast it went from the time I first heard it squawk and rumble to where I really can't drive the car. I would say less then a 100 miles. And the racket it makes is incredible, but we should remember the turbo is just below the floor on what I call the "toe board". So it is very close the car body and it does make a noise. I think now that I did hear it coming in the past few months, though I didn't drive the car much this winter. But I did notice that when I did get on it, the acceleration was just a little "jerky" or uneven, and it was making a distant woow, woow, woow as the engine accelerated. So I have at least two spares and will put one on, and then see if I want a rebuild. I just ordered a new vacuum pump also. But the car is such a pleasure to drive with the 4 speed stick. I really enjoy it!

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Junqueyardjim
Christianity, if false, is of no importance, and if true, of infinite importance. The only thing it cannot be is moderately important. C.S. Lewis



1983 Mercedes W123 240D 4 Speed 285,000 on the road with a 617 turbo, beautiful butter yellow, license plate # 83 240D INDIANA

2003 Jaguar Type X, AWD. beautiful, good mileage,
Mom's car, but I won't let her drive it!

what brand turbo kkk?

No, it is an AR model.

__________________
Junqueyardjim
Christianity, if false, is of no importance, and if true, of infinite importance. The only thing it cannot be is moderately important. C.S. Lewis



1983 Mercedes W123 240D 4 Speed 285,000 on the road with a 617 turbo, beautiful butter yellow, license plate # 83 240D INDIANA

2003 Jaguar Type X, AWD. beautiful, good mileage,
Mom's car, but I won't let her drive it!

Many Turbos have AR cast into the Compressor Housing and there is usually a Number also. It satnds for something like Air Ratio.

It is better you compare some pics for the Garrette and the KKK. If it is a Garrette (Air Research) there is a small Plate/Tag on the back of the Compressor Housing Plate.
It should have the Model Number and the Mercedes Part number on it.

Another possible is that one of our Members said there is an aftermarket company that sells new Turbos and no brand name was said.

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84 300D, 82 Volvo 244Gl Diesel

Minor nitpick, but IIRC, it's Garrett Air Research.

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"Senior Luna, your sense of humor is still loco... but we love it, anyway." -rickymay ____ "Your sense of humor is still loco... " -MBeige ____ "Señor Luna, your sense of humor is quite järjetön" -Delibes

1982 300SD -- 211k, Texas car, tranny issues ____ 1979 240D 4-speed 234k -- turbo and tuned IP, third world taxi hot rod

2 Samuel 12:13: "David said to Nathan, “I have sinned against the Lord.” And Nathan said to David, “The Lord also has put away your sin; you shall not die."

KKK turbos usually have the KKK logo on the compressor housing right before the intake manifold. Also, the wastegate is very different. The T3 looks smaller and less cast in the housing.

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1991 F250 super-cab 7.3 IDI. (rebuilt by me) Banks Sidewinder turbo, hydroboost brakes, new IP and injectors.
2003 S430 - 107K
1983 300SD - Tanoshii - mostly restored ~400K+.
1983 300SD - Good interior. Engine finally tamed ~250K.
Monark Nozzle Install Video - http://tinyurl.com/ptd2tge

Well, Senor Luna is correct. AR stands for Air Research. I suspect that by a big percentage the turbos in use are Air Research units. I have looked at a number of turbo equipped Benz and I have not seen the KKK model, at least that is what I think.
I wouldn't mind a good rebuild unit, but they are expensive, and if I have a used one that is good i will do that. Matter of fact the one I am going to use comes from an 83 that I bought a number of years ago from an instructor at the Knoxville TN vocational Diesel training school. Now he did teach only electrical classes, but he had use of the entire shop to do whatever, and he gave up on the car with about 450,000 miles on it, because of a failure on the nose of the crank. Now they repaired that crank with a JB weld type product that contained titanium and the ran it for about 75,000 miles with that repair. He really liked that car and drove a round trip daily of about 200 miles.

__________________
Junqueyardjim
Christianity, if false, is of no importance, and if true, of infinite importance. The only thing it cannot be is moderately important. C.S. Lewis



1983 Mercedes W123 240D 4 Speed 285,000 on the road with a 617 turbo, beautiful butter yellow, license plate # 83 240D INDIANA

2003 Jaguar Type X, AWD. beautiful, good mileage,
Mom's car, but I won't let her drive it!

KKKs are much rarer. I have one on the grey 300SD but the silver 300SD has a Garret T3. People debate which is better for various reasons.

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1991 F250 super-cab 7.3 IDI. (rebuilt by me) Banks Sidewinder turbo, hydroboost brakes, new IP and injectors.
2003 S430 - 107K
1983 300SD - Tanoshii - mostly restored ~400K+.
1983 300SD - Good interior. Engine finally tamed ~250K.
Monark Nozzle Install Video - http://tinyurl.com/ptd2tge

The Guy said He had an AR and I took that literally; see the pic.

People ought to say what the mean.

Note that the below pic is not a Mercedes Turbo but the AR ratio is often displayed on a lot of Turbo Charger but not always in the same place.

Attached Thumbnails

 

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84 300D, 82 Volvo 244Gl Diesel

Well, I could be corrected on this, but there is no "air" ratio on or of a turbo. It just sucks in as much air as it can. I think the "A/R" is the logo for Air Research Corporation .

__________________
Junqueyardjim
Christianity, if false, is of no importance, and if true, of infinite importance. The only thing it cannot be is moderately important. C.S. Lewis



1983 Mercedes W123 240D 4 Speed 285,000 on the road with a 617 turbo, beautiful butter yellow, license plate # 83 240D INDIANA

2003 Jaguar Type X, AWD. beautiful, good mileage,
Mom's car, but I won't let her drive it!

Until the wastegate is activated. These turbos are only so efficient before the compressed air is too hot to be effective in the engine.

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1991 F250 super-cab 7.3 IDI. (rebuilt by me) Banks Sidewinder turbo, hydroboost brakes, new IP and injectors.
2003 S430 - 107K
1983 300SD - Tanoshii - mostly restored ~400K+.
1983 300SD - Good interior. Engine finally tamed ~250K.
Monark Nozzle Install Video - http://tinyurl.com/ptd2tge