Hola. I'm looking to purchase a rebuild kit and from what I have researched, I believe that I have a Garrett T3 (not a KKK). The local MB dealership (sigh) was unable to determine which mfr I have from my VIN #. My understanding is that the Garret has the boost control valve hose pointing towards front of car, whereas KKK comes off the side.

Can anyone confirm that this is indeed a Garrett T3 in my pic? And for those that may have ventured where few have trod, can the standard bearing kit rebuild be done on the car w/o removing the whole turbo? (I've sprayed the bolts here)

Also, assuming this is a T3, are the repair kits vehicle-specific? I have an '85 300TD.

Thank you!

http://s3.postimg.org/55hnqj343/image.jpg

What year / model is your car? I'm guessing a late 300SD or 300D?

With the boost hose going to the wastegate it looks like a T3 to me.

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I have an '85 300 TD. Thanks.

A good question is why?

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OBK #42

Well I am trying to identify the recent mechanical noise that has developed in the past few weeks. It definitely is coming from the turbo-side of the block and seems to be worse under acceleration. Hence my belief that it may be turbo bearing.

Possibly related or not, the turbo has been inop for some time. I figure that I would tackle that issue after I put the new guts in. The car only gets about maybe 5k miles are year- mostly around town, so the turbo hasn't been too missed. Out on the highway, however, it is pretty apparent as I have little hill climbing power.

As I have mentioned in some of my previous posts, no one around here (SW MO) aside from the glamorous dealership, knows anything about this car, so I'm sort of my own appointed resident mechanic. Thanks.

Garrett and Air Research are the same company. On the back of the Compressor Housing (the side that faces the cast iron Bearing Housing)there is Tag. It will have the Mercedes Part Number and I believe the Model Number like T-3 or T03 on the Tag and the Maker.

You will likely need to get a Mirror and Flashlight to find it.

As far as I know all of the Garrett Turbos for the 300D 617.95* Engines have the same innards in the Turbo.

However, if the Turbocharger has ever been rebuilt or exchanged it is possible for it to have oversized Bearing on the OD and undersized ID Bearings for the Shaft Journals.

If the Noise is really coming from the Turbocharger that means something is making Metal to Metal contact. That means either the Compressor Wheel Fins are rubbing the Housing (most likely) or the Turbine Wheel is rubbing the Housing.

You might consider taking the Turbo apart to see before ordering any parts.

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84 300D, 82 Volvo 244Gl Diesel

Appreciate the input Diesel911. Is it feasible to do the rebuild w/o removing the whole turbo, like it shows this guy did here? http://s11.postimg.org/ah33b9bcj/image.jpg

Thanks.

It can be done that way if everything goes alright.

Unfortunately when the Turbos are assembled at the Factory they do not use any Neverseize Compound on the Exhaust end Bolts.
Sometimes those Bolts can be difficult to get out in one piece.
It is a real good idea to use a Neversieze type compound on the Bolts when you assemble it.

The only other issues I can see is that you need to be very careful when you remove the Tubo Intake Housing as one end is attached to the Intake Manifold. If you pull that Housing off in a manner that puts pressure on the Aluminum Compressor Wheel it is easy to bend or even break off Fins.

This is just a general comment. Putting new standard Bearings and Seals is not the same as rebuilding a Turbo; no more than rolling in New Crank and Rod Bearings and replacing the Crank Seals rebuilds an Engine.

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84 300D, 82 Volvo 244Gl Diesel

I also am finding that there are a couple different compressor-side seals that are available for the T3. Some say it needs encapsulated carbon and some say dynamic. Is there a way to determine this w/o cracking it open?

Thanks again D.

I am 98% sure all of the 617.952 Engines that use Garrett/Air Research Turbos use the Piston Ring type seals on both Ends. I believe those are the Dynamic Seals as the others are called a Carbon Seal and an Encapsulated Seal.

Some one has a similar question on one of the newer 60* Engines and (He had his Turbo apart) his had the Encapusulated type seal. But, that was a different Year and model.

Since Mercedes does not stock the innards for the Turbochargers there is no way to look up part numbers.

Depending on How educated the Seller is the Seller might know which Seals are used.

Also I removed the Compressor Housing from the spare one I have and it has a thin Paper Gasket around it.
When I look at the kits they show an O-ring.
The Paper Gasket does not come with the Kit.

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84 300D, 82 Volvo 244Gl Diesel