Are there any turbo upgrades for a 1987 300D Turbo 6 cyl 3.0 . The turbo isnt responding like it used too and its got about 300k. Id rather upgrade then rebuilt. Any ideas, I tried searching and got nothing.

Have you performed any diagnostics to determine the turbo is the culprit?

Or, would it be more accurate to state "The vehicle isn't responding like it used to"?

Well im pretty sure the turbo needs re-building, because when my father took it to get the enginie rebuilt a copule years back ( head gasket - timing chain - ) they told him that the turbo is deff going to need a turbo rebuilt soon... My father gave me the car now to work on, so I drove it and it doesnt feel like it used too... it feels much slower so im guessing the turbo is probably shot.

Do any tests yourself?

Spin the impeller to feel for radial or axial play?

Connect a boost gauge to determine whether the turbo has the specified output?

If you are fully convinced that the turbo is the culprit, then change it..........but without any data, I'm certainly not convinced.

Im very new at diesel turbo motors. Im around fuel injection turbo motors because i have one myself. Well anyways is there a vacuum line i can -T- so I could connect to a boost gauge. Do i have a KKK turbo or a Garrett , im on a 603 engine by the way

Boost is "pressure" and not vacuum.

And, yes, there is a pressure line that you can T into. On the driver's side of the manifold you'll find a nipple with a hose attached........at roughly the middle of the manifold. The hose will have a small hose clamp holding it in place. You can T into this line to measure boost.

You'll have to route the gauge into the cabin so that you can read it while driving. Get the engine above 3000 rpm at full load and read the boost gauge.

But, prior to any testing in motion, you should probably check the impeller for radial or axial play. Maybe the shop was knowledgeable and could see the turbo was in poor shape...........maybe not.........??

Even a turbo with shot seals and tired bearings will put out plenty of boost. Somthing is out of adjustment.

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