Hi Guys, ok here goes, Car is an 84 300 DT with 300K miles, Runs ok, a little tired, means harder starts in the winter. Minimal blowby,

The turbo doesnt always spin free when the engine is off, there is zero play in the bearings(laterally and axially), and no oil loss into the engine, but the turbo just feels sticky. spins just fine, but slowly.. diff to describe.

When i started it up watching the turbo, it slowly started to spin then after I reved it, It worked perfectly, The car has tons of power, minimal black smoke, turbo can be heard spooling at full boost.

Definilty makes good boost, and runs perfectly on the highway.

Has anyone else seen this before, I suspect that its all carboned up on the exhaust side, and that a few italian tuneups will clear this up.

Thoughts?

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1984 Euro 300SDC, (4spd standard)
1986 Toyota Landcruiser Diesel HJ60 5spd X2

Gone but not forgotten (some sold, some stripped)
1983 300 SD, 1985 300 SD, 1983 240D, 1986 300 SDL, 1985 300 SDL, 1983 300 D, 1984 300 D, 1985 300SD, 1987 300 SDL, 1983 300 SD, 1985 300 TD Euro, 1983 380SEC, 1990 300 D, 1987 300D, 1982 300D, 1982 300D, 1994 E420, 1987 300 TD, 1987 300 D, 1984 300 D

The turbo on my engine was like that when I got it. I think it has to do with how long the engine has been sitting and thus how much residual oil is in the turbo. Try spinning it a few hours after the car has been run, then try again after a few days and see if there is a difference.

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1979 240D- 316K miles - VGT Turbo, Intercooler, Stick Shift, Many Other Mods - Daily Driver

1982 300SD - 232K miles - Wife's Daily Driver

1986 560SL - Wife's red speed machine

The bearings in these turbos really need oil pressure to spin really good. Carbon buildup isn't very likely to stop it from spinning freely seeing that it will only be deposited while the thing is spinning.

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green 85 300SD 200K miles "Das Schlepper Frog" With a OM603 TBO360 turbo ( To be intercooled someday )( Kalifornistani emissons )
white 79 300SD 200K'ish miles "Farfegnugen" (RIP - cracked crank)
desert storm primer 63 T-bird "The Undead" (long term hibernation)

http://ecomodder.com/forum/fe-graphs/sig692a.png

I tried spinning my turbo by hand once after the car had been sitting for a long time, wasn't very easy.. It spins really easily with hot oil in it..

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Ich liebe meine Autos!

1991 Mercedes-Benz 560SEL | Megasquirt MS3-Pro | 722.6 transmission w/ AMG paddles | Feind Motorsports Sway Bar | Stinger VIP Radar | AntiLaser Priority | PLX Wideband O2 | 150A Alternator | Cat Delete
1981 Mercedes-Benz 300SD | Blown engine, rebuilding someday...
1981 Mercedes-Benz 300SD | Rear ended, retired in garage.
2009 Yamaha AR230HO | Das Boot

Excessive speeding? It ain't excessive till I redline!