BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Powertrain and Drivetrain Discussions > N57 / M57 Turbo Diesel Discussions - 335d > E90 Diesel Turbo Maintenance & Servicing

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      05-10-2013, 07:14 PM   #1
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E90 Diesel Turbo Maintenance & Servicing

E90 Diesel owners, have any of you had your Turbocharger Serviced / Reconditioned?
My 320d is coming up to 95000 kms, still running well. I asked my Indy this same question and he said it never needed to be serviced which I found hard to believe given the many problems that can occur with turbos and may be averted with some preventative maintenance / recondition.
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      05-10-2013, 10:52 PM   #2

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What would you service?

A turbocharger is actually a very simple device, they really only have one moving part in most cases (not counting the wastegate). They just live in a very, very harsh environment. They work until they don't. The best service you can give them is keeping clean synthetic oil in the car, and following a reasonable startup and shutdown routine. Minimal boost for the first couple minutes, a bit of cool down time before you shut it off.

I've owned more than a dozen turbocharged cars, both gas and diesel, from a 1982 Volvo 245T to my current 2013 FIAT Abarth. I have never, ever, not once had a turbo related issue beyond a leaking oil line. Once. Volvos, Peugeots, Saabs, VWs, and now the FIAT. Most of them bought VERY used with lots of miles. Only a 185K mile 1985 Saab with a non-watercooled turbo had ever had the original turbo replaced out of all those cars.
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Last edited by krhodes1; 05-10-2013 at 10:59 PM.
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      05-10-2013, 11:37 PM   #3
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Agreed ^

Simple care during startup, warm-up, cool off & shut down. Should be ok.
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      05-14-2013, 08:46 AM   #4
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Right, the turbos in our cars are simple. Pretty much the bearings would be the only thing that would give out.

Some of the cars (like 330d) have variable-geometry turbos, which are more complex-- I wonder how their longevity is.
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      05-14-2013, 05:30 PM   #5

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My former BMW E46 330d had variable geometry, and it was said that I should expect aprox 250.000km. Mine lasted until 302.000km. Then it failed. Fortunatetly without blasting the fanblades into the IC og engine. It was replaced and I drove 250.000 more km in that car.
I had my current E91 330d turbo replaced last week after seeing blue smoke lifting the gaspedal. Instead of waiting for the unit to fail, I got it replaced with another hybrid version from TurboDynamics in UK. And now it runs better than ever with 225.000km on the clock.
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