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Old 11-19-2010, 05:36 PM   #1
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2005 C7 blown turbo

Greetings from a new member. I have a 2005 Tiffin Phaeton with the 350 Cat C7. Bought the coach with 10k original miles in 2009. Recently on a local outing, the coach (now with 20k miles) lost power and put out a cloud of blue/white smoke that covered the freeway behind me. At first it appeared to be a cracked head (Inland Truck Service/Caterpillar joint diagnosis), but further digging has now revealed a blown turbocharger. Has anyone had any experience with this type of issue? What would cause a turbo failure in such a "young" engine? What other issues might come up as a result of this? Any insights would be appreciated
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Old 11-19-2010, 05:47 PM   #2
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My bet is that an engine with only 10K miles in 4 years did not get enough run time to get oil up in the turbo. They have bearings in them that need oiled on a regular basis. With a rear engine you likely did not hear the bearings go bad if that is what happened.

Just my opinion.

Dave
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Old 11-19-2010, 06:24 PM   #3
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Dave, thanks. Great thought. And you're right -- didn't hear a thing. It was running perfectly for about 20 minutes after I left the state park, then when I tried to accelerate up to speed on the interstate it just died. The Inland folks said when turbos let loose, they usually blow everything "out the tail pipe" but this one shot the oil through injectors 5 and 6. Killed both of them. I'm just wondering what other damage we might expect.
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Old 11-19-2010, 07:36 PM   #4
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Turbochargers are lubricated by the engine oil . Failures are caused by debris from intake-- somebody wasnt careful when changing the air filter.
Or air filters plugged up- if they do not let enough air through the turbcharger will over speed.
Dirty oil or shutting the engine off immediatly after a hard pull.
Or immediatly after starting the engine putting a heavy load on it.
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Old 11-20-2010, 08:16 AM   #5
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Another thought as to possible cause. Prior to shutdown, engine should be idled for three to five minutes after full throttle or high power operation such as climbing a
steep grade to allow the turbo to cool.
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