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Date: 1 May 2004 14:27:30 GMT
From: Dave Hinz <davehinznospamcop.net>
Subject: Re: broken turbo


On Sat, 01 May 2004 15:09:42 +0100, Johannes H Andersen <johsnospamfitter_n_o_s_p_a_m_.com> wrote: > > > Dave Hinz wrote: >> Usually the turbo doesn't fail at all. If it does, a common mode is >> that the bearings start getting noisy, > > If the turbo bearings go, then oil might spray into the air intake of > the engine proper and clouds of blue would result? I don't know; I've never had one of mine misbehave. The two turbos I've had apart belonged to others, and I don't know the smoke history of the car. It's been years, so I can't visualize how specifically the seals relate to the bearings, but I _think_ that that would be a different failure mode. The bearings are pretty much designed to let oil float all around them, so they don't block it from getting anywhere. The seals are further towards the airflow sides of the turbo. I've heard of those failing too, which would probably be the "smoke" mode of failure, as opposed to the "whine" or "howl" modes caused by bearings. Is there anyone here who has seen a meaningful number of failed turbochargers on Saabs who could comment? I don't think any individual will have seen many, if any, failures. Dave

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