Noise as turbo spools - Alfa Romeo Forum
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Noise as turbo spools

This is my first diesel, so I'm getting used to the various noises

However, there's one that's concerning me - as the turbo starts to spool, there's a noise that sounds a bit like a dry turbo bearing.

It dies away slowly when the throttle is lifted, and it also stops if it's boosting hard

I'm hoping it's something to do with the swirl flaps or the egr valve

There's often a step up in performance as the noise stops when accelerating

Any thoughts?
NigelO is offline  
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take hose of compressor end and see what play there is in the shaft bit moving the compressor wheel side to side and back and forth.......i think you will have side to side play and the noise your hearing is the wheel on the cover
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noise , spools , turbo

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