I had a look at a 20004 Saab 9-3 1.8t (150bhp) and it makes this whistling noise during acceleration. The pitch increases as you accelerate and go up the rev range. It is literally a high pitched humm/whistle that increase in pitch as you go through the mid>upper range. Whoooooouuuuum. No noise when idle, or on hitting the accelerator in neutral, so I'm assuming its turbo related.
No such noise on the three 2.0t (175bhp) that I drove.
Surprsingly, I can't seem to find any meaningful information on this on line. Most of the info seems to relate to the old pre 2002 hatchback 9-3, rather than the 2002+ saloon. Some information says is indicative of turbo wear ie loose impeller rubbing against the casing, others say its just how turbos are, but the latter doesn't make sense given my experience of the 2.0t cars.
Is this likely to be a minor issue eg. hose, pipe, or should I be majorly concerned?
Also is the 1.8t (150bhp) the same engine as the 2.0t (175bhp) apart from the map?
No such noise on the three 2.0t (175bhp) that I drove.
Surprsingly, I can't seem to find any meaningful information on this on line. Most of the info seems to relate to the old pre 2002 hatchback 9-3, rather than the 2002+ saloon. Some information says is indicative of turbo wear ie loose impeller rubbing against the casing, others say its just how turbos are, but the latter doesn't make sense given my experience of the 2.0t cars.
Is this likely to be a minor issue eg. hose, pipe, or should I be majorly concerned?
Also is the 1.8t (150bhp) the same engine as the 2.0t (175bhp) apart from the map?
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