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6th March 2020, 17:03 | #1 |
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Rover 75 Saloon Join Date: Dec 2018
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Turbo issue?
Hi. Got a 2003 75 1.8T which has developed a noise when accelerating. I'm pretty light-footed, and the noise (a sort of low squeal) only happens when I use more throttle than normal, at any revs, but not when I'm cruising at a constant speed. Note that it doesn't do it at all when when the car is stationary and the engine is revved (i.e. not under load).
Wondering if maybe it's a fault with the turbo, which presumably only really kicks in when you open up the taps. Grateful for any ideas guys! Thanks. |
6th March 2020, 17:04 | #2 |
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Squeals can be belts slipping. Check that they are tight and in good condition. Could also be clutch slip or slave bearing.
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6th March 2020, 17:10 | #3 |
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Thanks, but why would they only squeal when I apply more throttle? The noise isn't dictated by the revs, only by the amount of throttle I use.
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7th March 2020, 09:56 | #4 |
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Unlikely to be the turbo as the bearings are basically oil.
ie. Quiet.---They run at very high revs. Maybe up to 70,000 rpm. No oil and the turbo would seize in seconds. Sounds more like a slight air induction leak as it seems to appear when the engine demand for air increases with a greater throttle opening. |
7th March 2020, 21:38 | #5 |
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Pull the pipe of the turbo and check for free play in the turbo shaft, I have seen these wear and the vanes then rub against the housing under load, this can cause the squeal you mention.
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