Question about 2000 Volkswagen Passat 4Motion

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Passat 1.8t turbo problem

Hi,
I've got a 2000 passat 1.8t and recently the turbo started to make a whistling noise almost like a police car siren. It was at first very soft but is getting worse. Especially loud at low revolutions. Can you advise what is causing this and how can it be solved?

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A bearing going bad. Do you follow turbo shut down procedures? If you don't have time to do this then my suggestion is installing a turbo timer to do this automatically. When you drive the car specially a high speed and need to shut down the engine is the worse thing you can do to your turbo. The impeller spins double the speed of sound and takes quite a while to slow down specially when you shut down the engine. At the same time it is shut down, oil pressure is no longer provided by the oil pump and cooking from extremely hot turbo assembly. The end product is oil carbonizing and clogging moving parts. The term is called coking. A turbo timer will keep your engine running when you remove the key from ignition and lock the vehicle for a programmable amount of time. This will help the turbo to spin dow while lowering the temperature critical for a longer servie life of your turbo charger.

Posted on May 29, 2010

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This could be a number of things. I would start by checking your engine oil level because if the turbo is not getting oiled because of your oil level being low it will make these types of noises. Also, it could be the bearings on your turbo going out. The turbo spins at such a high RPM that if it's not oiled properly it can damage the bearing causing premature failure. If you haven't changed the oil in a while try doing an oil change and see if it improves. If not check to make sure the oil tube going from your oil pan to the turbo is not clogged or bent. If you have some mechanical knowledge you can try taking the turbo off and making sure the impellar isn't clogged or has an obstruction of some kind. If none of the above work I would recomment taking it to a mechanic for further inspection of the bearings.

Posted on May 29, 2010

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Posted on Jan 02, 2017

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