Question about Volkswagen Cars & Trucks
There may be a intake air leak or a bearing that is on its way out. Once the oil gets to the bearing it will become quiet.
Posted on May 06, 2014
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Posted on Jan 02, 2017
SOURCE: whistleing sound on golf gt tdi
It's probably the turbo you're hearing. They spin very fast and make a noise like that. Ever hear an 18-wheeler go by you and accelerate and they make that high-pitched whistle? That's the turbo spooling up. Now, if it sounds like a dentist's drill, that's usually a sign that the turbo is failing, but I'd bet that since your car is under four years old, as long as you've kept up on the maintenance, it's the normal turbo spool.
Posted on Aug 17, 2008
Remember, what is heard as turbocharger noise may not be caused by a noisy
turbocharger. Before replacing a turbocharger perform the following diagnosis.
A. If a loud whine or whistle is heard during acceleration and increases or decreases with rpm and load. This condition is most often the result of a loose clamp/hose at the turbocharger compressor outlet, charge air cooler inlet, outlet or at the intake manifold.
1. With the engine running at idle and the transmission in Park or Neutral with the parking brake set, feel for boost air escaping at each connection between the turbocharger compressor outlet and intake manifold. For limited access areas, spray soapy water on those connectors and look for bubbles.
2. Check the exhaust manifold and exhaust system for leaks.
I hope this helped.
Posted on May 16, 2010
you must have a air leak between turbo and air intake somewhere so run engine and have a good look but if the old turbo was worn out then this is why it sounds different as its quite normal for these vehicles to sound a bit potent to say the least
Posted on Mar 10, 2011
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