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Re: 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.
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1. Search utube for video.
2. Remove exhaust from turbo.
3. Disconnect air intake, oil supply lines.(don't allow any dirt to get in)
4. Undo bolts to manifolds, remove turbo.
It all sounds easy but this is one of the most miserable jobs I've ever done myself.
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
Turbo vehicles often sound like they are whistling when the turbo spools up because it is sucking in air at a high rate and it makes a bit of a whistling sound. Generally not a problem unless it is a different whistling that you are referring to.
if you have a pd engine and you say that it miss fires i would change the wire loom to the injectors if it persists the air flow meter is on the blink, has you car ever gone into a limp mode status were you couldn't rev then check your turbo ,this may sound strange but just had a 150bhp tdi which was remapped with a very simular problem
OK now what i am going to tell you, you need to listen to.... sounds like your turbo is on the way out and need to be repaired or replaced if you continue driving the car the spool may snap and go into your motor and that will cost you a new motor stop driving it... if you need to don't push the car be soft diesels are not a good car to push anyway take it and get it fixed or you will be out of pocket for some time i have had this happen here and it is not worth the damage