Question about 1996 Mitsubishi Montero

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2.8td turbo making a whistling noise, head already changed, 2 turbos later still making same whistling noise, any suggestions please?

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Try to see if the blow off valves are stating open

Posted on Nov 20, 2009

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sounds to me the blow off valve is working for the turbo mabye deffective .

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turbo whistle is common as it comes from the tips of the compressor wheel passing through the sound barrier and the turbulence occurs. IN the older trucks you would the turbo whistle as the engine reached full RPM just before a gear change. In smaller engine it is not do noticeable as there is an excess of air pressure that keeps the compressor wheel at a lower rpm and the pressure is dumped out. Turbo compressors reach revolutions in excess of 120.000 rpm under full load If it has just started to make the noise then check the intercooler system for leaks--loose clamps--- splits - Have the turbo compressor checked for damaged fins from the ingress of fine dirt from a bad air filter---check the air filter is not blocked as the turbo speed may result from running in a partial vacuum ( no load on the compressor wheel)

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Peugeot boxer 2012 has poor power and whistle noise when you try to drive it on


If you have a turbo on this engine then check for loose / blown rubber hoses from the turbo to the intercooler and from the intercooler to the manifold. Check for cracks in the intercooler . I suggest this because the whistling noise is high pressure air escaping and the poor performance results from not having the boost available.

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I have 2005 6 litre sd and when under load my turbo boost disappears followed by a air whistle sound


if you have shop air pressurize after the turbo ,make soapy water . find leak visually, whistling noises often mean leaksso then turbo pressure dissapears//gentle please turbo does not break 50 pounds of pressure whith

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Nissan Navara STR 2006 d22 3lt turbo. Turbo is whistling very


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.

Thank you,
Norse

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I have a 2003 d22 3.0lt td nissan navara it makes a loud whistling noise went it starts 2 boost up its kinda coming from above the starter motor


check pipe connected to turbo it maybe split/also turbo unit itself may need replaycing/fan inside turbo maybe worn

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WHISTLING BELOW TURBO


Its surely not turbo, its is somewhere a hole or leak in turbo air filter housing or air inlet pipe that is making noises when turbo sucks air. check the air pipes wheather they are fitted correctly. Take a keen look at air hose and close any hole with silver tape check the hose is fitted correctly in Turbo air filter housing (if not then it makes whistling noise when air is being sucked by turbo) . Clean all air filters and then give it a go.

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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 Answer

Dodge ram 3500 clown whistle


sounds like you have a turbo with a bad bearing.
pull of the turbo and rotate it by hand to see if it is hanging up.
Most turbos start to make a different noise when they start to go.
Sometimes dirt can bypass the air filter if is not changed on a regular basis and can cause the turbo to fail or become dirty enough to cause it to spin slower, (the dirt prevents the exhaust to spin the turbo at the right speed and the air passing the fins can whistle), it will cause bearing failure after a while. Also if you have too much soot in your exhaust from too much oil, the exhaust side of the turbo can become too dirty to operate properly

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