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The sound you are hearing is most likely the fuel pump. You can test this in the morning. Before you start the engine, turn the key on and see if you hear the noise. It should probably be about 4-5 seconds in length, then it will quit. This is the fuel pump ensuring the system has enough pressure to run correctly when the engine starts. Fuel will drain back ...


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Finally got confirmation that the noise is coming from the gearbox so it's either output shaft or (more likely) differential bearings as this is a common complaint for this 6 speed gearbox. Will have to get it repaired at a transmission specialist.


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I've recently (in the last three months) started running my tyres at relatively high pressure on my daily driver as I'm a hypermiler and higher pressure does indeed decrease rolling resistance and improve in-gear coasting range. Obviously I never exceed the manufacturers stated maximum printed on the sidewall. I have not noticed and appreciable difference ...


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Tyres pumped up to 45 bar would probably explode... What car do you have, as even 45psi sounds high for a normal car? You should always inflate your tyres to the manufacturer's recommended pressure. Over-inflating will lead to increased wear (so you'll have to replace them more quickly, negating any fuel saving!), and poorer grip and handling, leading to ...


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tl dr; More pressure = less noise. Here is a pretty good write-up about the affects of tire noise. In the write-up it states the following: Tires running higher inflation pressures generate lower noise levels compared to those with lower inflation levels. This holds true to my line of thought because a flat tire (or very low tire) will make a lot ...


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Jack the back of the car up, and spin the wheels by hand - comparing the two sides so you can tell what's different on the bad side. Try to shake the wheel vertically and horizontally - a worn wheel bearing will have more play in it than a good one. When spinning the wheel without load, a worn wheel bearing will make a slight rumbling sound, and might seem ...


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It is the sound of the fuel pump priming and pressurizing the fuel lines, which is absolutely normal. VW likes to use the opening of the driver door to trigger fuel rail pressurization. In fact, one could use the absence of the sound of the fuel pump as a tell-tale sign that the fuel pump relay is not functioning properly. As @Paulster2 points out, either ...



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