Hi

i have 2016 1.2 DsG yeti. It has about 60 k on the clock.

The engine suddenly sounds louder and more throttley if that makes sense. Thought  it might be exhaust but had that checked and there was not a problem. any ideas?

many thanks

Check your air filter.

EGF regeneration.

 

@J.R.

Unlikely with a 1.2 TSI / Petrol.

 

 

@Tony60

As above in reply No. 1, if not done as it is due a replacement or at least a look see, 

and the spark plugs might be needing replaced, or at least inspected and the gap checked.

So as well to change the spark plugs.

 

PS

The exhaust internals can start to disintegrate and there is nothing to see, so not leak to be detected.

Edited 31 October, 20205 yr by e-Roottoot

Exhaust manifold needs tightning/new gasket?

Edited 31 October, 20205 yr by gumdrop

One way crank breather breaks off and can makes a little more noise. Often leads to a oily smell in the car or a slightly unsettled idle. Or as above a exhaust gasket or joint blowing.

Or a cracked manifold, or perhaps just a slightly loose sparkplug.  One way of checking for some of these problems would be to open the bonnet with the engine running (preferably on a calm day) and see if you get any whiff of exhaust gases rising out of the engine bay.  If so get a local garage to get their exhaust emissions tester probe and poke it into the engine bay in various places until the source is found.  Though if it is a big enough exhaust gas leak for you to hear inside the car I'd imagine there would be fairly visible signs.

When @Tony60said that he / she had the exhaust checked i did wonder if it was by a Fast of Foot Tyre & Exhaust fitter just putting it on a ramp and looking up, or by someone that did that and opened the bonnet and used all their senses and experience so their eyes, nose, hearing & touch.

Edited 1 November, 20205 yr by e-Roottoot

Turbo piping?

Apparently it’s the drive wheel bearings 

From your description it doesn't sound like wheel bearings to me.  They tend to get noisy gradually over 1000's of miles, and are unlikey to both fail at the same time.  One test is to listen when cornering on a smooth road - the noise will tend to get louder when the bad bearing is on the outside of the corner, i.e. when it is loaded up.  And of course, they make no noise at all when stationary.

 

The only time I have ever had a wheel bearing fail suddenly on a car was after fording deep water and then not using the car for a week, the bearing internals went rusty as water had got in past a faulty oil seal (it had a tiny nick in it).

 

By all means get the bearings changed if you have confidence in the diagnosis.  But brace yourself for it making no difference.

 

I am in more agreement with the posters who suggested the noise came from escaping exhaust gas or a hole in the air intake or breather systems.  Also worth checking the exhaust and engine pipework for any contact with the bodywork which could conduct buzzing sounds. 

 

As an example, I once had an Audi A3 that made underbonnet exhaust-leak noises.  After a lot of investigation, a combination of ears, nose and touch found a leak at the back of the engine. Impossible to see without a mirror. A casting with various stubs for pipes had an unused way blanked off in production with a thin metal plug.  This had rusted through with a hole a few mm across and was puffing out exhaust gas.

Apparently someone has a good line in bullsh1t, a service receptionist at Kwik-Fit or a main dealer by any chance?

I suppose to someone who hasn't had a bearing fail it might sound like a noisier engine if the bearing was in a really bad state, but as Austin 7 says it's not a problem that starts suddenly.  So usually the noise would increase over a period of weeks.

Also if the work hasn't been done yet, you could jack the car a few mm of the ground at each corner and try spinning the tyre quickly with your hands - with the car in neutral and brakes off (on flat ground and with the wheels chocked to prevent an accidental runaway of course).  If a bearing is bad you should hear an obvious grumble from that corner as you spin the wheel.