Hi guys.

English is not my mother tongue, so I'll try to explain as good as I can, and hopefully someone knows what I'm talking about.

 

I have a 2010 Superb Elegance 2,0TDI 140hp.

Last week, about Wednesday I got this weird sound in my car when i started up heading for a shop. The sound dissapeared halfway there (3min drive).

 

When i left the shop there was no sound, but after i started up again after my second stop, there was this rattling/knocking sound from the engine bay area.

 

After several people (with knowledge in the area of cars and mechanics) have heard the sound, I still don't have a clue what it can be. The suggestions vary from crankshaft bearings to fuel injectors to oil.

 

Since I changed oil early this summer to a cheap brand here in Norway, I thought maybe this could be the solution, so that was where I started.

 

The banging noise seems to me that it comes from around the turbo and intake. When I feel the engine itself there is only the usual vibration from it, but when I hold my hand on the airfilter-box I can feel every beat this noise makes.

The noise follows the revs of the engine and is a destinguished bang from one of the sylinders in may seem.

If there was from several sylinders there would be many more bangs per rev than it is.

 

Since I put some cheap oil in the engine earlier, I thought maybe the oil was too fat to reach the top of the engine where the valves and the camshaft is, so I thought i would start there and see what happens.

 

Today I changed the oil again, with a new oil filter and a new plug at the bottom with the right oil with the right spesifications for my engine, but the noise didn't go away when I testdrove my car.

 

When the engine reaches 'maximum hotness', the sound comes and goes.

 

 

Do you think the oil needs to circulate the engine a couple of days of driving or do you think that there is a problem with valve/fuel injector/camshaft or something?

 

Could it be a crack in the exhaust from the engine block or manifold that brings out these bangs?

Have you had the Emissions Software Update?  Some owners report strange noises from the engine after the "fix".

 

Dave

Sometimes knocking sounds can simply be the air box moving around. It's worth checking whether everything is assembled and tightened correctly around the air box too. 

Have you had the Emissions Software Update?  Some owners report strange noises from the engine after the "fix".

 

Dave

No, I haven't. My car was not affected by that case.

 

 

Sometimes knocking sounds can simply be the air box moving around. It's worth checking whether everything is assembled and tightened correctly around the air box too. 

Yes, disassembled the air intake all the way in to the turbo, and fastened it when I put it back together. Noise was there both before and after I did so.

video?