Noisy V6 light load

[jaffa]

Just updated my 2015 4cyl dark label with a Highline 580 after 200k trouble free kms.
Yes, lots more power but it has a very loud diesel rattle at light throttle. My 4cyl was never like that. It’s a definite diesel clatter, but very loud and it “turns off” as soon as you bury your foot.VW say it’s normal, but having 6 years in a 4cyl Amarok there was nothing like this. Engine is turbine smooth and quiet once underway, a bit too quiet actually, I miss the purr of the 4cyl under load.
I now listen to every V6 I can taking off, including Touareg, Q7’s, but they are just turbine smooth, just a gravelly sound at most.
Any ideas?

[HaydEn]

Mine is the same. V6 life


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[Lucas_R]

I have a Audi SQ5 with the V6 TDI and I cant say I have the same issue. I quite often drive with the windows down and the engine is smooth and quiet....most people dont even realise its a diesel until I tell them. Plenty of turbo whistle to be heard though.

My only issue with this car is transmission/prop shaft movement which puts a thump through the vehicle sometimes during light acceleration when changing from 1st to 2nd gear or deceleration.

[jaffa]

Having owned the 2L for 5 years, the V6 is a lot louder. I need to make a recording for VW, so will add it here if I am able.
Sounds very “truck like” but when it goes away, is smooth and quiet. I had a loan V6 once and didn’t notice it. Should have test driven it, but being a new vehicle, thought all would be good.

[jaffa]

Now done 30,000km and the rattle is a lot better. Only does it 50 percent of the time now and i can usually make it go away by a couple of hits of full throttle in a high gear. VW still says its normal. The rattle coincides with bad throttle lag. When it doesn't rattle, i have almost instant throttle response and nice turbo growl. I'm thinking its a turbo/waste gate issue, but seems like it is fixing itself.
The SQ5 is bi-turbo, so that may be the difference, Amarok is single i think.

[jaffa]

It may have been the oil change i did at 30k, but the rattle and lag have almost completely gone now, 32k.
I used Nulon VW spec 5w30. It will be interesting if it comes back after the scheduled service at 40k when they use Castrol.

[Lucas_R]

The Nulon Euro Spec oil is supposed to be very good quality oil - im in the process of changing over to the Nulon from Penrite to give it a try myself.

As for the throttle lag, I know you say it seems to be improved for now, but if / when it returns, I suggest you look into a throttle controller which are about $300 and they significantly reduce the throttle lag.