Checking for Carbon build up?

[DangerBruno]

I have a 2013 allroad with 50k, how can I check for carbon build up? Do I just need to dive in and check? And at that point should I just clean it regardless?


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[Furly]

Gotta remove the intake manifold and have a look at the valves and ports. You can clean it yourself fairly easily it just takes a lot of your day.

[hyperunion]

I'm hoping the e85 metal intake engines are better at resisting massive carbon buildup... 5 the injector for cold starts and all.... But at 50k.. There should definitely be some build up