[slowblackx3f25]

have any of you done carbon cleaning on your n20 engine's?
My x3 is at 95,000 miles (153K KM) and I am thinking of getting walnut blasting done and cleaning the intake valves of carbon...

has anyone done it yet?

or should I wait a little longer?

if you did get this done, how much did it cost you?
I know BMW's aren't that bad as Audi/VW

[Opie55]

Originally Posted by slowblackx3f25

have any of you done carbon cleaning on your n20 engine's?
My x3 is at 95,000 miles (153K KM) and I am thinking of getting walnut blasting done and cleaning the intake valves of carbon...

has anyone done it yet?

or should I wait a little longer?

if you did get this done, how much did it cost you?
I know BMW's aren't that bad as Audi/VW

Personally, I would not do it absent symptoms, which typically includes a rough idle at low rpms. But even if I was thinking of doing it, it is not too hard a job to pull the intake manifold back a couple inches to see the valves. They will always be black, but unless they are really gunky, leave them alone.

[slowblackx3f25]

Originally Posted by Opie55

Personally, I would not do it absent symptoms, which typically includes a rough idle at low rpms. But even if I was thinking of doing it, it is not too hard a job to pull the intake manifold back a couple inches to see the valves. They will always be black, but unless they are really gunky, leave the alone.

Yes, that is true.

I only experience rough idle during cold start, but it goes away when the RPM needle settles.

It feels like the engine is misfiring but it is not, I check the car's misfire count and it's always 0.

I feel an engine vibration when the car's RPM settles, but it goes away within 10 seconds after the RPM settles. It's been like this ever since I got this 2017 x3 in January 2019 at 50,000KM (31,000 miles).

I will keep an eye on things, if I don't see any misfires/rough idle during cold start, I will not do CC... I will wait it out.

Thank you for your feedback

[n55david]

Completely useless. Don't waste your money unless you have a pcv valve issue.. which you don't.

[slowblackx3f25]

Nope, no issues at all, no CEL, no codes, nothing. My 2017 x3 (N20) drives smooth. No issues at all (thanking the car gods).

It's just that I was told to get carbon cleaning done on ALL direct-injection engine vehicles.

I will hold off until I see issues.

I'm going to get the brakes serviced and brake fluid flush and refilled instead.