[Ryno 27]

I brought my M5c in for oil service and the SA recommended I have this done. Question to the board, has anyone done this? How often? Cost? I was quoted $500

[pbonsalb]

Don’t know how the S63 DI system does, but the N54 needs to be carbon cleaned every 50-100k miles.

[Danny D]

Interesting, the only way i know how to clean the valves on this motor is to drop the engine. what exactly are they offering ?
Edit: perhaps they are just offering a fuel injection cleaner into the gas tank ?

[Aronis]

watching this tread......you don't want to be the first M5 customer who's car they are going to do this too.....When they did my spark plugs at 25k miles, it took the tech 8 hours. Did not appear to have broken anything. LOL

Mike

[AHall]

Originally Posted by Aronis

watching this tread......you don't want to be the first M5 customer who's car they are going to do this too.....When they did my spark plugs at 25k miles, it took the tech 8 hours. Did not appear to have broken anything. LOL

Mike

Spark plugs at 25k miles?

[pbonsalb]

Originally Posted by Danny D

Interesting, the only way i know how to clean the valves on this motor is to drop the engine. what exactly are they offering ?
Edit: perhaps they are just offering a fuel injection cleaner into the gas tank ?

I don’t know this engine very well yet. So you cannot remove intake manifolds with the engine in the car?

I bought a BMS as JB4 and water meth system so hopefully I won’t need to clean carbon for a long time. I walnut blasted my E61 535xi years ago and it was pretty gooey. I had to do a lot of scraping prior to the blasting.

[Ryno 27]

Originally Posted by Aronis

watching this tread......you don't want to be the first M5 customer who's car they are going to do this too.....When they did my spark plugs at 25k miles, it took the tech 8 hours. Did not appear to have broken anything. LOL

Mike

They did my plugs too (at 17k miles) not 8 hours though…

[Danny D]

Originally Posted by pbonsalb

I don’t know this engine very well yet. So you cannot remove intake manifolds with the engine in the car?

I bought a BMS as JB4 and water meth system so hopefully I won’t need to clean carbon for a long time. I walnut blasted my E61 535xi years ago and it was pretty gooey. I had to do a lot of scraping prior to the blasting.

Correct - you would not be able to walnut blast with engine in car.

[F90bmwmastertech]

The service they are selling you is merely a pressurized connection at the fuel rail with a mixture of a fuel injector cleaning solution and fuel. Run the engine at idle for about 20min to allow it to clean the injectors and valves. Its approved by BMW but as far as effectiveness, I could not even attest. Im a firm believer if you use a good fuel, dont extended idle or atleast beat on your car periodically the carbon buildup will be minimal.

[pbonsalb]

Originally Posted by F90bmwmastertech

The service they are selling you is merely a pressurized connection at the fuel rail with a mixture of a fuel injector cleaning solution and fuel. Run the engine at idle for about 20min to allow it to clean the injectors and valves. Its approved by BMW but as far as effectiveness, I could not even attest. Im a firm believer if you use a good fuel, dont extended idle or atleast beat on your car periodically the carbon buildup will be minimal.

Solvent in the gas won’t clean carbon from the backs of valves, valve stems, and intake ports on a direct injection motor.

If you are a BMW master tech then you have seen and probably cleaned the carbon from the direct injection N54 intake ports and valves. What makes the S63TU direct injection motor different? I have read some car makers are adding supplemental port injection for this purpose but was not aware BMW is doing it.

[e92hunter]

I thought the S63TU2 had port injection thus not requiring walnut blasting/carbon cleaning?

[pbonsalb]

Page 67 of the link in the attached (page 71 of the pdf) describes the S63TU injectors as direct injectors operating at 200 bar pressure.

https://www.6post.com/forums/attachm...0&d=1360771557

[freshxdough]

Originally Posted by pbonsalb

Solvent in the gas won’t clean carbon from the backs of valves, valve stems, and intake ports on a direct injection motor.

If you are a BMW master tech then you have seen and probably cleaned the carbon from the direct injection N54 intake ports and valves. What makes the S63TU direct injection motor different? I have read some car makers are adding supplemental port injection for this purpose but was not aware BMW is doing it.

Fuel injection service is more to clean the injectors themselves and free up any gunk in them. The newer engines with direct injection don't seem to have carbon issues like the N54 did. Even the original N63 had issues with Carbon occasionally, although not nearly as bad as N54.

You run one 12 oz(?) can through the fuel injection system and then one can goes in the fuel tank.