Do you clean your valves?

[NYG]

Originally Posted by DrivingPassion

Well, would she cares since there are no visible nuts.

They're omnipotent.

[DrivingPassion]

Originally Posted by JamesGames

No, their mentality was actually that they have EPA standards to meet. If you're worried, get an Oil catch can and catch all the crap getting recirculated into the charge pipe / intercooler / intakes. Then check in 50k if you need walnut blasting, which I heavily doubt especially with an OCC. There have been people that opened up their S55 and valves are essentially clean at high mileage, however, blow by still occurs. The S55 just doesn't seem that prone to buildup compared to N54 / VAG DI cars, but as with all turbo / DI cars, blow-by is never a good thing, whether minuscule or not.

Sounds reasonable.
I'll look into OCC. Thanks for the explanation.

[jmciver]

As others have mentioned, the S55 seems to have a better design that resists the carbon buildup better than previous engine designs - to include some pictorial evidence posted on the net. However, if you are interested in further protection, an OCC is not a bad addition - I have the BMS one for this reason. In addition to the OCC, I also do routine cleanings with CRC GDI Intake Valve & Turbo Cleaner:

https://www.crcindustries.com/produc...-oz-05319.html

It is specifically designed to clean intake valves on GDI engines. I do this as preventative maintenance with every oil change (for me is every 5k miles). I have been doing this since I bought the car new.

Is it absolutely necessary to prevent catastrophic engine failure? I would say no - especially with the PCV design improvements on the S55. But no GDI engine can prevent all carbon buildup due to the basic nature of the engine combustion process and I don't mind using the product to help keep my engine running as clean as possible. It does not take much time and is not difficult to do.

[timhatimay]

Originally Posted by jmciver

As others have mentioned, the S55 seems to have a better design that resists the carbon buildup better than previous engine designs - to include some pictorial evidence posted on the net. However, if you are interested in further protection, an OCC is not a bad addition - I have the BMS one for this reason. In addition to the OCC, I also do routine cleanings with CRC GDI Intake Valve & Turbo Cleaner:

https://www.crcindustries.com/produc...-oz-05319.html

It is specifically designed to clean intake valves on GDI engines. I do this as preventative maintenance with every oil change (for me is every 5k miles). I have been doing this since I bought the car new.

Is it absolutely necessary to prevent catastrophic engine failure? I would say no - especially with the PCV design improvements on the S55. But no GDI engine can prevent all carbon buildup due to the basic nature of the engine combustion process and I don't mind using the product to help keep my engine running as clean as possible. It does not take much time and is not difficult to do.

The CRC product is interesting. What is your method for use? The instructions just say spray past your MAF sensor.

Tim

[jmciver]

I remove the MAP sensor on the charge cooler and inject the CRC stuff there. That spot is really easy to get to and provides the most direct route to the intake. Also, removing the MAP sensor from that location does not cause any faults as I don't disconnect the MAP sensor electrical harness. I just move it out of the way until I am done. I do use a helper in the drivers seat to keep Engine RPMs up while I am injecting the CRC stuff though.

[DrivingPassion]

Originally Posted by jmciver

I remove the MAP sensor on the charge cooler and inject the CRC stuff there. That spot is really easy to get to and provides the most direct route to the intake. Also, removing the MAP sensor from that location does not cause any faults as I don't disconnect the MAP sensor electrical harness. I just move it out of the way until I am done. I do use a helper in the drivers seat to keep Engine RPMs up while I am injecting the CRC stuff though.

Excellent info, dude! Thanks for sharing.

Now, these are much more usable info than talking about some girls-friend's ovaries or whether their own nuts are visible or not.

[DrivingPassion]

Originally Posted by jmciver

I remove the MAP sensor on the charge cooler and inject the CRC stuff there. That spot is really easy to get to and provides the most direct route to the intake. Also, removing the MAP sensor from that location does not cause any faults as I don't disconnect the MAP sensor electrical harness. I just move it out of the way until I am done. I do use a helper in the drivers seat to keep Engine RPMs up while I am injecting the CRC stuff though.

Sorry for the precautionary question: since the engine is ON and revving, this is not going to lead to the ignition of the CRC liquid leading back to the bottle in my hand and blowing up in my face, would it?

I know you have done this procedure many times, but what's the possibility of this happening?

[jmciver]

Originally Posted by DrivingPassion

Sorry for the precautionary question: since the engine is ON and revving, this is not going to lead to the ignition of the CRC liquid leading back to the bottle in my hand and blowing up in my face, would it?

I know you have done this procedure many times, but what's the possibility of this happening?

I would say the probability of that happening is extremely low to nonexistent as I am using the product IAW the directions. The flow path from the injection point I use to the combustion chamber is not a straight shot by any means. I am not a chemical engineer, but I can speculate that the flammable properties of this product are necessary since it is being used in the combustion chamber of the engine. The product needs to "burn" as part of the cleaning process in order to not clog up/flood the engine while it is running....

Edit: Here is another link that talks more about how it works and how to use it:

http://crcforshops.com

CRC also advertises this stuff for shops to use as a valve cleaning service on GDI engines. I can only imagine what a shop would charge for this service if they are only using this product. But for ~$15 a can at your local Auto Zone/Pep Boys/Advance Auto Parts/etc and 30 min or so of your time, doing this yourself is no brainer to me....

[DrivingPassion]

Good confirmation. Thanks.
I knew some good soul will show up to help his/her fellow M3 owners.

[moonluv810]

Originally Posted by jmciver

As others have mentioned, the S55 seems to have a better design that resists the carbon buildup better than previous engine designs - to include some pictorial evidence posted on the net. However, if you are interested in further protection, an OCC is not a bad addition - I have the BMS one for this reason. In addition to the OCC, I also do routine cleanings with CRC GDI Intake Valve & Turbo Cleaner:

https://www.crcindustries.com/produc...-oz-05319.html

It is specifically designed to clean intake valves on GDI engines. I do this as preventative maintenance with every oil change (for me is every 5k miles). I have been doing this since I bought the car new.

Is it absolutely necessary to prevent catastrophic engine failure? I would say no - especially with the PCV design improvements on the S55. But no GDI engine can prevent all carbon buildup due to the basic nature of the engine combustion process and I don't mind using the product to help keep my engine running as clean as possible. It does not take much time and is not difficult to do.

Thanks for the info!
I'm getting a can and will give it a try before the next oil change.

Here's another anecdotal observation.... I get a lot of black soot when cleaning the exhaust tips on my '15 GTI on a weekly basis.
I hardly ever clean the exhaust tips on my F80, probably once a month or so. And I get hardly anything on the rags I use to clean those tips, other than road gunk.

[DrivingPassion]

Yes and No.