[GA/\/\/\/\A_CT]

Is this good maintenance? Any downsides?

What is a reasonable amount to pay, and what parts of engine should get blasted?

[NormanConquest]

I readed about people using it for the n54 and 55 but the b58 is a completely new engine.

[Golo2016]

Someone with more experience than I do can correct me if I'm wrong, but any direct injection will need the valves cleaned at one point.

[G.Newt]

Originally Posted by Golo2016

Someone with more experience than I do can correct me if I'm wrong, but any direct injection will need the valves cleaned at one point.

Correct, but N55 engines need it a lot less frequently than N54 engines, so there's some improvement going in.

[rockymtnpilot]

I still run a bottle of techron every 5k in my B58 since I started with my N54. I wouldn't preemptively get the walnut blast since your service advisor is going to try and sell it at some point and you have no way of verifying it's necessity unless your butt dyno magic.

[Mike@N54Tuning.com]

Originally Posted by G.Newt

Correct, but N55 engines need it a lot less frequently than N54 engines, so there's some improvement going in.

+1

I haven't seen any N58 walnut before and after pics so not sure how big of an issue on the B58 it is. On N54 it is pretty much mandatory maintenance every 60-80K

Mike

[IndotagSwizz]

your best preventive maintenance is to never use cheap gas, def nothing less than premium gas (pref. 93)....the main reason for issues with build up and dirt inside your engine comes from lower tier gas which contains little to none detergents, I can assure you if you have always used premium your engine is a lot cleaner that you might think since its been cleaning itself since day one of use

[IndotagSwizz]

Originally Posted by rockymtnpilot

I still run a bottle of techron every 5k in my B58 since I started with my N54. I wouldn't preemptively get the walnut blast since your service advisor is going to try and sell it at some point and you have no way of verifying it's necessity unless your butt dyno magic.

I would advise against this IMHO, your car is brand new you don't need this at all unless you notice symptoms that would warrant this kind of product, in my experience and opinion using these kind of chemicals on a brand new engine can only cause problems like eating out seals causing leaks.

[insanecoder]

Maybe if you are running a tune w/ high PSI..
I'm still waiting for a pic of a B58 oil catch can filled with oil
until I see one
or hear about lots more people needing walnut blasting
I will assume its not needed in B58

[rockymtnpilot]

Originally Posted by IndotagSwizz

I would advise against this IMHO, your car is brand new you don't need this at all unless you notice symptoms that would warrant this kind of product, in my experience and opinion using these kind of chemicals on a brand new engine can only cause problems like eating out seals causing leaks.

I'm warranteed against that sort of thing for the next 87k. I'm not against "routine" like walnut blasting, though

[Whistlefist]

Originally Posted by IndotagSwizz

your best preventive maintenance is to never use cheap gas, def nothing less than premium gas (pref. 93)....the main reason for issues with build up and dirt inside your engine comes from lower tier gas which contains little to none detergents, I can assure you if you have always used premium your engine is a lot cleaner that you might think since its been cleaning itself since day one of use

Walnut Blasting cleans the back of the intake valves. In a direct injected car, fuel does not touch the back of the valves, therefore, fuel quality isn't a determining factor really. Due to the crankcase ventilation system on N54 and to a lesser extent N55, some oil mist makes it back to the intake tract, where is burns/cokes to the back of the hot intake valves. Unlike port injected cars, fuel doesn't wash over the back of the valves and so there it stays until it is cleaned off with walnut blasting. I am unsure of how the B58 engines deal with crankcase ventilation, but I also don't think that many if any people have the miles needed on their cars to need walnut blasting at this point.

Since fuel never touches the valves on the back side, fuel quality doesn't matter as far as how dirty your valves get.

This also goes for any additives you may put in your tank like techron. There are other benefits to using good quality fuel, as well as additives, but keeping your intake valves clean on a direct injected car is not one of them.

[Golo2016]

Originally Posted by Whistlefist

Walnut Blasting cleans the back of the intake valves. In a direct injected car, fuel does not touch the back of the valves, therefore, fuel quality isn't a determining factor really. Due to the crankcase ventilation system on N54 and to a lesser extent N55, some oil mist makes it back to the intake tract, where is burns/cokes to the back of the hot intake valves. Unlike port injected cars, fuel doesn't wash over the back of the valves and so there it stays until it is cleaned off with walnut blasting. I am unsure of how the B58 engines deal with crankcase ventilation, but I also don't think that many if any people have the miles needed on their cars to need walnut blasting at this point.

Since fuel never touches the valves on the back side, fuel quality doesn't matter as far as how dirty your valves get.

This also goes for any additives you may put in your tank like techron. There are other benefits to using good quality fuel, as well as additives, but keeping your intake valves clean on a direct injected car is not one of them.

That's what I thought. It's just the nature of the beast.

[ray340i]

Originally Posted by insanecoder

Maybe if you are running a tune w/ high PSI..
I'm still waiting for a pic of a B58 oil catch can filled with oil
until I see one
or hear about lots more people needing walnut blasting
I will assume its not needed in B58

my catch can after 12k miles tuned spraying 100% meth and e98 just have vapor in it not even a drop

[WrxToBeamerGuy]

Starting this conversation back up.

Has anyone had their valves cleaned or has anyone done it themselves?

kern417

You answered the question on your live stream today. Thanks man.

[Wires]

Originally Posted by WrxToBeamerGuy

Starting this conversation back up.

Has anyone had their valves cleaned or has anyone done it themselves?

kern417

You answered the question on your live stream today. Thanks man.

Are you going to share what he said?

I'm genuinely interested since I know my N54 had issues, but no clue about the B58.

[WrxToBeamerGuy]

Originally Posted by Wires

Are you going to share what he said?

I'm genuinely interested since I know my N54 had issues, but no clue about the B58.

He said that our engine is really resilient and it doesn't seem to be much of an issue with it. He mentioned one youtuber who checked the valves and they were fairly clean at higher mileage. I cant remember if he mentioned how many miles it was.

My opinion is that it seems like something you need to do once, maybe at 100k miles or something. He also mentioned that our PCV system seams to do a really good job.

[Wires]

Awesome, thanks for that.

[BurrNinja]

One way to avoid valves from getting gummed up installing a catch can will help significantly.

[WrxToBeamerGuy]

Originally Posted by BurrNinja

One way to avoid valves from getting gummed up installing a catch can will help significantly.

People who have installed catch cans on our cars basically never "catch" anything. Even after thousands of miles.

[BurrNinja]

Originally Posted by WrxToBeamerGuy

People who have installed catch cans on our cars basically never "catch" anything. Even after thousands of miles.

Gives that piece of mind that nothing will go through.

[Mr. 340]

Originally Posted by WrxToBeamerGuy

People who have installed catch cans on our cars basically never "catch" anything. Even after thousands of miles.

I have a catch can and it's always empty. I have seen a drop or two come out. I would only run a catch can if I have a built engine or running big boost.

[kern417]

thanks for the tag. yes, B58s don't seem to have a lot of blowby. That's why your catch cans are almost always dry. it's a good thing. it means that your engine is healthy and well designed with tight clearances.

that might change as more get to higher mileage but i have yet to see any with gummed up valves like older engines. the one i referred to specifically on my stream was trevor (owner of bimmerboi performance) and he replaced his intake manifold around 60-80k miles i believe. he posted pics of his valves showing that they were basically spotless.