Carbon build up in intakes

[Begbie712]

Hi Everyone,

I'm interested to hear what others do to remove the carbon build up in the intakes and on the intake valves on their Direct Injection motors?

Does anyone have their intake walnut blasted, or do they manually clean the intakes, or use any chemical products?

I'm a newbie 335i owner and I have seen the YouTube videos on the subject and was wondering what local owners do to solve the problem.

Is it advisable to remove the EGR to prevent or minimize the issue after the intake is cleaned.

Apologies if this question has been asked and answered in a separate thread.

 

[Twinz]

Walnut blasting is a must on the 335i. Port injection keeps it from building up and to a small extend meth injection slow it down a little but start with a walnut clean and the car will perform better after that.

EGR is found on diesel cars and removing it when the car is old together with swirlflaps is a good decision.

 

[Begbie712]

Walnut blasting is a must on the 335i. Port injection keeps it from building up and to a small extend meth injection slow it down a little but start with a walnut clean and the car will perform better after that.

EGR is found on diesel cars and removing it when the car is old together with swirlflaps is a good decision.

Thanks Twinz. Anyone know who does walnut blasting in the Cape Town area?

Sent from my JNY-LX1 using Tapatalk

 

[CA_130]

Anyone know who does walnut blasting in the Cape Town area?

Racing Teknik, they do injector cleaning and refurb as well, they are somewhere near the airport iirc. They have an FB page where they post some of their work and results you can check out.

 

[Preggie Naidoo]

Hi Everyone,

I'm interested to hear what others do to remove the carbon build up in the intakes and on the intake valves on their Direct Injection motors?

Does anyone have their intake walnut blasted, or do they manually clean the intakes, or use any chemical products?

I'm a newbie 335i owner and I have seen the YouTube videos on the subject and was wondering what local owners do to solve the problem.

Is it advisable to remove the EGR to prevent or minimize the issue after the intake is cleaned.

Apologies if this question has been asked and answered in a separate thread.

Hi,
Have 2007 E92 335i and had SMG Tygervalley do this three years ago. They arranged to bring BMW's machine through from PTA. Speak to Walter- top guy!

 

[helly544]

I had pretty severe carbon buildup in my intake manifold as I've got a high mileage 320d, it was about 3-4mm thick

I removed the manifold, dismantling all the components (Swirl flaps, EGR, etc), everything that was electronic was put aside and then I placed all the components into a large plastic tote, added boiling water and causing soda, then left it for a few hours. Once the water is luke warm, put on some thick chemical proof gloves and start pulling the components out, rubbing off any residual carbon as you spot it. Rinse thoroughly with cold water and reassemble.

Caustic soda will burn your skin, so gloves are essential, if you get any on your skin you can pour a little vinegar on the area to neutralize the acid and then rinse with cold water.

 

[osiris]

I did a Wallnut blast back in 2017, My valves were caked badly.
Last year I installed port methanol injection but had been running charge pipe methanol injection a year or so prior to that, This year I dismantled everything to check things out and clean nozzles etc and my valves are still perfect. Port methanol will keep your valves clean if you wallnut blast the gunk away to begin with.

I don't think you will need another wallnut blast in the future if you install port methanol injection after the wallnut blast has been done., it basically chemically steam cleans your engine every time it sprays.

Also port methanol injection is a good safety net for our motors due to how bad our south African fuel is, so its a win win situation.

 

[Salt]

I had pretty severe carbon buildup in my intake manifold as I've got a high mileage 320d, it was about 3-4mm thick

I removed the manifold, dismantling all the components (Swirl flaps, EGR, etc), everything that was electronic was put aside and then I placed all the components into a large plastic tote, added boiling water and causing soda, then left it for a few hours. Once the water is luke warm, put on some thick chemical proof gloves and start pulling the components out, rubbing off any residual carbon as you spot it. Rinse thoroughly with cold water and reassemble.

Caustic soda will burn your skin, so gloves are essential, if you get any on your skin you can pour a little vinegar on the area to neutralize the acid and then rinse with cold water.

I am considering taking my F30 320d to Carbon Doctor for the wall nut blasting this year as a maintenance task. Can I ask how many km's you had on your 320d when you did the carbon cleanb?

 

[Dax]

I had my car done back in 2019, one of the first things I did.

BMW N54 135i + 127 000km

 

[helly544]

I am considering taking my F30 320d to Carbon Doctor for the wall nut blasting this year as a maintenance task. Can I ask how many km's you had on your 320d when you did the carbon cleanb?

It was ±290 000km's at the time, my engine is the N47T, which has a revised intake manifold, swirl flaps, and a few other bits that addressed the issue's found in earlier N47 engine's

 

[Salt]

Thanks appreciate the feedback. I know Carbon Doctor does the 320d motors know. I know they didn't do them some time ago but they have the process right to open and clean now. About R4k. I am considering getting mine done this year.