How to Clean Carbon Build up from a Plastic Intake

How to clean carbon build-up in a plastic intake. Depending on the engine design, its condition, and maintenance history, this will affect how much carbon build up inside the intake. For this I am using my 2010 BMW 335d as an example and unfortunately this particular engine, the M57 is known for having this problem. With plastic intakes, you’ll need to be extremely careful not to damage the intake where you risk jeopardizing its durability such as using harsh chemicals. Plastic intakes also cannot be exposed to any media blasting either. #turnermotorsport #oemtools #bmwm57
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Tools/Supplies Needed:
-citrius degreaser
-hot water
-big bucket
-dull/worn standard screwdriver
-round brushes
-required tools for removal
-new gaskets
Chapters:
00:00 Intro
00:20 Removal Overview
01:10 Stripping Down the Intake
03:54 Basic Cleaning
04:20 Deep Cleaning
05:51 EGR Valve Cleaning
06:22 Reassembly
Procedure:
Once that intake has been removed, now is further disassembly. All the old gaskets, fasteners, clips, sensors and any other components will need to be removed. The intake should be stripped down to only the intake and no other components.
Using a worn standard screwdriver with no sharp edges, scrape out as much of the build-up as possible from the intake. This will help with the cleaning process and allow the cleaner to bite in quicker. Simply rotate the screwdriver around inside the holes and then wipe on a paper towel.
I have a garbage can filled with some hot water. I boiled water using my propane heater with a pot. A citrus cleaner is then dumped into the water, this is a concentrated cleaner that mixes with the water.
To provide some agitation for the intake, I’ll stick a hose inside the intake connected to an air valve, which was running at about 5 psi from the air compressor. Eventually more water was added to the intake so it was fully submerged.
The intake is soaked for about three hours, this will depend on the severity of the buildup. The intake was then removed, and the pressure washer was used to wash out any softened build-up inside. make sure you are doing this in an area where you don’t stain any surrounding surfaces.
If you do find the is some buildup left over, use a round brush to clean the inside of each of the runners. A popsicle stick can also be used to help scrape away any residue inside. The intake, and then be soaked again or you can spray cleaner inside each of the runners.
A pressure washer is then used again to wash out the intake runners when washing out the intake make sure you don’t get any dirt inside the intake runners which can cause damage to your engine.
As for the EGR assembly, use a doll standard screwdriver to scrape away any residue on the inside. Use brake cleaner to wash away the remaining residue. A toothbrush can also be used to help agitate the surface. Again wash away any remaining residue with the brake cleaner.
Swirl flap caps are then installed along with the actuator. These caps are only intended for off-road use. This is not a street legal modification, this goes against laws that no longer make the vehicle fit for the road.
The gasket surfaces are cleaned with a paper towel to ensure there are no contaminants that may cause sealing issues. The newly supplied gaskets from Turner Motorsport is then installed. These gaskets simply fit into a groove, they’re held into place so there is minimal risk of them falling out during the installation.
The gasket surfaces on the engine were cleaned using a cloth with brake cleaner. This will remove any built-up residue which could potentially cause sealing issues. If you do find any hard surface imperfections or built-up debris, green scotch-brite can be used for this.
After that is installing everything in reverse of removal.
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© 4DIYers 2013
All Rights Reserved
No part of this video or any of its contents may be reproduced, copied, modified or adapted, without the prior written consent of the author.

[@davelowe1977]

I have an F30 335d. I think I'm going to need this video soon !

[@4DIYers]

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[@asmircar1]

Block that egr

[@WhiteCheddar.]

What does that mean?

[@adambennett2176]

How much would it coast to just buy a new one??? 🤔

[@4DIYers]

Around $1300 for this engine.

[@damian1860]

Do you have any way to clean the channels in the cylinder head without using specialized tools?

[@Aesthetics622]

Picks and brushes my man it’s gonna be your best bet with vacuum if possible

[@aqib2000]

@@Aesthetics622best bet yet you can’t see f All On the M57

[@AusNav09]

Zip ties cut an stuffed into a drill. Rotate crank to keep valves closed. Use with carb cleaner or alcohol. Avoid the valve stem seal.

[@armenianman5826]

Thank you for your great video. I drive 1999 323i 4 door automatic. I kept my intake manifold in purple power more then 18 hours, plus another 10 more hours in plastic container. After I was trying to use with high pressure wash at gas station. When I came back home I put my finger to one of the port of my intake manifold and I got shocked because the deposit is still there. I can grab the deposit with my finger nails. Maybe I better use baking soda and vinegar.

[@4DIYers]

How concentrated was your mixture?

[@aqib2000]

What worked I’ve been struggling with mine too!