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steven28047 steven28047 is offline
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Wink Trying to clean intake valve - 11-15-2014, 04:52 PM

I've been reading about walnut shell blasting as the method of choice for intake cleaning. Are there easier ways to accomplish this?

Seafoam usage is not effective from what I've read. Pushing the engine and running it at a high temperature may help according a post.

Then, I'd seen a youtube video where a guy pours water into the engine with a garden hose and claims it is safe and it will remove carbon deposits. Is that really possible? Then, can I SPRAY some distilled water thru the charge pipe to accomplish the same? Will that work? There were some anecdotal evidence that spraying water or methanol will keep some of the valves clean--owners with meth injection.

If not, I might shred some dollar bills and blast it thru the intake valve. May cost about the same and safer than the hard shell.
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alpinedevil335 alpinedevil335 is offline
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Default 11-15-2014, 06:40 PM

No no no..
Walnut blast or manually cleaning them with brushes is the only effective way.
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Cerbera Cerbera is offline
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Default 11-16-2014, 10:12 AM

stiff brushes, carb/intake cleaner and an airline + a bit of patience
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e90man e90man is offline
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Default 11-17-2014, 11:22 AM

Download the DIY instructions and get the tools you need at www.bimmerhelp.info
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japeatr japeatr is offline
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Default 11-17-2014, 11:41 AM

i use this
http://www.harborfreight.com/21-oz-h...gun-95793.html

with some very fine crushed walnut from the pet food store
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Vertigo Vertigo is offline
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Default 11-19-2014, 10:41 AM

It's really not that bad. The first time you do it expect it to take about 6 hours start to finish. After doing several of these I can now do it in under 3.5 hours. Just make sure the valves are shut on the cylinder you are cleaning if that wasn't already obvious.


2008 335i stock
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kenjermen kenjermen is offline
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Default 12-17-2015, 10:38 PM

If you have time and it's not the only car let the closed valves sit in brake cleaner to loosen up the hard carbon then blow the brake cleaner out with a rag and air hose. After that it'll make the walnut blasting process faster and a lot easier.


2009 BMW 335I with: MHD/Haltech,
precision 6870 turbo, jp Workz header,
Wagner EVO II intercooler,HKS exhaust with cutouts, stage 3 lpfp, wavtech lsd, eospeed intake manifold with fuel return and 60lb injectors
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dawhiz dawhiz is offline
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Default 02-10-2016, 12:47 AM

Do not pour water into your engine. It will also do nothing at all in terms of cleaning or removing or anything. That stuff is gunked on where you can let it sit in pooled carb cleaner and it will only make the top most layer easier to get off for you to only return for another pool of carb cleaner. Repeating that makes it easy. That's with the correct tools and using walnut shells lol
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steve70 steve70 is offline
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Default 08-07-2019, 06:03 AM

thanks for this info i will do it and start a new thread about it

Last edited by steve70; 08-07-2019 at 06:03 AM.. Reason: spelling
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