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Jack Zimmerman · 08-18-2021, 02:45 PM

On my iron heads, bead blasting them in my blast cabinet with walnut shell media works pretty well in the exhaust ports and the other nooks and crannies, etc. as long as the heads are completely disassembled such that you can wash out all of the media with a garden hose and compressed air when you're done. And I've cleaned other aluminum parts with walnut shells as well and they don't change the surface finish at all so I'm guessing that they would work well and be OK on a cylinder head. But you should probably try it on a non-critical area first and start with a relatively low pressure. And if you are not aware, Harbor Freight has the walnut shell media if you need some.

08-18-2021, 02:45 PM	#8
Jack Zimmerman Junior Member Join Date: Dec 2001 Location: Clemmons, NC Posts: 34 Likes: 0 Liked 10 Times in 5 Posts	Re: Cleaning an aluminum head On my iron heads, bead blasting them in my blast cabinet with walnut shell media works pretty well in the exhaust ports and the other nooks and crannies, etc. as long as the heads are completely disassembled such that you can wash out all of the media with a garden hose and compressed air when you're done. And I've cleaned other aluminum parts with walnut shells as well and they don't change the surface finish at all so I'm guessing that they would work well and be OK on a cylinder head. But you should probably try it on a non-critical area first and start with a relatively low pressure. And if you are not aware, Harbor Freight has the walnut shell media if you need some.