The glass beads breakdown as they hit the surface. As a result, fine pieces of glass can become trapped in areas such as threads, oil passages, intake runners, and exhaust ports. Sometimes it is very difficult, if not impossible, to insure that the head has no particles trapped in it after blasting with glass beads. Of course these fine glass particles can cause havoc, and potentially ruin an expensive motor. Soda blasting cleans aluminum cylinder heads , and other engine parts , just as well as glass beads, but without any chance of harmful media retention.
When the soda blast media hits the surface, it also shatters and breaks down into a fine dust, like talcum powder. This eliminates the potential for any media retention.
It also does not change any dimensional characteristics of the part being soda blasted. It is the best blasting method available for this type of work. In addition to cleaning cylinder heads , soda blasting is also commonly used for cleaning carburetors , pistons , connecting rods , and other engine components.
Various types of aluminum casings and housings , such as those found on some motorcycles , are perfect parts to clean by soda blasting. There are a number of other popular applications for a soda blasting cabinet.
Cleaning various types of pumps and electric motors are very popular uses for a soda blasting cabinet. Soda blasting does not harm bearings , seals , or windings , so many different kinds of parts can be effectively cleaned in a soda blasting cabinet without harm. A new and growing application is soda blasting parts and prototypes made with 3D printers , to give a consistent finish to the parts without changing dimensional characteristics.
Then before assembling the haeds I wash them out good with solvent and hot water, flipping them a few times. Then blow them out good again with air, flipping them a few more times. Dyce , Feb 14, Joined: Dec 24, Posts: 3, Profile Page. Bucksnort , Feb 14, Okay to hit machined surfaces? Joined: Oct 10, Posts: 1, Profile Page. Artfrombama , Feb 14, Joined: Aug 3, Posts: 2, Profile Page. CutawayAl , Feb 14, I asked them to hot-tank the head to clean it.
I wasn't thinking Instead they sandblasted it, then machined the mating surface flat as I'd asked them to do. The head looked great and certainly was squeeky clean, inside and out. Posted 06 March - PM i have blasted heads before and would say that so long as the head isnt warped then a light blasting will do no harm the head wont seal anyway if warped ,it is the valve seat areas and the valve guide internal diameter that shouldnt be blasted as the valve seats are lapped in for a good metal to metal gas seal and blasting would destroy the finish ,as a gasket is used to seal between the head and block the minute indentations caused by blasting would easily seal up with the gasket.
Local Club:. Posted 06 March - PM I stripped my cylinder head and then had it sand blasted. Then before fitting it having it skimmed to ensure i smooth surface with the black. Speedracer Hap Waldrop. I use fine glass bead with a small amount of aluminum oxide mixed in. On the cylinder heads, to get all the media out, I first blow with compressed air, then dunk and drain in the parts washer a couple of times to get all the remaining media out of the nooks and crannies, then wash with hot water then blow dry, then hit with WD With aluminum parts the WD40 is optional, as you don't have to worry about flash rust.
Acme Speed Shop www. Re: best material to blast cylinder heads, manifolds clean 3. In reply to by Speedracer I use fine glass bead with a small amount of aluminum oxide mixed in. Re: best material to blast cylinder heads, manifolds clean 4. Almost any sort of media blasting that can clean rust off will also pit a machined surface. Re: best material to blast cylinder heads, manifolds clean 5. In reply to by trevorwj Almost any sort of media blasting that can clean rust off will also pit a machined surface.
Re: best material to blast cylinder heads, manifolds clean 6. In reply to by Yankeedriver In reply to by Speedracer I use fine glass bead with a small amount of aluminum oxide mixed in. Re: best material to blast cylinder heads, manifolds clean 7. I started out using play sand, ditched that early due to health considerations. Switched to aluminum oxide still always using a respirator. I never do internals, just externals.
Really gets into the nooks and crannies. But as Hap say's with any media -clean, clean,clean. I was still getting media out of closed off screw holes. Had to dig it out with picks, more hot soapy water and a compressed air blow-out.
I use Remoil instead of WD40 as insurance against flash rust. Spray on, wipe off.
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