Turd Polishing

[borat]

Looks like some metal was removed in the second image. Top fins look thinner.

As previously mentioned, I'd get a couple different size small wire wheels and go at it with that.

 

[Gushh]

If you rush it you'll lose a lot more material than you should have. Wrong media, too much pressure, too long on the same spot.. bad bad bad.

A more sane alternative is an ultrasonic bath, some big car shops will have one specially those involved in rebuilding engines

 

[Tzed250]

Looks like some metal was removed in the second image. Top fins look thinner.

As previously mentioned, I'd get a couple different size small wire wheels and go at it with that.

If you are talking a out my post, the fin dimensions are unchanged. That is less than 3 minutes in a blast cabinet. I work inside of .001" regularly. A wire wheel will remove 100 times the amount of material glass bead blasting will. The only thing a wire wheel is used on in our shop is heavy scale/rust removal. Glass bead blasting is used for all precision work in the electrical and gearcase rebuild shops.

Edit: After further examination, those are two different cylinders that I was working on at the same time. The top one is a Stihl, the lower one is a Mahle. This would account for the difference in fin appearance.

 

[nmurph]

Glass bead blast.


066 cylinder by zweitakt250, on Flickr

Working in a heavy equipment rebuild shop I get to polish turds all the time..

John, it looks like you got a little aggressive and blasted the decomp plug to smithereens.

 

[Tzed250]

John, it looks like you got a little aggressive and blasted the decomp plug to smithereens.

I knew I shouldn't make those decomp plugs out of butter icing.

 

[stihlonlynow]

There's no reason to toss that, when you can get it blasted.

I agree.

 

[LegDeLimber]

Ditto on the glass beading (spent some in a steering gear rebuild shop)
Just Would want to see how the bonding of magnets looked.
maybe put a couple layers of tape or something on the laminations
and then snug up the flywheel nut, then turn engine to see if any of them scrape.
?*might* indicate a bit of festering behind one.