Media Blasted Aluminum Heads

[ht89]

I got my heads back from the machine shop and was surprised to see that they had been blasted.
It's the first time I've had aluminum heads redone by a machine shop... is this normal?

 

[andy396]

I can’t speak to what is normal, but what specifically did they do of concern during the process of media blasting them?

 

[Hipster]

Idk, A shop I use that has done quite a few for me refuses to blast anything where media can get into internal passages. He has charged me a small fee for blasting coked up valves when I've brought him your basic street beater, just get it together, valve job but he won't blast a head or intake to make it pretty.

 

[GarrettGmc]

The engines I work on if the heads are good just built up carbon we'll blast them to clean everything then lap the the valves in. Did you ask the shop if that's something they do all the time or if they saw something?

 

[454cid]

I had some heads gone through a few years back and the shop didn't want to blast them, but I don't recall their reasoning.

 

[ht89]

My heads were soda blasted and decked. Evidently it's the way to go.

You must be registered for see images attach

You must be registered for see images attach

 

[Schurkey]

Nice thing about soda blasting is that soda is water-soluble. Dunk the heads in a big bucket of water, soda washes away.

Gotta be more careful with glass bead, walnut shells, plastic media, etc.

 

[GarrettGmc]

We glass bead then run through parts washer before hand washing an hosing out. I'd prefer to soda but I'm not the manager so oh well