The surface texture of a cast engine is quite porous. It may be difficult to blast all the way into the pores and pits of the casting. Another alternative is chemical rust removal, like what is used on body panels. The advantage of this process is removal of the rust inside the water passages. I have asked one of these shops this question before. They usually charge a few hundred bucks for a complete and disassembled engine.
Dave Homstad
56 Dodge D500
-----Original Message-----
From: Dave Stragand [SMTP:dave.stragand@xxxxxxxxxxx]
Sent: Monday, July 19, 1999 4:27 PM
To: L-FORWARDLOOK@xxxxxxxxxxxxx
Subject: Re: [FWDLK] blasting the engine
Richard Finch wrote:
> I want to blast the engine in order to get a good surface to powder coat the
> block and heads outer surfaces. Due to the HIGH RISKS of motor blasting I
> am thinking that plastic beads would be the best media to use. Does anyone
> have any experiences with this? Anyone recommend a different media?
I understand crushed walnut shells are excellent for motor work, as they will
degrade very easily in motor oil and be flushed away without damage. I believe
Eastwood sells them for this purpose. However, I haven't had any experience
with them personally.
-Dave
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