Here’s some pics of an aluminum gasoline powered cylinder head & a compacted graphite iron diesel powered cylinder head we cleaned & machined. The aluminum cylinder head was surfaced with a cutting insert that we use that is specifically tailored for creating the proper surface finish on aluminum cylinder heads & blocks. The Perkins diesel head however is made of a special iron alloy that requires a completely different cutting insert as well as a very specific feed & speed in order to achieve the proper surface finish.
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