The water passage’s six cores and internal design complexities offered a challenge to TEI and Honda engineers.


stages of the project, while the purchasing department remained relatively hands-off. “We started our dialogue with the engineering group, while keep- ing the purchasing people informed so there were no surprises,” John- son said. “When we have agreed


on a design and they are ready to deliver a 3-D model, that’s when the purchasing order comes out, so a lot of what takes place up to this point depends on a solid working relationship and trust.” For the water passage, Kahaian began working with a Honda


engineer who was less experienced with castings. Te two went back and forth on a half-dozen design revisions, dealing primarily with the transitions between bulkier sections and walls as thin as 0.118 in. (3 mm). Once TEI received the go-


The water passage required a number of design modifications for the many areas that transitioned from thin walls to heavier sections. 28 | METAL CASTING DESIGN & PURCHASING | Nov/Dec 2014


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