Translations:Engine Block Tutorial/55/en

Now we are closing in on the final design of the engine. Return to the Part workbench and click the Extrude sketch button. In the combo box that pops up, use CTRL+LeftClick to select the 6 head bolts and the spline curve for extrusion. The default direction is the positive Z axis, we want the negative Z axis to extrude the head design "down" and into the engine block so set the direction to X=0, Y=0 and Z=-1, then type in 110 for the length (the height of the engine block). After you get all the values entered and click OK the circles for the bolts will be extruded downward to for cylinders and the spline will be extruded downward to produce a sort of cylinder with "rippled" edges. Select and hide the Bored block so you can see the extruded spline, then hide that object so you can see the 6 head bolt cylinders. You see that very sophisticated 3D shapes can be made by starting with a 2D drawing and extruding parts of it downward. We could even extrude different parts of the drawing by different amounts to do things like bore in bolt holes that just go part way through the block, but cut separate water jackets that go all the way through. At this point all your extruded objects are just named "Extrude001..." so you will want to go through and name each of them so you can identify them in the next section (I will name mine Head bolt bore 1 though 6 and name the spline Extruded spline, I suggest using the same names in your model as well). Now that you have your extruded shapes it is just a few boolean operations now to produce the final block design. Go through and show the major components (the Bored block and the Crankcase), and all your newly created extruded objects.