I think of myself as a very visual thinker, but I actually cannot form conscious images in my head. This seems like a contradiction, but it's true anyway.
I do have a very good spatial reasoning sense though - like you, I can think of a V8 engine in my head, all the pieces, how they fit together and move, but I'm not really forming a picture in my mind - it's more like I'm thinking about the 3d shapes themselves and how they interact, but if I try to consciously form a picture, it just disappears. If I back off, think about how the mechanisms work without trying to form a conscious picture, then it's all there. But not really as a picture - it's something else - a sense of shape.
It's actually hard to talk about because English doesn't include words for what exactly I'm doing when I'm reasoning spatially, and as any images fade when I think about them too consciously, I'm not even quite sure myself.
The one exception is when I'm lucid dreaming half-way through waking in the morning - then for a while I can see everything perfectly. As soon as I fully wake, that ability disappears. I love lucid dreaming when I'm working on a difficult 3D CAD problem.
I do have a very good spatial reasoning sense though - like you, I can think of a V8 engine in my head, all the pieces, how they fit together and move, but I'm not really forming a picture in my mind - it's more like I'm thinking about the 3d shapes themselves and how they interact, but if I try to consciously form a picture, it just disappears. If I back off, think about how the mechanisms work without trying to form a conscious picture, then it's all there. But not really as a picture - it's something else - a sense of shape.
It's actually hard to talk about because English doesn't include words for what exactly I'm doing when I'm reasoning spatially, and as any images fade when I think about them too consciously, I'm not even quite sure myself.
The one exception is when I'm lucid dreaming half-way through waking in the morning - then for a while I can see everything perfectly. As soon as I fully wake, that ability disappears. I love lucid dreaming when I'm working on a difficult 3D CAD problem.