I don’t know of any tutorials specific to “engine modeling”. You could try some tuts on polygonal modeling and boolean technique. That gets you through many engineering oriented objects such as pistons, cranks, cylinder heads,etc.
Use 3D snapping settings to define a scale and tolerance.
Will you animate? If so, find some MOCCA tutorials, or, if you have Dynamics, some tutes on that as well.
Ditto with Pyrocluster for the sparks and smoke. But a basic engine should be no problem with the base package.
Primary System Info –
Mac Pro 2×3.2 Quadcore – 10.5.8 – QT 7.6.2 – 20 GB RAM – nvidia8800GT – SATA internal & external storage – Blackmagic Multibridge Pro (Not Functioning)- Open GL 1.5.10 – Wacom Intous2 tablet – AJA io