Chevy Camaro LS3 V8 Engine - printable valves, lifters + N20 mini motor holder

Why:
I have a lot of troubles with getting all the parts needed for making this engine. Moreover, some parts just does not work very well, causing mechanism destruction.

I'm sharing modified parts that allowed me finishing that project. Hope they will help you too :)

Items I've modified:

• Added a simple stand for engine - I didn't wanted to use any oil pans and magnets
• Added modified starter engine gear and holder for the smaller DC motor
• Fully printable valves - you still need springs though
• Fully printable lifters
• Modified cylinder head for the items above
• Smaller piston heads + modified piston rod

Tools I've used:

• 12V DC N20 Mini Metal Gear Motor with Gearwheel
• Mini 12V PWM controller
• Female square DC 2.1mm plug
• 1A 12V power supply with 2.1mm plug
• M3 threading tool - for screwing rocker arms into position without the need of metal inserts

Video preview: https://youtu.be/r-mgdL-tw2c

IMPORTANT NOTES:

1.  If the part is not present in my files, it is in the original model: https://www.thingiverse.com/thing:1911808
2. This model does not have good documentation (nor does the original model); some things are made through trials and errors. If you are a beginner in 3D printing, bear in mind that you will need some weeks (or months) to complete it.
3. The original model has a parts list; you need to find a good, cheap, and reliable source of materials (some ideas: eBay, Amazon, AliExpress, local stores, or online sellers).