Air Engine V2 for Building Blocks

You can view the engine construction here: 

This is V2 of my air engine design. This model is designed to work with ‘building brick’ parts, turning a standard engine cylinder into a working air-powered engine. 

Once printed, you'll need to take these steps to get the engine working:

• Remove support material
• File/sand the parts of the valve housing and sealing cap that will touch each other to get rid of any excess support material. 
• Check that the piston head travels smoothly into the cylinder. If there's any friction, gently sand the piston head.
• Insert the two o-rings around the piston head (9mm x 7mm x 1mm o-rings), and sealing cap (14mm o-ring) (3 o-rings total).
• Drill 2 exhaust ports into the ‘building brick’ engine cylinder, just below where the piston's o-ring travels at the bottom of the stroke (you can refer to my video on YouTube).
• Superglue the valve housing to the top of the engine cylinder.
• Take the small printed leaf, and place onto the sticky side of the two-sided rubber sheet (1mm thick, with one sticky side). Ensure the smooth rubber side is facing down onto the hole in the valve housing.
• Superglue (very small amount) the tip of the valve leaf to the valve housing.
• Use two M3 bolts to secure the sealing cap to the valve housing.
• Connect some 3mm (inner diameter) pneumatic hosing from the valve to an air supply.
• Assemble the ‘building brick’ engine using parts to fit your needs (you can use my YouTube video as reference).
• Lubricate the piston head for smooth operation

Works on pressures higher than ~20 PSI.