Tutorial: How to make engine part 40
4 Answers

Exhaust Valve Retainer
Answered with a tutorial: https://grabcad.com/tutorials/tutorial-how-to-make-engine-part-40

exhaust valve seat
Answered with a tutorial: https://grabcad.com/tutorials/tutorial-how-to-make-engine-part-40--1

Intake Valve Retainer
Answered with a tutorial: https://grabcad.com/tutorials/tutorial-how-to-make-engine-part-40--2