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Across 4. Precision measuring tool 6. Storage for oil 7. Open during the exhaust stroke 10. Sends an electrical charge to the correct cylinder 11. Link between the piston and the crankshaft 12. Cleans the oil 14. Used to insure proper sealing 15. Ignites the air fuel mixture 16. Used to operate the valves 18. Moves the pistons 20. Large gear 22. Lower removable half of the connecting rod 23. On an engine camshaft

Down 1. Diameter of the cylinder 2. Both valves are closed 3. Has rings 5. Casting that contains cylinders 8. Controls air flow 9. Quiet sounds of running engine 11. Replaced by fuel injection 13. Outer loweredge of valve head 14. Fuel 17. Used to force oil under pressure 19. Metal section bolted to top of block 21. The push rod sets on this