11. Other developments applied to the Engine included tappets on the moving vertical plug rod. 12. It operates in a similar manner to tappet locking except that the blades are curved. 13. The remained signal boxes use 5-bar tappet locking frames dating from the 1930s. 14. All engines were now SOHC crossflow designs with a breakerless ignition system and hydraulic tappets . 15. Compared to the M21 the M51 has now tappets and a hydraulic valve lash adjustment. 16. A much-improved system placed the shims " above " the tappet . 17. :: I really doubt that the Tappet brothers would have much of a clue. 18. The camshaft operated the valves via hydraulic bucket tappets ; valve clearance adjustment is automatic. 19. They have a DOHC valvetrain configuration with hydraulic tappets , driving four valves per cylinder. 20. To provide long opening times, the bash valve normally incorporates some form of tappet mechanism.
