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