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Non adjustable valves/rockers. |
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Anderslober 
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Joined: 30-July-2019 Location: Denmark Status: Offline Points: 750 |
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 Topic: Non adjustable valves/rockers.Posted: 23-September-2022 at 7:37PM |
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Hi forum. The 351c is a non-adjustable design. Does this mean, that you ‘just’ install stock lifters/pushrods and torque rockers to spec….?….done?
No lashing/pre-load etc….? My engine is totally stock. I want to keep it this way.
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Rockatansky
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Joined: 30-July-2010 Location: On The Road Status: Offline Points: 5848 |
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Posted: 24-September-2022 at 8:14AM |
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rocker arm retaining bolt tq is 22 lb-ft IIRC you can shim the base of the pedestals to reduce and/or equalize lifter plunger preload. +/- length pushrods can also be used, again IIRC Ford issued +/- .060" pushrods. removing some material from the bottom of the pedestal can also be used to effectively increase lifter plunger preload if + length pushrods are not readily available
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72 GT Ute
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Billy C
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Joined: 10-February-2010 Location: Pittsburgh, PA Status: Offline Points: 946 |
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Posted: 24-September-2022 at 1:15PM |
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By design, the hydraulic lifters take up the slack and eliminate lash to keep the valvetrain quite, to an extent. Shimming and removing material is a good suggestion. Hydraulic valvetrains are kind of a set it and forget it type of deal. You shouldn't have to play the shim game very often if ever again.
On my big block I actually run the factory rockers on heads that were designed with pedestals for adjustable rockers. I made a bunch of slightly oversized spacers and filed each one to achieve the "lash" speced.
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-Billy Conturo
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72FordGTS
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GTS.org Admin Joined: 06-September-2005 Location: Ontario, Canada Status: Offline Points: 5449 |
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Posted: 25-September-2022 at 3:34AM |
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Let me know if you want the instructions from the Ford service manual.
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Vince
1972 Ford GTS Sportsroof - Survivor, One Family car GTS.org Admin |
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