335 Series Engine Forum - Non adjustable valves/rockers.

Print Page | Close Window

Non adjustable valves/rockers.

Printed From: The Ford Torino Page
Category: Powertrain Specific Forum
Forum Name: 335 Series Engine Forum
Forum Description: 351C, 351M and 400 engines
URL: https://forum.grantorinosport.org/forum_posts.asp?TID=20405
Printed Date: 17-April-2024 at 11:16PM
Software Version: Web Wiz Forums 12.06 - https://www.webwizforums.com

Topic: Non adjustable valves/rockers.

Posted By: Anderslober
Subject: Non adjustable valves/rockers.
Date Posted: 23-September-2022 at 7:37PM

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.

Replies:

Posted By: Rockatansky
Date Posted: 24-September-2022 at 8:14AM

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

-------------
72 GT Ute

Posted By: Billy C
Date Posted: 24-September-2022 at 1:15PM

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.

-------------
-Billy Conturo

Posted By: 72FordGTS
Date Posted: 25-September-2022 at 3:34AM

Let me know if you want the instructions from the Ford service manual.

-------------
Vince

1972 Ford GTS Sportsroof - Survivor, One Family car

GTS.org Admin