|
Adjusting Hyd Valve lash
Question: On a fresh rebuild do you adjust the Hyd valves with them dry or with oil pressure? :rolleyes: I would think it is with oil pressure. Note: I will build the oil pressure by priming the oil pump, not starting it.
Thanks |
Both.
Set them dry and then run them again when you get the engine hot and run it for a bit. The procedure is the same for both dry and under pressure. Adjust so that there is zero lash, then crank about another 1/2 turn into it. Note that some people think that you can't turn the pushrod when you've achieved zero lash. That's not true...you're looking for no axial movement at this point. |
FWIW-
I attempted to set the lash on my hydraulic roller lifters after I preoiled the motor (new build) and had trouble with some lifters not bleeding down. I'm not sure what caused this...maybe some assembly lube that I put on the ends of the pushrods got into the lifters and gummed up the works...I don't know...but I had to pull my intake. Not fun. Needless to say, I set my lash prior to preoiling and avoided assembly lube on the pushrods (just motor oil). phil |
Quote:
I run the nuts down by hand, not using a wrench. When I can't turn the nut by hand, that's zero lash. Then add 1/2-3/4 turn with a wrench. |
I set them before starting the motor(just as the others have advised), do a 15 to 20 break-in and then shut things down and let things cool off a bit......
I took an old factory steel valve cover years ago and cut out a strip about 2 inches wide in the top, the length of the valve cover. I then install this valve cover on one side, start the engine and begin re-adjusting each valve........First I loosen one nut at a time till I hear the valve "ticking" and then slowly tighten that one, when the "ticking" stops, I add 3/4 turn and go to the next one....... works like a charm, have one 351-W I did this on 6 or 7 years ago and the valve covers have not been off since........... David |
| All times are GMT -7. The time now is 07:01 PM. |
Powered by vBulletin® Version 3.8.0
Copyright ©2000 - 2025, Jelsoft Enterprises Ltd.
Search Engine Friendly URLs by vBSEO 3.6.0
The representations expressed are the representations and opinions of the clubcobra.com forum members and do not necessarily reflect the opinions and viewpoints of the site owners, moderators, Shelby American, any other replica manufacturer, Ford Motor Company. This website has been planned and developed by clubcobra.com and its forum members and should not be construed as being endorsed by Ford Motor Company, or Shelby American or any other manufacturer unless expressly noted by that entity. "Cobra" and the Cobra logo are registered trademarks for Ford Motor Co., Inc. clubcobra.com forum members agree not to post any copyrighted material unless the copyrighted material is owned by you. Although we do not and cannot review the messages posted and are not responsible for the content of any of these messages, we reserve the right to delete any message for any reason whatsoever. You remain solely responsible for the content of your messages, and you agree to indemnify and hold us harmless with respect to any claim based upon transmission of your message(s). Thank you for visiting clubcobra.com. For full policy documentation refer to the following link: