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05-07-2006, 09:20 PM | #1 |
Registered Member
Join Date: May 2006
Posts: 3
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Hydraulic Lifter Preload Trouble on 68 289
I've gone through the process of setting the lifter preload on my 68 289 a couple of times as I hear some valve tap. Every time after going through the procedure, the engine runs rough and I end up backing off on the preload. The engine smooths out once the lifters get back to zero preload for some reason. I've tried 1/8, 1/4, 1/2 and 3/4 turn preload settings, all with the same result. It barely ran at the 3/4 turn setting. I determined #1 cylinder TDC by the rotor position, and found the pushrods with no preload so its likely I'm in the right position.
Could there be a problem with the lifters themselves? Could this be a valve issue? Any help would be appreciated. |
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