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Old 05-07-2009, 01:38 PM
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Quote:
Originally Posted by Custom10
I would have thought that the preload would increase on warm up due to expansion of push rods an other connected components? The noise I am experiencing actually decreases when I set the rockers 1/4 turn past zero rather than 3/4 or 1 full turn. Just me thinking out loud but if the XE cams ramp rate is such that it is setting down the valves very quickly as well as opening them quickly then on closing with less preload the hyd lifter would have a better chance of providing some cushioning. That is why my chatter decreases with less preload?

the head and block are MUCH hotter than the push rods

And you may have problems from too much preload, try it with 1/8 turn and see what happens. I've set them with DNN when the engine was hot.
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