Suggestions needed for adjusting hydraulic roller lifters

I have been adjusting the lifters on a Pantera and all is well until the car is driven for about 15 minutes. Once it is up to temperature, you can hear that one or more lifters are loose. It sounds perfect for the first 15 minutes or so. Once it cools down a little it sounds fine again. I am currently at 1 turn of preload on the 7/16 studs. It looks like one or more of the lifters needs additional preload. Please let me know if you have any suggestions.

2/25/2011:48 AM

Original Post

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