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Old 05-25-2009, 02:24 AM   #1
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Valve adjustment hydraulic roller
I built a vortec 350 for the 85 iroc. I adjusted the valves with the motor out of the car. When i adjusted them, i tightened the rocker nuts while turning the pushrod until i felt some tension build then i proceeded another 1/2 turn. When i fired it up for the first time, it fired instantly and ran smooth. Do i need to readjust the valves after its supplied a sufficient amount of oil to all parts of the engine?
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Old 05-25-2009, 02:51 AM   #2
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Re: Valve adjustment hydraulic roller
That why you give it a 1/2 to 3/4 additional turn.
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Old 05-25-2009, 10:40 AM   #3
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Re: Valve adjustment hydraulic roller
That 1/2 turn past zero lash is the required preload. That's all the adjustment they require. If they need additional adjustment, something is wrong.
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Old 05-25-2009, 11:01 AM   #4
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Re: Valve adjustment hydraulic roller
Is it a Hyd roler cam? If so theres a procedure that might help out some. It's not really needed but it can reclaim a couple HP.
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Old 05-25-2009, 11:01 AM
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