valve adjustment questions?
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Joined: Feb 2001
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From: atl
valve adjustment questions?
i am currently building a 460 for my truck and i was wondering what i have to do for adjusting the rocker arms. i know that i need to prime the engine first before i fire it, but do i need to have done this before i adjust the valvetrain? i've heard that i need to set the rockers(they are harland sharp 1.73 rolloers) to zero lash and turn another quarter turn. do i need to have the lifters pump up first? i am all sorts of confused, so any info would be greatly appreciated. thanks,
mike
mike
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Joined: May 2001
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From: Sherwood Park Canada
valve adjustment questions?
It should not matter one way or the other. If you prime up the engine it will have oil presure right away. Now if you were runing solid lifters I would set them looser rather than tighter. this way no damage could happen.
HAAKEYE snow fever for sledding but does like his trucks. Ran a 13.049 at 103 mph in my 1970 F100 ( Ground Pownder) 428scj 2/4 4speed. Yahoo messanger (haakeye50)
HAAKEYE snow fever for sledding but does like his trucks. Ran a 13.049 at 103 mph in my 1970 F100 ( Ground Pownder) 428scj 2/4 4speed. Yahoo messanger (haakeye50)
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Joined: Aug 2000
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From: PacNW
valve adjustment questions?
Make sure the rocker you're adjusting is on the base circle of the cam. Tighten the rocker down until there's no up & down play in the push rod (zero lash) then go another 1/4 - 1/2 a turn more so it compresses the lifter assuming they're hydraulic. You don't need to prime the engine first. Repeat the process for each rocker by following the firing order of the motor or you can bring #1 cylinder to TDC on compression stroke then adjust #1 I & E, #7 I, #5 E, #8 I, #4 E. Then turn the crank 180 deg and adjust #5 I, #2 E, #4 I, #6 E. Then turn the crank 270 deg and finish with #2 I, #7 E, #3 I&E, #6 I, #8 E.
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