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Old 06-17-2005, 01:22 AM
Ken Nerlove Ken Nerlove is offline
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Valve adjustment 351 c

What is the proper procedue for adjusting the valves on a 351c with crane roller rockers? I have heard various different ways to do it. I believe the best way is to put the cylinder on TDC, turn the adjuster down until snugg, then 1/2 turn more? My understanding is that the location of the lifter on the cam lobe is critical. How do you know when the position is correct so you can do the adjustment (whatever that is) Do you have to do each cylinder individually or is there some sort of system that you can follow? Any info would be appreciated.
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Old 06-17-2005, 01:26 AM
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monsterbaby monsterbaby is offline
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Well I believe the one I have heard the most is when the exh starts to open adjust the intake, when hte intake starts to close adj the exh, personally I tend to bring the cyl to about 20 deg before tdc on it's fire cycle, and adjust both valves.
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Old 06-17-2005, 07:59 PM
tastyklair tastyklair is offline
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Monsterbaby is right about the intake closing, exhaust opening part. Crane has a tech article on their website which explains the whole process.
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Old 06-20-2005, 10:55 AM
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Bill_Beyer Bill_Beyer is offline
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Here, this may be easier than trying to find it:

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, #4 I, #3 E, #8 I, #7 E. Then turn the crank 180 deg and adjust #3 I, #2 E, #7 I, #6 E. Then turn the crank 270 deg and finish with #2 I, #4 E, #5 I&E, #6 I, #8 E.
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Old 06-20-2005, 10:55 AM
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Go Back   Ford Truck Enthusiasts Forums > Performance, Engines & Troubleshooting > 335 Series- 5.8/351M, 6.6/400, 351 Cleveland

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