Setting Lifter Preload - Roller rockers - ClassicOldsmobile.com


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Old April 17th, 2018, 12:28 PM   #1  
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Setting Lifter Preload - Roller rockers

So Ive read quite a few different methods of doing this. EOIC, etc. But my question to those whove done this is what is the simplest way of doing this procedure? Meaning the least revolutions of the crank and cam.

Ill add that the guide plates arent adjusted yet, so Id like to add that adjustment into the work flow. I know we shoot to adjust when the lifter is on the base circle. So my question is whats the most efficient way of getting there.

Im working with flat tappet lifters (dry, not pumped up), 7/16 stud with polylocks, 1.65 stainless roller rockers.

I am getting the right rocker geometry with 2.8 turns of the polylock. .050 per turn with 7/16 studs. Lifter preload is right around .030

thank you

Last edited by VinMichael; April 17th, 2018 at 12:53 PM.
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Old April 18th, 2018, 06:24 AM   #2  
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If you take the engine firing order and split it in half and arrange them to look like this
1843
6572
you will be able to figure out companion cylinders. Set #1 at TDC, you can adjust the valves on cylinder 1 and 6. Rotate the engine in the normal direction exactly 90*, set the valves on 8 and 5. Rotate another 90, set 4 and 7, another 90 and 3 and 2. You just set the valves with one turn of the engine. This is probably the easiest/fastest method. It helps to have a degrees balancer
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Old April 18th, 2018, 07:17 AM   #3  
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^^This^^

I did mine exactly the way Matt69 described.
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Old April 18th, 2018, 09:28 AM   #4  
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Olds is the same
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File Type: pdf Chevy Valve Adjustment Order.pdf (197.8 KB, 19 views)
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Old April 18th, 2018, 11:02 AM   #5  
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I am a little slower but I don't trust myself with the above. I have several friends that do it that way. I just start with hole 1 and go in the firing order one at a time. It ends up being two rounds of the crank.
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