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Help with Valve Adjustment

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Old 11-23-2005, 08:35 PM
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Default Help with Valve Adjustment

I decided to get adjustable rockers with my new cam set-up. I go through the 90 degree crank revolution routine and adjust all of the rockers and everything looks cool. Then I rotate the crank through another revolution, 90 degrees at a time to check everything out. A couple of rockers are loose to I tighten them up and do it again. Everytime I repeat this, a couple of more rockers have loosened up. What is happening? Are the lifters (stock) bleeding down with the spring preload? What should I do for the initial setting if this is normal?
Old 11-23-2005, 08:48 PM
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The no fail way to set your valves is as follows:

When the exhaust starts to open set the intake. When the intake starts to close set the exhaust.

This will ensure that the lifter is on the base circle of the cam. Eighter set lash or preload at this time.

Do this for each cylinder.

This will work on any 4 stroke engine.
Old 11-23-2005, 09:10 PM
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Originally Posted by hotrodrx7
I decided to get adjustable rockers with my new cam set-up. I go through the 90 degree crank revolution routine and adjust all of the rockers and everything looks cool. Then I rotate the crank through another revolution, 90 degrees at a time to check everything out. A couple of rockers are loose to I tighten them up and do it again. Everytime I repeat this, a couple of more rockers have loosened up. What is happening? Are the lifters (stock) bleeding down with the spring preload? What should I do for the initial setting if this is normal?
Don't the instructions say to wait between rotations and that it will take several cycles through the rotuine to get them adjusted?
Old 11-23-2005, 09:32 PM
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Worked like a charm. Thanks Bryan.
Old 11-23-2005, 11:00 PM
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Originally Posted by Bryan@LME
The no fail way to set your valves is as follows:

When the exhaust starts to open set the intake. When the intake starts to close set the exhaust.

This will ensure that the lifter is on the base circle of the cam. Eighter set lash or preload at this time.

Do this for each cylinder.

This will work on any 4 stroke engine.
This is the way I was tought and it has never failed me.
Old 11-24-2005, 07:35 AM
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What rockers are they?
Old 11-24-2005, 11:47 AM
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Originally Posted by hotrodrx7
Worked like a charm. Thanks Bryan.
No problem man. This is one of the most commonly asked questions. There is no mystery to setting lash once you know the correct sequence.

Good luck,
Bryan
Old 11-24-2005, 12:31 PM
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Originally Posted by vettenuts
What rockers are they?

Harland Sharp 1.7 Adjustables (Thanks Gunnar)




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