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ept000
Samba Member
Joined: October 26, 2021
Posts: 79
Location: North Carolina
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 Posted: Wed Nov 03, 2021 5:47 pm Post subject: Rocker Arm Shimming |
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How far off center is too far? I set up the one rocker arm that has no more room for adjustment without grinding down the side, and shimmed the rest to match as close as possible. I want them off center to help rotate the valve, I just want to be sure they aren't TOO far off center. I'll probably get them a little closer to even with each other once I start tightening everything down and set the final gap. But for now, how does this look?
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ZEKE65
Samba Member
Joined: December 16, 2018
Posts: 349
Location: Right Coast, Florida
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| Posted: Thu Nov 04, 2021 1:01 pm Post subject: Re: Rocker Arm Shimming |
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Some look pretty good, and others not. I would try to get the ones off closer to center. If I remember right, you are supposed to aim for 1mm ( .040" ) offset between the adjuster and the valve centerlines.
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Mikedrevguy
Samba Member
Joined: October 15, 2008
Posts: 2282
Location: No. Idaho
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| Posted: Thu Nov 04, 2021 5:27 pm Post subject: Re: Rocker Arm Shimming |
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I’ve found that torquing the rockers down can have an effect on the end product.
Maybe add some nuts?
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Last edited by Mikedrevguy on Fri Nov 05, 2021 5:23 pm; edited 1 time in total |
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ept000
Samba Member
Joined: October 26, 2021
Posts: 79
Location: North Carolina
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| Posted: Fri Nov 05, 2021 5:48 am Post subject: Re: Rocker Arm Shimming |
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| ZEKE65 wrote: |
| Some look pretty good, and others not. I would try to get the ones off closer to center. If I remember right, you are supposed to aim for 1mm ( .040" ) offset between the adjuster and the valve centerlines. |
Hmmm, I didn't know it was that tight, To get to .040" I will definitely have to sand down the sides of the rockers. |
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jeffrey8164
Samba Member
Joined: January 06, 2018
Posts: 4155
Location: Georgia
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| Posted: Fri Nov 05, 2021 3:15 pm Post subject: Re: Rocker Arm Shimming |
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Don’t grind the rocker. If you have to grind anything grind the blocks. You can use regular sandpaper on a piece of glass to make sure it’s flat.
Also, I’ve found that I had to use some of the stock shims as they are thinner than the ones that come in the solid shaft kits.
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earthquake
Samba Member
Joined: January 10, 2008
Posts: 4001
Location: SANDY VALLEY, NEVADA
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| Posted: Sat Nov 06, 2021 5:02 pm Post subject: Re: Rocker Arm Shimming |
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You can get 18mm shims at Mcmaster-Carr...
https://www.mcmaster.com/metric-shims/ring-shims-7/
eQ
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evanfrucht
Samba Member
Joined: July 24, 2016
Posts: 2186
Location: Laurel Canyon, CA
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| Posted: Sat Nov 06, 2021 7:48 pm Post subject: Re: Rocker Arm Shimming |
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You want if offset... it spins the valve stem that way, wears better. Resist all temptation to get them centered.
Shim end play for rocker arms to loose zero.
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