 Rocker shims!, out of stock? |
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| emerygt350 |
 Aug 12 2023, 02:36 PM
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#1
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Advanced Member  Group: Members Posts: 2,096 Joined: 20-July 21 From: Upstate, NY Member No.: 25,740 Region Association: North East States  |
Well, just got the rockers back on and I have almost no play left in the intake. exhaust has plenty but most of the intakes have less than .06 when backed all the way out. The geometry looks good but I can't run it like that. I need to shim it. I double and triple checked that my pushrods were inserted correctly. I would hate to have to cut new pushrods.
I see pmb has some shims in stock. How big do I need to go to add some distance? Is it weird that the exhausts have all that space and the intakes are hugging the stems? I didn't shave the head or the block. I did remove the .03ish thick head gasket and the .01 shim that was under the old sleave. I added back in a .02 shim, no head gasket. So I really shouldn't be looking at more than a .02 drop in height. |
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| brant |
Aug 12 2023, 02:54 PM
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#2
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914 Wizard Group: Members Posts: 11,624 Joined: 30-December 02 From: Colorado Member No.: 47 Region Association: Rocky Mountains 
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Did you put a dial indicator on it
Your geometry can’t be right if you need shims Cut pushrods are the only way to get the geometry right I made my own shims out of stock and some rockers needed two shims to get everything right |
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| r_towle |
Aug 12 2023, 03:26 PM
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#3
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Custom Member Group: Members Posts: 24,574 Joined: 9-January 03 From: Taxachusetts Member No.: 124 Region Association: North East States
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Custom length rockers is the way.
There are kits out there, all doable at home shop |
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| emerygt350 |
Aug 12 2023, 03:38 PM
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#4
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Advanced Member Group: Members Posts: 2,096 Joined: 20-July 21 From: Upstate, NY Member No.: 25,740 Region Association: North East States |
 I mean it isn't perfect but it isn't far off. Who know what it looked like before. I have a dial indicator to check the geometry. I would rather not cut pushrods. |
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| bkrantz |
Aug 12 2023, 07:35 PM
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#5
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914 Guru Group: Members Posts: 7,766 Joined: 3-August 19 From: SW Colorado Member No.: 23,343 Region Association: Rocky Mountains
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The angle looks good in that photo. A shorter pushrod would change that. Maybe a minimal thickness shim?
Intake and exhaust rockers are different. I had to compromise shims and angles on mine. |
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