 1.7 Rocker Install on 2258 with 2.0 heads, HD Aluminum vs Chromoly push rods - swivel foot adjusters - valve lash caps |
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| Robroe |
 Sep 5 2026, 04:30 PM
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#1
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Member  Group: Members Posts: 80 Joined: 10-August 21 From: Wenatchee, WA Member No.: 25,793 Region Association: Pacific Northwest  |
Building 2258 from 1.7 for 73 914. 96 mm cylinders, 78mm stroke, Web Cam Raby 2500 grind, Hoffman/Raby 2.0 heads. Installing valve train now. Valve stems have .077 thick lash caps. Rockers are 1.7 liter version. I’m planning on ordering oem 911 swivel foot valve adjusters. Planning to use HD aluminum push rods although I had considered chromoly and was advised against them due to coefficient of expansion. Have adjustable push rod on the way for proper geometry adjustment. Not sure if (or how much) grinding from rocker arm bottoms will be required to allow for proper movement of swivel foot. Also need to discover whether valve stem lash caps should be used with swivel foot adjusters. And if I’ll need to shim rocker arm mounts to achieve proper half lift geometry. So I’ll, report as I go. Any advice for me?
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| 914Sixer |
Sep 5 2026, 05:22 PM
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#2
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914 Guru Group: Members Posts: 9,562 Joined: 17-January 05 From: San Angelo Texas Member No.: 3,457 Region Association: Southwest Region 
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Rocker arms have to be machined. Use 2.0L arms with 10mm harded steel swivel feet. Will post picture up tomorrow.
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| 914werke |
Sep 5 2026, 08:24 PM
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#3
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"I got blisters on me fingers" Group: Members Posts: 11,743 Joined: 22-March 03 From: USofA Member No.: 453 Region Association: Pacific Northwest
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| cgnj |
Sep 5 2026, 08:29 PM
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#4
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Senior Member Group: Members Posts: 740 Joined: 6-March 03 From: Medford, NJ Member No.: 403 Region Association: None
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@Robroe
I have used both 911 swivel feet and Thorsten Pieper swivel Feet. They are available in M8 & M10 here.Thorsten Piper Swivel feet They may be cheaper than 911 feet. Thorsten Pieper & CrMo pushrods hands down better when it's valve adjustment time. |
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| Robroe |
Sep 6 2026, 01:12 PM
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#5
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Member Group: Members Posts: 80 Joined: 10-August 21 From: Wenatchee, WA Member No.: 25,793 Region Association: Pacific Northwest |
QUOTE(914werke @ Sep 5 2026, 09:24 PM)  Do you grind the rockers yourself or find a machine shop? |
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| porschetub |
Sep 6 2026, 08:06 PM
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#6
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914 Guru Group: Members Posts: 5,165 Joined: 25-July 15 From: New Zealand Member No.: 18,995 Region Association: None |
QUOTE(Robroe @ Sep 7 2026, 07:12 AM) QUOTE(914werke @ Sep 5 2026, 09:24 PM) Do you grind the rockers yourself or find a machine shop? The rockers need to be clearanced with a specific type of milling gutter ,you aren't just grinding the thickness ,the cutter forms a tapered cup as per above attachment to clearance the required amount. You have no use for lash caps in this instance ,tread carefully when purchasing swivel-foot adjusters as with the stock type replacements screws there is rubbish out there... choose carefully there. Good luck moving on , (IMG:style_emoticons/default/beerchug.gif) . |
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