What is the most cost effective cam and rocker arm prep on rebuild? |
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What is the most cost effective cam and rocker arm prep on rebuild? |
tornik550 |
Sep 19 2015, 09:36 AM
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#1
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Senior Member Group: Members Posts: 1,248 Joined: 29-January 07 From: Ohio Member No.: 7,486 Region Association: None |
I am rebuild my /6 2.7l. Everything is either brand new or freshly machined except for the rocker arms and camshafts. I have E cans and I found that there is pitting on one lobe on one cam. I have already spent a fairly massive amount of money. I'm not interested in spending a launch more. I realize the importance of proper cam break in and such.
From what I can see, cam regrind is about $350-400 which I do not believe includes repairing the pitted lobe. Rocker arm reconditioning seems to be around $400. So I would be at somewhere over $800. What are the most cost effective solutions for having my cam repaired, properly prepared (regrind...), and rocker arm refinishing? |
toolguy |
Sep 19 2015, 12:27 PM
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#2
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Senior Member Group: Members Posts: 1,270 Joined: 2-April 11 From: San Diego / El Cajon Member No.: 12,889 Region Association: Southern California |
I was faced with the same high price for rocker regrinding. . after watching a U-tube video, it really is a simple process so i figured i could do that myself. . Here is my dedicated Porsche rocker grinder. . I have a machine shop so accuracy and machining the fixture was just regular straight forward work.
Making the fixture took about 3-4 hours as the rocker mount had to be absolutely square and perpendicular to the wheel. I checked the first hundred or so finished rockers on a cam tower with a good cam to insure full face contact. . I occasionally do them for a local Porsche shop for 3 years and haven't had any issues Hard to see in the photo but the rocker on the left has heel and toe wear at the top of the face. . the right rocker is one of my reground and polished rockers. . You also have to consider getting into the face hardening depth from the factory. . deep grooves and wear can sometimes be through that depth and then need re-hardening or they will wear . . somewhere around a cut of .005 or less seems to be acceptable. I have found that grinding to remove pitting is usually an excessive amount. Attached image(s) |
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