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Registered
Join Date: May 2005
Location: Cridersville, OH
Posts: 1,879
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Rocker shaft wear?
My rocker shafts have a small ridge just on the valve end and all measure .001 or less wear. What's the general concensus on this? The wear is localized to an area about .250 wide and the rest of the shaft is perfect.
Just to add something here... I found my intake valves all had between .004-.0065 taper. While the exhaust all have exactly .0013 and looks to be they were ground that way (still have grinding marks).
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75 911 Indian Red- RUFWAN2B 2000 Boxster 2000 & 2007 Dobies www.stahlwerks.com Cages and preparation for your Porsche “People who never make mistakes must get tired of doing nothing” Bill : The origin of the orgy of Porsche |
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12-15-2009, 02:12 PM
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abit off center
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Well your valves are shot, .0005 valve stem taper would be the max for me.
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______________________ Craig G2Performance Twinplug, head work, case savers, rockers arms, etc. |
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12-15-2009, 02:38 PM
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Join Date: May 2003
Posts: 3,346
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I always just rotate and reorient my rocker shafts to wear on a new area. They will still work fine either way. If you want to make sure you have a quiet valve train you might want to get new ones, a little valve noise doesn't bother me.
-Andy
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72 Carrera RS replica, Spec 911 racer |
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12-15-2009, 03:46 PM
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Join Date: May 2005
Location: Cridersville, OH
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Exactly what I was thinking Andy. Thanx.
And yea I think the valves are toast, well atleast the intakes.
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75 911 Indian Red- RUFWAN2B 2000 Boxster 2000 & 2007 Dobies www.stahlwerks.com Cages and preparation for your Porsche “People who never make mistakes must get tired of doing nothing” Bill : The origin of the orgy of Porsche |
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12-15-2009, 04:18 PM
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1969 and 1986 Porsche Targa and Coupe 1720cc and 3
