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Registered User
Join Date: Nov 2011
Posts: 1
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912 engine question
Im taking the heads off my 1965 912 I found only valve stem seals on intake valves & none on the exhaust valves ? could they have burnt off ?
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11-07-2011, 05:48 PM
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Registered
Join Date: Jan 2005
Location: north america
Posts: 2,228
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I think it may be possible if your valve guides are so worn. What do the valve stems look like?
Was this engine smoking ? |
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11-08-2011, 07:24 AM
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Doc Speed
Join Date: Mar 2008
Location: Massachusetts
Posts: 224
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Most engine builders that I know of don't bother with valve seals on the exhaust valves. Some believe that you should leave them off the intake valves too (der Maestro being among that crowd) for better lubrication and longer valve guide life. Others recognize that the oil leaking into the combustion chamber past the guides when the choice is sans intake valve seals, will cause detonation. My views is skip the seals on the exhaust valves, use 'em on the intake valves.
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- Neil '67 911S (Ol' Ivory) '82 Hewlett Packard 34C |
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11-26-2011, 12:22 PM
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