Carrera Valve Guide Wear?
01-31-2003, 07:59 PM
#16
RL Technical Advisor
</font><blockquote><font size="1" face="Verdana,Tahoma,Arial,Helvetica,Geneva">quote:</font><hr /><font size="2" face="Verdana,Tahoma,Arial,Helvetica,Geneva">Originally posted by Tom Frisardi:
<strong>Is this valve guide wear problem related to a change in valve stem diameter?</strong></font><hr /></blockquote><font size="2" face="Verdana,Tahoma,Arial,Helvetica,Geneva">Hi Tom:
Oh my, nossir. Its all in the material that Porsche used for guide material.
As another data point, we've used our own phosphorus-bronze guides for many many years and the viton seals. I've not seen any increase in valve stem wear from using this harder, longer lasting material and seals that do a good job of controlling oil consumption and wear......
<strong>Is this valve guide wear problem related to a change in valve stem diameter?</strong></font><hr /></blockquote><font size="2" face="Verdana,Tahoma,Arial,Helvetica,Geneva">Hi Tom:
Oh my, nossir. Its all in the material that Porsche used for guide material.
As another data point, we've used our own phosphorus-bronze guides for many many years and the viton seals. I've not seen any increase in valve stem wear from using this harder, longer lasting material and seals that do a good job of controlling oil consumption and wear......
