Re: 706 rebuild 3 questions?

Posted by captaink on January 09, 2006 at 07:35:16 from (66.115.214.56):

In Reply to: 706 rebuild 3 questions? posted by Kelly C on January 07, 2006 at 18:13:19:

Lots of good stuff here so far. One more thing on the burnt valve. When you have the valves done make sure that it has rotators on the exhaust valves and that they are working correctly. If the exhaust valve doesn't rotate then it is possible that carbon could get between the face and the seat and allow the extremely hot exhaust gas to pass through during the power cycle in the cylinder. This super-heated gas will over heat the thin outer margin of the valve possibly to the point that it will literally blow out a small portion of the valve. Once this begins, it just gets worse, eventually to the point that yours is. A burned valve left go long enough can cost you a guide (valve is always under sideways pressure when closed) and a seat if the valve guide gets loose enough to allow the valve to shift off center on the seat.

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