<VV> Broken valve seats

[BobHelt at aol.com]

In a message dated 9/12/2006 8:06:57 AM US Mountain Standard Time,  
chartzel at comcast.net writes:

How do  pieces of a broken valve seat get into other cylinders?  On the
intake  stroke the piston is sucking air into the cylinder and on the  exhaust
stroke it goes out the exhaust tube.  Sounds impossible that a  piece of
steel could be blown into another cylinder when the intake valve  is closed.



Clark,
The problem of getting pieces of a valve seat into the other chambers is  
mainly (if not entirely) a problem with a dropped intake seat. when an intake  
seat comes out, the valve is held open. The piston hits the valve which crushes  
the seat into a bunch of small pieces. The next time the piston comes up, the 
 force of the air in the chamber blows the pieces past the intake valve (seat 
is  gone) and into the manifold. 
Regards,
Bob Helt