<VV> Broken valve seats

[Bryan Blackwell]

When the intake seat is missing or has jammed the intake open, then 
there's plenty of room for small pieces of the seat to get sucked back 
into the intake tract - don't forget that the pressure differential is 
greater in that direction than out the exhaust too.
--
Bryan Blackwell bryan at skiblack.com
http://autoxer.skiblack.com/
   Corvairs: '61 Lakewood, '64 Greenbrier, '65 Corsa, '66 Corsa
   '69 Road Runner, '97 Ford F-150, '99 Neon R/T
"Why do something if you're not going to obsess about it?"

On Sep 12, 2006, at 11:06 AM, Clark Hartzel wrote:

> 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.
> Unless it happens at the overlap period when both valves might be open 
> a
> small amount.
> Clark Hartzel