sticky valve or

I would do a wobble test. If you do have a slight stick to the valve it
will get worse and at some point could cause in flight problems. A
wobble test should set your mind at ease.

Could you describe the "wobble test"? Not familiar with the term.
Thans, Dick
"Robert M. Gary" wrote in message
oups.com...
I would do a wobble test. If you do have a slight stick to the valve it
will get worse and at some point could cause in flight problems. A
wobble test should set your mind at ease.

On Tue, 24 May 2005 11:03:11 GMT, "Dick" wrote:

Could you describe the "wobble test"? Not familiar with the term.
Thans, Dick
"Robert M. Gary" wrote in message
roups.com...
I would do a wobble test. If you do have a slight stick to the valve it
will get worse and at some point could cause in flight problems. A
wobble test should set your mind at ease.

It literally means removing the rocker arm and valve spring, grabbing
the valve stem and seeing if you can wobble it back and forth. If you
can it means the valve guide is worn.

The valve guide has to hold the valve in it's cylinder without
wobbling because if it's wobbling it isn't seating on the valve seat.
If it isn't seating on the valve seat properly, it's leaking. If it's
leaking, it's either burned or about to be burned (if we're talking
about exhaust valves).

See: http://egaa.home.mindspring.com/engine1.htm for an extremely
comprehensive look at the issue of valve guide wear in parallel valve
Lycoming engines.

Corky Scott