Damaged valve

gotlund · Jan 21, 2011

Hi,
found this one...

one of the exhaust valves on my fe450 2008
does anyone know why this happens?
what do i need to do when i install a new valve ?

[attachment=1:1g78hvwd]IMG_3508 (kopia).jpg[/attachment:1g78hvwd]
[attachment=0:1g78hvwd]IMG_3507 (kopia).jpg[/attachment:1g78hvwd]

kingmoochr · Jan 21, 2011

that doesnt seem real bad, does it ride past the seal? if not, you can file it smooth and use the valve. otherwise, lap the new valve to make sure it has a good seat and you should be pretty much set.

gotlund · Jan 21, 2011

right by the seal

what does "lap the new valve" means ?

berger · Jan 21, 2011

gotlund said:
right by the seal
what does "lap the new valve" means ?

Here is a demo of valve lapping. They are using a car engine in the demo, but the operation is the same.
http://www.streetfire.net/video/this-is ... _80862.htm

Taffy · Jan 22, 2011

your cotter/valve keeper did that damage. they do do that sometimes. as they say, you can still use it but get rid of any high point now so the valve will come out. use a small file to rub down that area then you should be able to pull it through.

regards

Taffy

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