I am rebuiling a 2.0 zetec at the moment.

I have tried lapping the valves in, the Inlet valves have all gone fine but when doing the exhaust valves I cannot get them to a nice finish, theres still some pitting on them.

Is this going to be ok? does anyone have any pictures of their valves when theys lapped them in?

If i bought new valves would i need new valve seats?

cheers

Pete

 

if they have bad pits they need to be re-cut!

Alex

 

I cannot feel the pits by hand but can still see them (black spots) theres probably 10 on each valve.

 

Yep as Alex says, sounds like they need recutting (grinding)

Not a very difficult thing to do especially:

 

assuming you have a lathe huh Chip!

Alex

 

I don't have a lathe!

If I bought new valves could i lap them into the old seat?

 

If the seat is not pitted than yes you could if you had new valves.

If the seat is pitted too then it will need recutting.

I doubt you NEED new valves though mate and its not much money to get them recut for you if you cant do it yourself.

Look at that antique piece of home made equipment im using in that old photo above, even that only takes a few seconds per valve, its not even half an hour to do a whole set of 8!