When installing new valves into a cylinder head is it necessary to use a lapping compound and spin the valves for a few moments to help them seat or are they ok out of the box ? Is the angle of the valve job always the same as the valve ? What about on radius valve jobs ?

 

bump

 

need to know too

 

If this is a street engine I think you better call a local machine shop in your area.

I installed new valves in our race head right out of the box, but they were drop shipped to us from Manley per Brad at RLZ.

 

has the valve seat been cut?

 

But wouldnt the correct way be the correct way, regardless? What was different on your race motor than a street motor that would affect this aspect ?

 

No but could I hear what you have to say in both cases.

 

if not then yes i would lap them in the best you can or spend the money and have the valve seat cut so you know you have a %100 seal

 

so technically with the valve job then valve should not have to be lapped ? Will the angles on the valve always match the valve seat ? For example sometimes they use 3-5 angle or even radius valve job, wouldn't that affect the seal ?