I justbgot my super ech dual valve springs in and they came with valve seals also. I am using the euro tool to swoop out the sprrings but was wondering if its necessary to change the seals the head doesn' leak oil. Can they be changed with the head on the car

 

You dont have to. You should tho. Why not.

Yes you can do it head on with right tools...

 

Yes you need to change the seal. Dual valve springs come with seals that have a smaller outside diameter to make sure they clear the inner spring.

 

If you're changing the valve springs it would be stupid to not change the seals, whether you have to for the springs or not. Especially on a 15 year old engine. Especially when they are included and you already have them


And yes you can do it with the head on the car. They slide off with little effort.