a9 camshaft & Big Port Valve Head  By  gy6fandan (Read 5,597 times)

Alleyoop --> I'm getting conflicting info.

90GTVert stated the following on another post :

"You need to put some modeling clay across the top of the piston. It's best to apply oil or some type of lube to each side so the clay doesn't stick so bad after the test. Assemble the top end and set valve lash. Turn the engine over two full revolutions (1 revolution of the cam). Remove the head. You should be able to immediately see if the clay has been broken through, indicating the valves are hitting the piston. Even if not, you need to do farther checks. I cut the clay in half across the centers of the valve indents with a razor, then measure the thinnest point. Be careful not to squish the clay when working with it "

I know that you ( Alleyoop ) and him ( 90GTVert ) both know your stuff . So I am really lost on this.

However, I found a link to the method 90GTVert stated above :

How To Check Piston-to-valve Clearance


If you are conflicted and are worried about it by all means do the valve clearance test. 
Alleyoop