GN1 valve stem seal size

Louie L.

Habitual Line Stepper
Staff member
May 24, 2001
Does anyone know what size the teflon seals on a GN1 head are? I broke several inner dampner springs on my heads. In turn some of them damaged the seals. I got lucky and my local guru had the springs in stock but not the seals. Im gonna try the local auto parts store. I know this info is on the spec sheet when you buy them new.hanks
9 sec,
Thanks for the info.

I had Cal check springs against the lift for my combo(523 lift with 1.65,s) He informed me that there was plenty of clearance and coil bind should have not occured .I did over rev the motor several times, bouncing it of the limiter which could have likely caused this.