sodium valves, how do i know?
Instructor
Joined: Nov 2011
Posts: 128
Likes: 21
From: Meridian ID
Le Mans Master
Joined: Mar 2002
Posts: 5,955
Likes: 161
From: PNW
Not sure what the OP means exactly that one head looks dirtier than the other.
The OP said he thought the heads were off a 2002 Z06. If so, the dirty side of the PCV system is drawn off the front/right corner of the valley cover. The fresh air hose connects to the front/top of the RH valve cover.
So it's possible that the LH head might look dirtier in the valve spring area, and it's possible the intake valves might look more carboned up on the RH head because the dirty PCV gasses enter the intake manifold on the RH side, making it a shorter path to the RH valves.
The OP said he thought the heads were off a 2002 Z06. If so, the dirty side of the PCV system is drawn off the front/right corner of the valley cover. The fresh air hose connects to the front/top of the RH valve cover.
So it's possible that the LH head might look dirtier in the valve spring area, and it's possible the intake valves might look more carboned up on the RH head because the dirty PCV gasses enter the intake manifold on the RH side, making it a shorter path to the RH valves.
Tech Contributor
Joined: Jan 2007
Posts: 19,422
Likes: 1,146
From: Dyer, IN
What a drag. Well, you still have a set of 243's, which will flow better than what you currently have......you just paid too much for them...that's all.
