- Joined
- Nov 26, 2009
- Messages
- 3,081
Composite is easy but I suspect they contribute to head warpage because they crush unevenly. I've had them blow out over time. I've had zero failures since going to solid copper with pliobond sealer and .005" fine copper wire around the pushrod tunnels and oil return. Solid copper only needs one or two re-torques. Without the pliobond sealer the copper usually weeps. Other sealers are less reliable.