Engine Clanking -WTF!!!

**Halon** · 08-20-2008

From what I've gathered from many others, is that OEM valves are of a 2 piece design, which means when they are built, they start as 2 pieces and are then fused together some how to create a single valve. And that is where mine snapped, about where they would have been fused. Apparently 2 piece valves are weaker at that fuse point as well. Maybe it was just old and ready to go, and thank god it atleast died at a lower RPM and only a couple blocks from my house, rather then at 8K RPM on DB's dyno.

Pushit2.0 · 08-21-2008

Quote:

Originally Posted by Halon

... they start as 2 pieces and are then fused together some how to create a single valve..

fusion welding, the same thing they use to weld the exhaust wheel of a turbo to the shaft. Spin one part really fast then smash it into the other part that is not moving. It looks to me like the valve head smashing around caused all the damage. Flow testing the injectors is a good measure to take anyways.

~John