I thought orginally that I broke a piston ring/land. I got the heads off and found this. I have never seen this before, anyone else?
broke_valve - SVT Performance Photo Gallery
broke_valve - SVT Performance Photo Gallery
Anyone ever see this before...
- Thread starter 1badblownstang
- Start date
Ouch. Looks like the piston hit the valve. Did you over rev it accidentally?
Probably not a valve striking a piston, when valves and pistons meet there is usually bent valves as a result.
It looks like maybe it was running to lean which caused this.
+2, my friend did this doing a highway pull in his supercharged s2000(honda) ran lean, because he was only on 93 octane(tuned and normally 100). it was funny because when we seen this we wondered how he drove the car home from gingerman raceway, about 2.5hr drive from home.
No contact, it melted the strap off the plug also. The car is tuned and mildly at that. All the other plugs/cylinders looked great. Looks like it just starting draining the rail, went lean, knock sensors probably kicked in and prevented anymore damage. The car actually ran ok, I made it about 10-12 miles home. It ran a little rough at idle, but at cruising speed felt normal.
Haven't seen that before. How'd you bend the valve the other way?:shrug:
i've seen similar from a BHG http://i248.photobucket.com/albums/gg170/realitygt/IMG00008-20090806-1432.jpg
burnt exhaust valves aren't uncommon, burnt intake valves are.
Which cylinder is that?
#8. and the valve right next to it needed the valve seat replaced, it was spinning free.
#7 and #8 are prone to overheating due to hot coolant pooling in the area. Localized overheating could have caused your problem, just a thought. Make sure you get a cooling mod on the drivers head when you put it all back together.
Good luck!
Good luck!
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