![](/images/threads/icons/0.png)
My mate had an unfortunate weekend.
400whp S14 SR20VET 20V with a built bottom end. He thought he heard rod knock so he shut it down.
Cylinder #4 doesn't look good..
![](http://i.imgur.com/1ZGBogG.jpg)
Next step, remove head
![](http://i.imgur.com/qEul2NL.jpg)
Cylinder liner
![](http://i.imgur.com/jTJ81Mk.jpg)
Valves
![](http://i.imgur.com/uKwFJ5W.jpg)
Seems like a mechanical failure, all the other cylinders look perfect. No knock was ever registered. Headgasket is still intact too!
400whp S14 SR20VET 20V with a built bottom end. He thought he heard rod knock so he shut it down.
Cylinder #4 doesn't look good..
![](http://i.imgur.com/1ZGBogG.jpg)
Next step, remove head
![](http://i.imgur.com/qEul2NL.jpg)
Cylinder liner
![](http://i.imgur.com/jTJ81Mk.jpg)
Valves
![](http://i.imgur.com/uKwFJ5W.jpg)
Seems like a mechanical failure, all the other cylinders look perfect. No knock was ever registered. Headgasket is still intact too!