My Kohler K321 14HP rebuild thread

[propane1]

Seems like it should not have moved Eugen, by the discription on the ad.

Noel

[Eugen]

Now I'm wondering why the insert didn't read the instructions!

Ok, on a serious note, here why I think it failed. The insert isn't flared, but it has on the top outer rim no thread, rather a knurled surface which should stop the insert from travelling lower down the hole. I must've trusted this feature and used just simple blue thread locker instead of jb weld. The insert was sticking about 1/8 below the head surface, enough for the valve to hit it. It could've been worse and damage the head, as the cast isn't thick at all in that area.