how was this possible ? broken exhaust camshaft

[fani]

as it can be seen in the pictures below, the exhaust camshaft was found broken. at a speed of 100 km/h, i heard a noise - bang ! the engine was turned off , couldn't start it again. how was this possible ? the camshaft was lubricated, it was oil there, but it was stucked. who gave up first : the camshaft or the pulley lock up on exhaust valves ?

[robi1000]

There's a collar on the cam, sort of thrust bearing that prevents cam movement in/out. If that broke, it usually siezes. It happened to me. Check if that's broken.

[fani]

how can i put pictures ?
it is said : Sorry, you have reached your maximum Upload Quota Limit of 2 MB
the pictures are maximum 150 kb each.

[fani]

pictures : http://img703.imageshack.us/g/dsc00478d.jpg/

[cliokiz]

Unlucky! :(

Must have had a fracture or just deteriorated from age perhaps

[2 live]

mine let go there too. not kent cams by any chance were they?

[robi1000]

This is it. Same as mine.

[fani]

mine let go there too. not kent cams by any chance were they?

i don't know. how do i recognize them ?
so i'm not the only one who had this problem. mounting another camshaft, could this happen again ? what can i do to prevent it. thanks.

[2 live]

they are usually stamped on the dizzy end iirc. rn then the spec. mine were rn2002s. kent wouldnt admit a fault, but then according to northy, they redesigned them. as they did with his, still unfitted, items.

mine destroyed the head also. not had a problem on the std cams since, think was about 4-5 years ago now iirc

[MatBrown]

I've seen a few standard cams fail there.