Marked cam lobes?

[Glanza_MK]

Guys,

Just whipped the rocker cover off tonight as I was stripping things down in the engine bay to get the head off. I was having a close look and noticed that the edges on a couple of the exhaust cam lobes were marked. It was worst on the inside of the left hand lobe, exhaust cam, cylinder 3. It just looks like its been worn down slightly on the edge. The only other one to have it that I could see was inside of the left hand lobe, exhaust cam, cylinder 1.

So what can cause this? Will I need new cams when I replace the cylinder head?

Any help much appreciated.

Cheers

John

 

[Sheldon]

any pics mate?

i found one that looked similar to what your saying.. only from the side!

its not clear but maybe you can compare it to yours

 

[Glanza_MK]

Yeah, thats pretty much it mate although its a bit more localised than that. I.e. it doesnt go all the way down the edge but it is slightly deeper markings than that.

What caused it on that one?

 

[Sheldon]

we dont know mate.. but i was told its nothing :|

 

[Glanza_MK]

Oh right! So it should be ok then? I would of thought it would maybe unbalance the shaft slightly?

 

[Sheldon]

Oh right! So it should be ok then? I would of thought it would maybe unbalance the shaft slightly?

well if its working fine without any problems i wont mind.

 

[Glanza_MK]

Sounds ok to me then. My head needs replacing anyway so I might end up getting unmarked cams in whichever replacement one I get!

Anyone else?

 

[Sheldon]

also i never found any metal in the oil... and never heard anything strange.. surely if it rubbed that badly to something cam shaft will lift itself and break the bolts or at least i would have heard something.. so i guess it was there

 

[billybob]

seen them on a few starlets like the ones in the pics must be there when out of the factory no problems with them should be fine

 

[pig666eon]

i have cams with a couple of chips not big but noticeable what would cause this?


car runs fine no problems

 

[billybob]

i have cams with a couple of chips not big but noticeable what would cause this?


car runs fine no problems

mybe if the cams are not retensioned when having them out the vibartion could mybe do it after awhile