Cam Lobe Pictures, Need Analysis Help

[wrogers55]

The pictures are a little deceiving I think. The twin "marks" are scores that can barely be felt cutting into the lobe with a finger nail. No metal appears to be lost between the marks.

I have a magnetic drain plug in the pan and it was clean/no metal. I did cut the oil filter open to have a look and again nothing in there either. Could be ultra fine stuff that couldn't see by washing the filter material out, but nothing big enough to see or feel.

I'm going to post more pictures as I go because you guys are good and this is really helpful. At the moment I'm thinking I'll just replace the cam and lifters.....and discuss the pushrods and rockers as I get to them and see what they are and how they look. The motor was supposed to be built all the "right stuff" at a big cost number. So we will see.

Thanks again.

[YerDugliness]

Originally Posted by wrogers55

The motor was supposed to be built all the "right stuff" at a big cost number.

That may be the saving grace....good equipment can be an investment in longevity as well as in power!!

Cheers, Dugly

[Gaz64]

Wayne,

Have you inspected the roller?

Can you post pics of the lifter roller?

We can see the overheated blueing on the shaft which extends further away from the lobe on the base circle compared to the nose.

It shows the amount of friction the failed roller has caused.

You may not be able to feel it with your fingernail, but it is there, it is an abnormal wear pattern, and it would have become a catastrophic failure.

The ground up metal, as small as it is, would have passed through the oil pump first before the oil filter traps it.

Inspect your oil pump as well.