Checked valve clearance...got nasty suprise?!

[vasonline]

Hi,

I have the 2008 Toyota Yaris, with the 1.3 2SZ-FE engine.
The first 5 years, maintenance was done at the dealer.
The last 5 years I did my maintance myself (oil change, filter, ...)
At 8000km / intervals (yearly)
Using the Toyota 5W30 oil.

Now at 90.000km a check of the valve clearance is recommended.

I pulled the valve cover, and measured the valve clearances.
Both in- and exhaust camshaft clearances where in specification.

But I got worried!
That intake camshaft lobes don't look very good to me!?
Actually the more I look to it, it looks awfull.

The exhaust camshaft looks fine.

When going over with my my fingernail, I can easily feel the 'pits' that are in there.

I have the valve cover still open.

Some toughts:
New intake cam and shims?
Just keep driving it this way?
Manufacturing defect? Oil problem? (hm? I always checked the dipstick regularly, and had no oil burning or a low oil level)


What should I do? / What would you do if it's was your car?

Attached are some pictures

Greetings!