Since I have my intake manifold off right now, I thought I would have a look down the intake ports at the valves. This engine has 271K miles on it, and the head has never been off before. No internal work has ever been performed. I usually run a bottle of fuel injector cleaner at every oil change. Thoughts/comments on how they look?

Note: yes I have already cleaned out any debris seen inside the intake ports in these pics.

Cylinder 1:


Cylinder 2:


Cylinder 3:


Cylinder 4:

 

those look sqeaky clean for that kind of mileage!!

 

nice, that's good to hear

I bet the exhaust valves don't look that clean. Should have taken pics of them when I had the header off awhile back.

 

damn those are some good looking valves for the mileage