[GeorgeCo]

I recently picked up a cheap endoscope for iPhone and thought I'd check out my pistons while changing spark plugs the other day. 2000 996 C2 3.4L w/104K miles.

Four of them seem to be lightly pitted and two more so.
Cyl 1 is a little blurry in the photo, but it looks more like 4 or 5 than 2 or 3.
Cyl 1 and Cyl 3 have what looks like a valve imprint, at least in the deposits on the surface. Might that indicate deposits on the valve seat?

What do others see? Anything to be worried about? Anything to do to clean up?

It could be worse, it could be like my Alfa....

[86911TLCAB]

How does the car run?

Can you provide the info on the scope?

[GeorgeCo]

Car is running great. I blew the Air Oil Separator at SP last summer and after all the repair were made I wanted to make sure I hadn't done something bad to the internals.

The Endoscope is like this one:
https://www.amazon.com/Endoscope-Wat...dp/B077TSCFSX/

I was going to try using the mirror to see the valve seats, but with my luck, I'd drop the mirror into the cylinder.

It works pretty well. The biggest challenge for me is knowing which end is up since there aren't any visual clues on the housing or cord.

[86911TLCAB]

If the car is running well Not sure what one would do. I would expect carbon build up on the Pistons. But I am definitely not an expert.

Thanks for the info on the camera..

[cmcfaul@aol.com]

If I am seeing this correctly. That looks like major detonation (too hot and or too much compression.

Chris