hey guys i got the head off to replace the headgasket, which wasnt blown or cracked it simply had like a clean area around #4 cyl and you can see where combustion met coolant. The head also had a tiny tiny indent in that area, so its getting milled right now, valve seals are getting replaced, pressure tested and cleaned.

Just wondering if i should check anything while the head is off, anything i should look for at the cylinder walls or the pistons? I got a **** load of sludge on #4 cyl, and a little bit on all others, ill post pics later!

Thanks for any suggestions