Hi there, lam doing a rebuild on my 190e 16v engine. I am not an expert and i am on learning stage as well. The pan was to do a dyi timing chain ang head gasket that went in to oen up cans of worms. I can do mechanical and electrical stuff and not affraid to work onthings.

I checked my compression. 1 to 4 , 130 -150-150-150 dry. 130-150-180-180 wet. When i pull out the head found that mycylinder are scratch can feel with finger nails. 2 of my guide rails are seating on the oil pan shattered.

I decided to pull out everything hoping i can hone the scratches out as first try before spending lot of money on new pistons ad etc.

I been looking around cannot figure out and appologize if it is a dumb question.
1. The cylinder bore is stamped 0 std 95.5 mm and piston s 95.44mm
2. The current cylinder after my honing and got rid of most the scratch is at 95.57mm
3. If i go to 95.6 after honing to get rid of the scratch does this means i am out of spec and need to do a first repair bore at 96.00mm
4. How do i know its tie to bore?

Thanks in advance i am hoping there are soebody here to help.

Elie