Hello,
I'm searching for advice that what should to do in this case, or is it necessary, the engine is working almost properly in idle have a little heistation, but it's working. Should I to dissassemble the head and to take off the pistons to give the engine block for checking or what else. Only the 4 cyl. is looking like this the others are normal. It looks like that something had been there btw piston and the head / valves, imo.
The engine is B200FT with 420 000 km, It's working on 0,6-0,8 bar. I did't have checked the compression yet.


I'm searching for advice that what should to do in this case, or is it necessary, the engine is working almost properly in idle have a little heistation, but it's working. Should I to dissassemble the head and to take off the pistons to give the engine block for checking or what else. Only the 4 cyl. is looking like this the others are normal. It looks like that something had been there btw piston and the head / valves, imo.
The engine is B200FT with 420 000 km, It's working on 0,6-0,8 bar. I did't have checked the compression yet.

