Valve Adjustment EPA2010 MX13

[@farhad_222]

Hello Friends, I have a daf model 2020 mx13 engine, engine retard. Why does this engine damage the valve stem, and I have seen several cases that their valve stem also breaks quickly, and this is a weakness for this engine. Is this weakness due to the construction of this engine or is there a reason that causes this problem, please guide me, this is a problem. The second question is what type of oil is suitable for this engine. Thanks