i have done them beofre i took them for a fair drive aswell i have lost power and im guessing this is because the valves arent opening fully
could it be from the springs
im up shit creek without a paddle
i have changed oil to the one they recommend i could get my other motor running good with 300rwkw but not this stock one
this is not a small tick aither it like the loudest disel car you have ever heard