Perhaps an oil change using a quality branded oil would help to mitigate those issues. Some years ago I bought a second hand Mitsubishi Pajero 3.0V6 24V with 30.000km on the clock. I had a ticking noise produced by the valve lifters. After the first oil change using quality branded synthetic oil the ticking dissapeared.
Pros: ticking noise disappeared
Cons: ticking noise present
Vehicle:
Mitsubishi Pajero
Mileage: 30000 km
