Best regards Team:

2000 V6 X-Terra with 40,000 Miles, all maintenance done with the dealer. Since some time ago I can hear the clicking noise of the valves when I start to accelerate, is this a normal sound...?? The dealer has always use the CASTROL Oil but last time I use SHELL ROTELLA Heavy Duty Oil and the sound seems to have diminish a little but is still there. Any ideas/suggestions will be really appreciated.

RB