Nissan Xtrail, Motor sound at low revolution

Good night friends,
I have a Nissan Xtrail 2003, good friends, it told me that the chain sound is because I have to change the temperators of it, now I will do it, but I have a restlessness:
why they flicked when the car is hot, I move it at low shots slowly and I look a little for the brake and clut I put it again in that low revolution condition and return that type of sound. Another thing because I reason when I am at 80km road speed. 100km. I listen to the engine as if it is treated a small truck to diesel, if the nissan I have is gasoline. That I have to do so that these sounds disappear, or are they normal for this car.

For the kindness of answering, I am grateful.

Hello, you will see, the theme is that the blows can be the tensors of the skates devided to the stretch of the chain Another thing may be that some patin of the tension of the chain is very determined, here you would also have to verify the chain of the oil pump if it is that it mounts it

I share the Czech chick response the time chain may need to change it and also the tensioner could have damaged better check it because it can cause you greater damage and if it empies to sound like diesel it is because if a latensemora Greater ... greetings ...

Thank you very much friends for your answers, I will send sinperdida to review, I have another concern, the sound of Tac Tac Tac Tac as 50 in a second, my father says that they are a clash of valves and that I should dispense with the car because it does not work anymore, now that sound only presents itself sometimes and in certain conditions. Will always the skates and lack of tension of the chain?.

Thank you very much and sorry for ignorance.

Verify the oil level Taquets are hydraulic. GREETINGS