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timing belt
Not unless it is worn out.
The cam belt which works the water pump. Cheers. Donna
timimg belt must be changed every 50,000 km
from 300 to 500 depending on engine and the area you are
its on the flywheel end
One of your pulleys is out of alignment or the bearings are going out. Sometimes if the belt is way overtightened it will jump off from metal brackets bending. The fault is the centrifugal alternator pulley.Buy a new pulley or the easier way is to fit a new alternator,the pulley is very hard to change.
The fan belt cannot be tightened. The scenic has a tention pulley that automatically adjusts the belt. If the belt is slack, it is either the wrong size or it is stretched and needs to be replaced immediately as serious damage can occur in the event that the belt should slip off.
If it's a Scenic model about £300+. If any other model alot
I paid £360, although I got a few quotes around £500.
you need a new alternator/belt
Very high probability of valve damage. Havent seen one yet that hasn't bent valves when belt broke. hope this helps