Not usually
Remove beltUnbolt tensioner and remove
Worn belt or belt that has stretched to the point the tensioner cannot keep the proper tension. The tensioner can also be defective. Replace the belt and the tensioner.
When you change the timing belt inspect the tenstioner. If it is not in perfect condition replace it.
The water pump is the tensioner for the timing belt. if you need to adjust it, replace it.
there are two tensioners, the serpentine tensioner and the timing belt tensioner. the timing belt tensioner is behind the timing belt cover ;)
How to replace the timing belt for car daewoo nubira1 -step by step
When changing the timing belt, you must also change the water pump and belt tensioner. While the belt is off, you want to check the front crankshaft seal for any leakage. if no leakage is found you don't need to replace it. You should also replace the accessory drive belts, as they will already be off to replace the timing belt.
How to replace a timing belt on Honda accord 94
I believe 90,000 miles. You should consider changing the water pump and tensioner at the same time since you will be in there.
A loose timing chain can only be repaired by replacing the timing chain . A loose timing belt means the belt is worn out or the tensioner is worn out. Replace worn parts.
The timing belt and head gasket are two different things. To replace the head gasket you will have to remove the head necessitating removing the timing belt. If you are going to replace your head gasket it is best to put a new timing belt, a timing belt tensioner and possibly a new water pump. BMW recommends changing the timing belt every 60K miles and the water pump every 120K miles. The belts and pumps are not that expensive and it beats having to go back in and replace them later. Note that on the M3's there is a timing chain rather than a belt.
the water pump is driven by the timing belt. highly recommended to replace the tensioner, tensioner and idler pullies, and cam seals.