Hello

Short of inspecting the belt for cracks etc there is no way to check it. usually you change it at a specified milage.
If you're at all unsure when the belt change was last done then its a good idea to do a change regardless.

Changing a belt is fairly straightfoward.
On a lot of engines it reccommended to change the tensioners at the same time so check this before starting the job.
Ideally you want to prevent the camshafts from turning as soon as the belt is removed this is normally done by removing the cam covers and locking the cams in place with a special tool.
However you can also mark the crank and cam pulleys relative to the engine block / cylinder heads and then providing you don't turn the engine its then a case of undoing the tensioners and exchanging the belt.

Achieving the correct belt tension with the new belt will either be set with a spring on the tensioner or a torque setting on the tension mouting bolt. Check the workshop manual for the details.

As soon as you remove the belt it is likely the cams will move so either use the special tool as mentioned or be prepared to move the pulleys back into place before tightening the belt and starting the engine.

On your car it is likely that there will be little room to do this job and things like engine mounts and covers etc will all have to be removed to allow access to the belt, on some engines the crank pulley also has to be removed.

Take a good look at the belt run before you start ( take a picture if neccessery) and ensure you have all the tools before you begin

Best of luck

Matt

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