According to Autodata:
Belt driven, replacement every 72k or 8 years.....Engine codes B20B1, B20B3, B20Z1, B20Z3. 2hr 30 mins for the job.
The crankshaft bolt is tight at 177Nm, all the wheels are keyed and marked in place and it has a manually adjusted tensioner....you'll need a new water pump too.
John
177 Nm is ‘canny tight’ at 130 ft/lbs
Being a single bolt you can expect some thread lock compound too which can be released by heating to the bolt head, giving time for the heat to percolate down the bolt.
John