i'd change it 20k miles early rather than it snap
at work, the cambelt snapped on one of the pool cars, a Golf TDi, cost £2400 to put right
i changed it as soon as i bought my car, only had 36k miles on the clock but it was nearly 5 years old.
also worth changing the water pump, as its well known SEAT originally fitted units with plastic impellers which are prone to breaking
, make sure the replacement has a metal impellor