I'm experiencing the common timing chain rattle on my low millage (36,000) 6 year old Seat Ibiza 1.2 TSI engine. I've been quoted £400 for replacement at an independent garage. Is it worth having the chain replaced in the hope of getting another 36,000 out of the car or is this a fundamentally poor engine, and/or has other damage been caused to the engine. The oil consumption is up at around a litre per 1000 miles and not sure if its related to an engine issue, but the HT leads needed replacing a couple of months back.