My corsa (2001, 1L engine, 94000 on clock) has been making a loud clicking sound from the engine since i bought it. I took it anyway as thought it would be easy to fix. Finally getting it together 5 months later and in the last 2 weeks I've brought it to 5 mechanics. First guy said it was something to do with a previous owner not putting enough oil into it, think he mentioned the tappets needing to be replaced(€200-300 job) . Second guy said it was the camshafts and that these could be replaced or might just need adjusting and that this would be cheaper than the last job. 3rd guy said it was the pistons and that the whole engine would need replacing as it wouldn't be worth taking it all apart. 4th guy said it was just the chain that had to be replaced. He sent me on to a 5th guy who said that yes, it was the timing belt, and he'd charge €250 to replace it. Can anyone tell me if this is a good price and will the engine still make a noticeable clicking noise after it's been changed? I've heard the sound doesn't fully go away, and if it doesn't are there any other ways to improve the sound, water pump replacement or something along those lines? Any opinions welcome, Thanks.