Hi, I'd be grateful for any advice as my engine know how is pretty limited. I have a 2003 corsa 1.0 12v. A few months ago it was leaking oil, so I took it to a dealership garage and had a lot of work done, including replacing the timing chain and exhaust. I was particularly happy with the garage - their communication was non-existent, the price kept going up as they found more faults, and the air con that I'd asked them to look into was still broken when they returned it with no comment made. Last week, the engine died when I tried to start the car (unhealthy noise then loud knock). I took it to a different garage who had a quick look at the engine and found that all the spark plugs and valves were damaged. They suggested it was due to the timing chain slipping, and as this should be covered under the warranty, I should take it back to the original garage. The original garage has now had a look at it, and got back to me saying that the timing chain hasn't broken and looks normal. They say that it looks like one of the fingers off the camshaft broke off and jammed everything up, but to look into it further would need the head gasket taking off, costing £400 in labour. I am suspicious that the first garage is just trying to blame something that wouldn't be covered under the warranty. With my limited mechanical knowledge I don't know if a timing chain slip could damage the engine and the camshaft or if the garage's account is plausible, so would be greatful for any advice. It's not going to be worth repairing the car if I have to pay for a whole new engine, but if it's the garage's fault I don't want to let them off the hook. I'm thinking about getting an independent report - does that sound like a reasonable way to proceed?