Dunno how it is in the UK but they generally cover the first few hundred miles in Korea. I've made use of this three times and saved me quite a bit...of the seven or so times I've had my engine out and rebuilt, I've only had to pay twice, more or less.
I always used to be under the impression that they wouldnt be covered especially with high power engines. That was until I had mine rebuilt by MGT racing. They did a great job and its still going strong now however they did also say that providing it wasnt used on track during the waranty period, they would repair any engines breakdowns for a 1 year period.
That 1 year has past now though so I'm keeping fingers crossed it keeps going the way it has :thumbsup:
European law is that half a year is dealers warranty....this is written down and there is no change they can come around it.....when someone builds a 600hp engine,he has to do a year warranty on it...the word motorsport use is not existing in the european buyers rights....if you buy something of a company/garage/tuner,you have 1year minimum warranty,half a year the seller must prove it was ok when sold,the second half year the buyer has to prove it was knackered when bought....
Easiest thing to do is to ask the garage, especially if they don't mention one. If they do mention/agree to a warranty, try and find out exactly what they will cover, whether it's just their own work, or for a complete rebuild, the internals, bolt ons, things like that.
In the end, it's down to us to ensure we get the best, to cover ourselves and our cars.
I've usually found that std rebuilds come with warranty, upgrades dont. naturally the life of an engine will shorten depending on the build and stress levels. I think common sense prevails on this one.
Every tuner should show clarity and faith in their work. It would be hard when people buy and ask tuners to fit used parts, I think that should nulify any warranty but only if damage occurs directly from that part. Bit of a broad issue on that part.
But with new parts and new builds of whatever nature, you are requesting say a build of 600bhp, they are the specialist tuner, that is what they are supposed to competently build for you. It is built for use, not for display therefore should be warrantied.
Tuners can also stipulate rules to this by stating what purposes and limits they have built the engine for, then there should be an agreement.
Its purpose is generally basic: Use of the high power to full extent.
Limitations they can pose: Create Rev limit, Max top end speed, sole maintenance of vehicle within warranty period etc........