Just to be clear, We're talking about the 3 cylinder "Firefly" (Global engine) petrol engine here? This is an engine which interests me very much as it's the newest engine I know of in Fiat cars and is cropping up in a number of their offerings - So maybe I'll end up owning one at some time in the future. There are people in this thread talking about timing belts but, as I understand it, the Firefly's are all chain driven cams? In theory a chain should outlast a belt but this dividing line is becoming a bit blurred now with modern belt and pulley designs allowing manufacturers to now claim some belts are "lifetime" items - My EA211 engine'd Scala being one. The big question is, what do they define as "lifetime".
In days gone by, when belts were quite a new innovation, they got a bad name for failing early and so people got it into their minds that chains were by far the better option. Also, back then, chains did seem to last, sometimes, for the life of the car. So people had a much better perception of them. Now a days though cars cover far bigger mileages during a typical lifetime and are, pretty much, all OHC designs so have relatively long belt/chain runs - wear in a long chain has a much greater effect on engine running than a short chain will. Also modern engines run at higher revs with more extreme valve trains, often variable geometries, which stress the belts/chains more. Indeed some oil companies now produce oils which particularly address wear in cam chains. So cam chain life and timing belt life in modern engines is becoming much more similar. However a belt is invariably cheaper to renew than a chain. - The exception being a "wet belt" - that's a belt which is enclosed and runs immersed in the engine oil - These belts do have a poor reputation and are considerably more expensive to change. For those reasons, the fact that my new Scala has a conventional "dry" timing belt was one of the main reasons I was happy to buy it. - doesn't have a DM flywheel either, Oh happy day! Although claiming to be a "lifetime" fitment, I'll probably be doing a belt on it at around the 80,000 mile mark (unless something unexpected intervenes).
However, back to thinking about chains and, in particular, the new Firefly engine. Probably the most important thing for the life of any timing chain in any engine is to use the manufacturer recommended oil or at least an oil which fully meets the manufacturer specification and to change that oil regularly. I would NEVER go to an extended mileage service option on a chain cam engine and would probably change the oil and filter annually if the recommended interval was not reached within the year.
There's other "stuff" I'm looking into with the Firefly. It's a turboed engine and of quite small capacity - as are so many these days. My new Scala being a case in point, it's only 999cc in a car the size of a Golf. But what this means is, to get the power out of it by turboing it, the engine is quite highly stressed compared to an older design. However these wee turboed power units have been around for some years now and a lot of the earlier problems have been worked out. Also, the Firefly uses a hydraulically actuated/controlled valve system - like the Twin air/Multi air - This is a very "clever" and versatile way to operate the valves and gives the ability to control valve timing in a way you can't with any other mechanical system of valve operation - thus allowing emissions and performance to be varied and controlled much more finely than on many other designs. It seems to work well but also seems super critical of it's oil so another reason to use only manufacturer spec oil. It's worth noting though that when problems do arise the repair costs can be pretty hefty. However, from our point of view, there's not a lot of history stored up yet on this engine relating to chain reliability so it's difficult to know if it's going to be a reliable chain drive, like some, but not all, of the Japanese brands or a bit of a disaster (won't mention any specifics here).
I think, if the car has always been serviced by a FIAT accredited dealer, you probably have little to fear as the correct oil should have been used. More of a lottery if anyone else has been involved with it? The costs are considerable to do a chain compared to a belt on almost any engine. If I were the dealer and the engine was running well without any "nasty" noises, especially if there was no chain rattle at a cold start, and knowing the manufacturer rates the chain as a "for life" fitment, I'm afraid I'd not be doing it. Looks like a nice car from your images and I'm sure another "punter" would be along shortly.
Here's a couple of forum threads you might like to read:
Hey everybody The 1.0 litre firefly engine in our 500X is suffering because of a camchain/timingchain gone to long/stretched. Have you heard anything like that regarding said enginefamily? We’ve only driven 48000km since we bought it new, in may 2019, and it has been serviced according to...
www.fiatforum.com
and
Picked up my new "wheels" .. a 1.0ltr Firefly engined doodah, in Sport flavour. Sporty Red, which is an even better colour in real life than it looks in the photos. :love: I had a nose under the bonnet to see what's what.. the engine is positively tiny, which at least means lots of room to...
www.fiatforum.com