Thank you for your reply. Do you know for definite the eBay item would fit? Do you know if it is a big job? I'm going to tackle it myself if I can been quoted £400
As shown in the listings, this part was common to several older models, so I'd have no worries about sourcing the one from Ebay. I would first run it through Google translate to be certain of postage costs and willingness to send to UK, before making the purchase. Unless you speak Italian of course.
Haynes did not produce a manual for the Seicento, although you might find a copy of the Fiat genuine one on CD on Ebay somewhere, but a hard copy is always easier when working on the car. As described above, get a Haynes Cinquecento manual (book 3501), and have a good read through section 9, chapter 2C before starting work. Specific things to check are torque settings, front crank pulley especially, nut sizes, and accessibility. For the cost of the manual and a bit of grovelling under the car, you'll know whether you're ready to do the job, or pay someone else.
I've not had to do any work on the ohv engine, always had the ohc engines, but from the pics it looks like a normal camchain setup, so not too difficult, as long as it is accessible.
When refitting the cover, fit all the bolts loosely, but don't tighten them. Fit the pulley onto the crank but no need to tighten the nut, then jiggle the cover a little, to ensure that the seal is centralised to the pulley, then tighten some of the bolts. You'll probably need to remove the pulley to tighten them all. This ensures the cover and seal are concentric with the pulley so avoiding leaks. You'll have fitted a new seal anyway, won't you!
I'd hope you are changing the chain and the tensioner, not just the tensioner.
