Cinquecento/Seicento 1.4 engine into a cinq (useful info and links)

You can do this now or later. Probably easier while its off though
You need to remove the speedo worm from the cento box, the selector from the top (held in with 5/6 bolts) and the clutch arm, which is held in place with a circlip. You also need the cinquecento driveshaft cups. These are a bit of a pain to remove. They are help in place with a strong retaining clip. Easiest way is a screwdriver either side and suddenly try to lever/pop them out. This is a very messy bit. You now need to clean everything up.
Now repeat with the new gearbox cups.
I would now recommend replacing the driveshaft cup rubber seals as i had one leak after fitting everything and filling up the oil
Fit the cinquecento cups onto the new gearbox using a hammer and a flat piece of wood to protect the cup.



Remove the bolts around the gearbox holding it to the engine. Dont miss the one going the other direction at the front of the engine, like i did and wonder why it wont come apart. Leave the top one until last.
Undo the bolts holding the flywheel cover to the gearbox
With the gearbox now seperate from the engine you can now unbolt the clutch pressure plate. These should be undone in a diagonal sequence. With this removed the clutch comes out.
At this point i used a damp cloth to wipe off any dust from the inside of the housing and from the flywheel.



Inside the housing you can now pull the thrust bearing off of the spline.
give this spline a bit of a wipe with a dry cloth as you do not want water on this. Be careful not to inhale any dust.
Apply a little grease that came with the clutch kit you bought to the spline
Put the new thrust bearing onto the spline. It should locate using the 2 cut outs in the thrust bearing.

On the top of the gearbox housing you have have a clutch clutch arm. This needs to be replaced with the one from the cinquecento gearbox.
To do this, undo the circlip and pull off.
The cinquecento one goes on in the same position as it does on the cento.
There is a double notch in the spline to locate with.



Put the cinquecento arm on and replace the circlip.
Remove the speedo worm from the gearbox, by undoing the bolt/screw on the side of the worm then simply pulling it out with a pair of pliers



Now to get the 6 gears you need to undo the selector mechanism from the top of the cinquecento gearbox. There is 5/6 bolts iirc holding this on.



Hopefully the gearbox was in neutral when it was removed or it makes things awkward.
Repeat on the 6 speed gearbox.



Scrape the sealant from the cinq selector face and the gearbox face, making sure all bits go onto the floor not in the box.



Put a small bit of sealant arount where the other sealant was and torque down the selector mechanism.

To put the new clutch back on you need either a special clutch alignement tool of something fabricated. I used a thick chisel handle with some electrical tape around the end.
Make sure the clutch face width and pressure plate holes line up correctly before proceeding.
Put the clutch over your tool and line it up on the flywheel using the tool to rest it in place. Now slide your pressure plate over the tool and start doing up the bolts finger tight in a diagonal sequence, making sure the clutch stays in perfect contact with the flywheel. Now tighten all bolts to 10NM again in a diagonal sequence.



You can now carefully align your gearbox back into position and do up all the mounting bolts.

How many nuts and bolts do you have lying around now