Hi all, new to this site and recently bought a 1997 1.1 Cinquecento with a blown head gasket. As the car is for my girlfriend and I rebuild Porsche engines for a job i thought that it would be an easy rebuild..rings, mains and big ends plus a quick hone and head skim..the standard.
My question to you all is why has my crank got 48mm instead of the standard 44mm main journals that is stated in both the owners and haynes manual? and where can I get the larger main journals bearings from?
I have rung my local fiat dealer and they quote £15 a pair and are unsure if they are the larger size or not.
Any help would be amazing!!
Kind Regards

Will

Hi Will,

you may well have got an answer already.. but ask a proper engine workshop..

most FIAT dealers nowadays have only been in business for a few years.. and have ZERO knowledge of anything mechanical:bang:

I've answered this once -- at some length -- elsewhere.

The car will have a 1242 Punto engine. Hence, mains are 48 rather than 44, big ends are 42 rather than 38, bores are 70.8 rather than 70 and so on.

Best check, get the engine number off the top -- machined face -- of the block (scotchbrite reveals all).

The stick a Punto engine in a Cinq trick is a very common (and worthwhile) mod. Externally the engines barely differ, but the Punto gets most of it's extra capacity from the stroke so the block is a little taller. Heads are the same, but flywheel aside, nothing in the short engine is swappable.

:yeahthat:
post the first bit of the engine number up, will be 3 numbers then a letter and then a number, then it will be some zeroes.

so first 3 numbers are car model engine was for and then the letter and number is the engine type.

I don't know them all off top of my head but we can find out pretty easy by googling that bit. An example i do know though would be 176B9 is a mk1 punto (176) 1.2 16v engine (B9).

the dot punched numbers above the water pump are
176B2
the bores are 70mm and the 1.1 cinquecento standard big ends fit..

176B2 is a Mk1 Punto 55 engine - which is a 1108cc just like the cinq engine

Couldn't say if there is any actual differences myself but the engine is defo not the original.

That's odd -- and interesting. My books suggest that the 1.1 engines have 44 mains, regardless.

Still, we may be talking of a late change or a "keep the line going" strategy. And I think there were 3 plants producing the engines: Poland (where most/all of the Cinq/Sei work took place), Italy (most/all of the Punto stuff) and Brazil (weird stuff, but sometimes found its way onto the Italian lines, at least).

I'd take the mains to a dealer, or ring Big Mick at eurocarcare.net. My hunch is that somehow your engine ended up with P60 mains. Awkward, but not a real issue.

what i thought as well. I have a set of glyco mains which i put in and the crank wouldn't spin..after lots of head scratching with my boss we measured the interference and there is about 0.05mm :bang: any one have any ideas?
the mains i got were for the 1242 and the crank measures up at 47.975
WHY YOU NOT WORK!!! :bang:

I have stock sizes (for p60) as:

Size 1: 47.994 -- 48
Size 2: 47.988 -- 47.994
Size 3: 47.982 -- 47.988

You'd expect the mains to have some kind of sizing stamp, but.........