International Lancia Forums

When you say a 1.3 HF flywheel do you mean for a spring clutch or a diaphram clutch?

Mine is 19mm but does not appear in the data book, but I know it's the correct flywheel because it's described (by weight) in the homolgation papers. Is yours the same as all the early Fanalones - rather than being a pre production special?

There shouldn't be any problem putting it back together as it should be dowled so can only go one one way, but I think you will need an S1 starter motor, but as far as I can tell they were all the same so shouldn't be that hard to get hold of.

I would think your bigest problem is likely to be if the starter ring is worn as the fixing bolts for the diaphram clutch are so close to the teeth on the outside of the flywheel. This means that the traditional route of turing the teeth off and putting a new ring on is probably not possible as you would either have not enough thickness on the ring or you would have to drill through the ring for the bolt holes. I looked at welding my teeth up and re profiling but when I compared to a few others I decided it still had a lot of life left in it so didn't bother. I did have it refaced using the standup dimensions for the friction face in the book (0.5mm from memory) - you have to take the clutch dowels out for this.

I've attached some photos for comparison:

No, I mean a 1.3HF flywheel--shared only by that model and the berlina GTE. What you show is the DT "type 4" flywheel, which came in 104 (818.540) and 126-tooth (818.302) versions. Mine is entirely different; it's DT "type 3"

I don't have a photo, but I'm attaching the relevant page from the DT. As you can see, the "type 3" is not just a flat disc; it has a deep (maybe 25mm or 30mm) flat ring at the perimeter (similar to the earlier S1 flywheels) that forms a deep recess for the clutch/pressure plate assembly.

As a wild guess, I'd think that maybe a dozen engine / gearbox pairs were made this way.The 818.540 block castings weren't ready, and the 818.540 flywhell hadn't been engineered. In fact it was probably on the basis of the performance with the 818.342 flywheel that the factory decided to develop the simpler 818.540 flywheel with a lower polar moment of inertia.

Type 3 is a flywheel for a spring clutch not a diaphragm clutch, so I assume from that that the very early cars (first prototypes?) used a spring clutch.

What I have shown is not a type 4 flywheel (I know the difference having held a few in my time), it's completely different in dimensions and weight, (I think a type 3 with the clutch bath machined off - similar to the clutch conversion Huib has done, which would make some sense for Lancia to do something similar). This is the homologated 6kg flywheel and is not in the data book. If it were the data book would show a 19mm 104 tooth flywheel which both the TAV and the homologation papers say the first 609 cars were fitted with.

Interesting. Mine is indeed a spring clutch. And the flywheell appears to be an unmodified 1.3HF unit; it's not turned down. Instead, it still retains the full ring as shown for a type 3 in the DT, and it weighs more than 6kg. So maybe the answer is to simply machine this piece to resemble the one in your photos (which is pretty much what we'd been thinking).