Join Date: Apr 2008
Location: Melbourne, Australia
I've just completed a similar installation in my Alfa (1971 1750GTV RHD). It appears to be OK visually but I had to install the flex disc completely opposite to the included instructions. In other words, I fixed the new flex disc to the driveshaft yoke and then attached it to the gearbox yoke.
What confuses me with your photos and the instructions is the the driveshaft yoke bolts seem to be fitted from "rear to front" in the yoke. However, on my car, and in relevant service manuals, all bolts are fitted from "front to rear" be it gearbox or driveshaft yoke. I found the holes in the driveshaft yoke would only allow the threaded portion of the bolts to pass through and not the shank. Not sure if you had to modify your driveshaft yoke to pass the bolts through or whether this was a design change by Alfa at some point...
In any event, I fitted the new flex plate the following way:
1. Driveshaft bolt + one spacer + safety plate + new flex disc (flush hole side) + three spacers next to protruding bush on flex disc -> through drive shaft yoke and then locknut (and simple washer). Ensure second safety plate is resting loose between the driveshaft yoke and the new flex disc for subsequent fitting over the gearbox yoke bolts
2. Assemble the whole unit then onto the gearbox yoke, which already has three spacers on placed on each of the gearbox yoke bolts. Ensure the second safety plate is also located on the gearbox yoke bolts, add another spacer to each bolt and then tighten down with locknuts.
I think the keypoint with all the spacers is to centralise the new flex disc where the old one would sit. I found the old flex disc was 46mm wide whereas the new flex disc is only 28.3mm wide (excluding the protruding bushes alternating on each side). This means you need to take up a total clearance of 17.5mm with the safety plates and spacers or approximately 8.75mm each side for symmetry.
Therefore, one safety plate (6.3mm) + one spacer (2mm) on one side gives you 8.3mm approx. On the other side, three spacers (3 x 2mm = 6mm) + the protruding bush on the flex disc (3.3mm) gives you 9.3mm approx. Near enough that by eye, everything seems to be OK.
Sorry for the metric measurements but I hope you tell from my long winded explanation how I set things up. I haven't taken any photos but if you would like some, please let me know.
I hope my explanation helps you.
Frank (Melbourne, Australia).