Alfa Romeo Forum banner

Studs shearing on new alloy carb mounts (1972 S2 Spider)

1076 Views 12 Replies 6 Participants Last post by  GTA R
We have had a problem with a stud shearing on a new set of alloy Carb mounts that were fitted to my son's S2 Spider. These Carb mounts were supplied about 9 months ago by a very well known supplier of Alfa Romeo parts in the UK, whose name I won't mention right now.
The stud failed sometime within the last 6 months, after the carb mounts were fitted by a reputable and highly experienced Alfa Romeo specialist, back in May this year. This subsequently gave rise to some engine idling problems, seemingly where the carb mount was not sealing properly against the inlet manifold.
We've recently discovered that someone else had exactly the same kind of problem with studs shearing on new alloy carb mounts. Indeed his problem was even worse, as he had 5 of them shear on his Spider. His sorry tale is written up on the other Alfa forum, for anyone who's interested.
I'm keen to know if anyone on this forum has experienced similar problems, as the supplier doesn't appear to want to acknowledge that there is a manufacturing fault with these components.
I'll post up a couple of photos to illustrate the problem in a later thread.
Thank you,
1 - 1 of 13 Posts
What are you using to fasten the carbs on to the mounts? I think (but don't know for definite) that these kind of mounts should use MISAB cups and rubbers. You must make sure there is a 2mm gap between the cups. i.e. don't tighten them up so the cups are touching.

Do you still use the carb steady which comes up from the engine mount with these mounts?
1 - 1 of 13 Posts
This is an older thread, you may not receive a response, and could be reviving an old thread. Please consider creating a new thread.