Throttle Shaft Seals 40 DOCE

**Richard2** · #1 (**permalink**) 08-27-2007, 08:30 PM

I've got leaking throttle shafts on a 1973 Berlina with 40 DOCE Webers. From a diagram, it looks like the shafts are sealed with "O" rings on the venturi side of the shaft bearing.

1. Can the seals on #1 and #4 be replaced without removing the carbs? Will the bearings come off the shaft with the shaft in place?

2. I haven't got a rebuild kit, but a selection of metric "O" rings. Is there anything special about them? I have small sizes.

I'm running out of time to get this car operating well enough for the Berlinas to Bovine run. I need to leave Bellingham Sept 12 with only 2 weekends left. I'm getting worried I might not make it.

Andrew · #2 (**permalink**) 08-28-2007, 12:58 PM

You might call Pierce Manifolds in Gilroy, CA, who are Weber experts, or maybe Group 2 in Seattle up your way.

I've had a lot of Weber cars and have never replaced these seals, but it does make sense they could be causing your problem.

Would it be simpler to beg/borrow/buy another set of carbs, bolt them on, and see how it is? Rebuilding can get involved.

Andrew