Join Date: Jul 2011
Location: Cologne, Germany
no, there are no o rings there.
The throttle butterfly spindle sits in a bronze bushing either side.
I had a spare inlet plenum in the garage so took a photo....this is from an S4, but should be the same.
If the leak is really small it might not matter too much.
One could remove the butterfly and slide out the spindle and grease where it fits thru the bushes I suppose.
Dom - Alfa Spider 1990 S4 - formerly: Alfa 101 Sprint, 2600 Sprint, Montreal - family classics: Jensen Interceptor II, '58 Hooper RR Silver Cloud I, Shadow II, '60 Corvette.