<VV> RE:Carb Vents

[Rad Davis]

Since you're The Carbmeister, have you considered nudging somebody to make 
these out of a different material?  It seems that something like viton or 
silicone might work better.

At 09:02 AM 12/10/2005 -0500, grant young wrote:
>I have probably seen just about every situation with carb base vents (have
>rebuilt over 4000 HV carbs now). Some have swollen and some have shrunk and
>hardened (much like their owners :-). I suspect that the swelling is due to
>spraying carb cleaner on the exterior of the carb (which is a no-no), or
>that they are affected by some engine cleaners (most of which say not to
>spray them on plastic or rubber). Some fuel leakage around the carb shaft
>might also affect the rubber seals. The most likely cause, however, is that
>they are subjected to severe heat changes. They are also flexed every time
>the throttle is closed and could therefore loosen over time. And, there is
>no way to tighten them on the car, which might be why GM used a sort of
>self-tapping screw to install them. I always replace the screws with new
>ones on rebuilds, just in case. Hope this helps,
>The Carbmeister

__________________________________________________________________________
Rad Davis:                                        rad.davis at comcast.net
Corvairs--65, 66 Corsa coupes, '65 'brier Deluxe   http://www.corvair.org/
Keeper of the Forward Control Corvair Primer: 
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"We did Nebraska in seven minutes today. I think that's probably the best 
way to do Nebraska."                            --Brian Shul, _Sled Driver_