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#75251 03/22/2007 3:31 PM | Joined: Mar 2007 Posts: 16 Junior Member | | Junior Member Joined: Mar 2007 Posts: 16 | Can anyone tell me what this hole in my old carburetor is for?
[img]http://home.mchsi.com/~ohutchinson/carb-hole.jpg[/img]
-Owen
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#75252 03/22/2007 9:38 PM | Joined: Jun 2004 Posts: 8,597 Riding in the Passing Lane | | Riding in the Passing Lane Joined: Jun 2004 Posts: 8,597 | It,s a vent hole. It must be a realy old carb.
They say money can't buy happiness. It can buy old Chevy trucks though. Same thing. 1972 Chevy c10 Cheyenne SuperIn the Gallery Forum | | |
#75253 03/22/2007 11:01 PM | Joined: Mar 2007 Posts: 16 Junior Member | | Junior Member Joined: Mar 2007 Posts: 16 | Thanks Wrenchbender. Will it affect the operation of the carb? in other words should I plug it?
-Owen
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#75254 03/22/2007 11:10 PM | Joined: Dec 2005 Posts: 2,557 'Bolter | | 'Bolter Joined: Dec 2005 Posts: 2,557 | Hey wrenchbender,what does it vent ?
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#75255 03/22/2007 11:35 PM | Joined: Jul 2004 Posts: 5,708 'Bolter | | 'Bolter Joined: Jul 2004 Posts: 5,708 | It vents the bowl of the carburetor...the guts of the carburetor. I've never seen one like that! Does it have the angled brass tube in the throat too.
Stuart | | |
#75256 03/23/2007 6:57 PM | Joined: Mar 2007 Posts: 16 Junior Member | | Junior Member Joined: Mar 2007 Posts: 16 | Yeah, it has the brass tube. other than the vent hole it is pretty similar to my other Rochester, with the exception of a passage from the accelerator plunger tube into the main bowl that is regulated by a small ball bearing on one side and covered with a fine screen on the bowl side.
-Owen
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#75257 03/23/2007 7:22 PM | Joined: Jul 2004 Posts: 5,708 'Bolter | | 'Bolter Joined: Jul 2004 Posts: 5,708 | Kermit54,
I'm not the King-O-Carbs, but it sounds like that hole is something special, not just a vent.
Stuart | | |
#75258 03/25/2007 4:08 PM | Joined: Mar 2005 Posts: 637 Shop Shark | | Shop Shark Joined: Mar 2005 Posts: 637 | It was probably the result of a "home brewed" fix, to vent the float chamber. I'd say plug it up, all it will do is make a spot to spill gasoline on the manifold making a fire hazard. As long as the brass tube is clear that's all the vent you need. | | |
#75259 03/26/2007 12:07 AM | Joined: Mar 2006 Posts: 483 Shop Shark | | Shop Shark Joined: Mar 2006 Posts: 483 | | | |
#75260 03/26/2007 12:18 AM | Joined: Jul 2004 Posts: 5,708 'Bolter | | 'Bolter Joined: Jul 2004 Posts: 5,708 | I don't know what it is, but it doesn't look 'home brewed'...it has a nice cast margin around it and almost looks like it has a inner liner...not just a hole through the thin wall.
Stuart | | |
#75261 03/26/2007 3:14 AM | Joined: Mar 2007 Posts: 16 Junior Member | | Junior Member Joined: Mar 2007 Posts: 16 | Its clearly part of the original casting. I can't tell if it ever had anything in it (no visible signs). I just don't understand why you would need another vent hole in addition to the brass tube vent.
-Owen
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