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quadrajet valve seat possible extra gasket? [message #245264]

Wed, 26 March 2014 20:39

Tilerpep

Messages: 404
Registered: June 2013
Location: Raleigh, NC

Karma: 7

Senior Member

In searching old forum posts, someone said there are sometimes old gaskets left under the carb float valve seat at the carb body.

For visible confirmation before I rip on this thing too hard:

https://dl.dropboxusercontent.com/u/2984589/valve%20seat%20gasket1.JPG

https://dl.dropboxusercontent.com/u/2984589/valveseatgasket2.JPG

There is a dark ring (pressed in?) above the cast threads which makes the contact point nearly level with the cast top edge. It looks fine, but if it is an old seal, or seals, I would be open to tips to remove them, as they have not wanted to come out with my current level of effort with a pick.

Symptoms that I am trying to resolve point to stuck or maladjusted float: bad mpg (5), visible gas just dripping and swirling above butterflies in main venture at all rpms.

I've checked timing, vacuum and for vacuum leaks several ways, but open to broader suggestions in addition to confirmation/denial that this seat gasket bore is atypical.

Thanks

1975 Glenbrook, 1978 Royale rear bath Raleigh, NC

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Re: quadrajet valve seat possible extra gasket? [message #245277 is a reply to message #245264]

Wed, 26 March 2014 21:33

WildBill

Messages: 232
Registered: January 2014

Karma: 1

Senior Member

Looks like some staining but you could use a brass brush or scotch rite to clean it if you want as long as you clean it out real well.

Do you have the needle hanger through one of the holes of the float or hanging on the front?

http://repairguide.autozone.com/znetrgs/repair_guide_content/en_us/images/0900c152/80/08/36/63//small/0900c15280083663.jpg

The fuel wells at the bottom of that piece can leak as well, carb drain down over night or days, empty bowl have to fill up float bowl again before it will start. Many methods to fix, hammer plugs in a bit and jb weld works pretty well. Wells on manifold vacuum so if leaking bad can cause rich.

Saturated float

[Updated on: Wed, 26 March 2014 21:41]

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