Q-jet flooding bad???
Thread Starter
Burning Brakes
Joined: Jan 2009
Posts: 1,224
Likes: 1
From: Clarksville Indiana
dang it.. I propped the carb up tilted a little, I poured just a little gas in the bowl to cover the 2 holes with the needles in them, no gas in the other 2 holes.. it drips right away out of that right side on the bottom..
Thread Starter
Burning Brakes
Joined: Jan 2009
Posts: 1,224
Likes: 1
From: Clarksville Indiana
Ok heres pics of exactly whats going on.. with only enough gas to cover the two holes marked with arrows in the first pic, gas starts dripping from the area marked with arrows in the second pic.. what now?
Melting Slicks
Joined: Mar 2009
Posts: 3,126
Likes: 15
What I would do next is remove base plate. visually inspect main body to see if it is cracked or do fuel test again to see if well plugs are leaking. base will have to come off to repair body if it is poss. to repair. base is held on by two slotted screws seen in photo. laying low in TX. mds...
Race Director
Joined: Dec 2004
Posts: 15,032
Likes: 2
Pull the two screws and remove the base. Take a rag and dry the underside area. Set it up to where you can look at the bottom and pour a small amount of gas in the bowl. See exactly where the fuel is coming from.
Thread Starter
Burning Brakes
Joined: Jan 2009
Posts: 1,224
Likes: 1
From: Clarksville Indiana
Metering well plugs? are those the fittings that screw into the bottom of the bowl with the needles going into the holes in the center? So do what? take base off and look right there for a crack or something?
Race Director
Joined: Dec 2004
Posts: 15,032
Likes: 2
No. You are going to be looking here, but you need the base out of the way...
We already know the fuel is coming out of this general area. I want to know exactly where it is coming from. You need to dry it off first so you can tell exactly where the fuel is coming out of. A flashlight might help also.
We already know the fuel is coming out of this general area. I want to know exactly where it is coming from. You need to dry it off first so you can tell exactly where the fuel is coming out of. A flashlight might help also.
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Thread Starter
Burning Brakes
Joined: Jan 2009
Posts: 1,224
Likes: 1
From: Clarksville Indiana
Ok cool, I'll get a look this afternoon and see what I find. I dont think its leaking out of the plug, its dripping off the plug but I can see it coming from above it and running down.. I hope I can tell something when I get the bottom off. Thanks, I am going to figure this out even if I just toss it and buy a new one.
Thread Starter
Burning Brakes
Joined: Jan 2009
Posts: 1,224
Likes: 1
From: Clarksville Indiana
Ok mystery solved... first pic shows the JB or whatever gooped on the carb. The second pic shows the crack that was under the JB... I guess I should have taken the bottom off first.. is there any type of miracle crap that will stick/seal a crack like this?
Team Owner
Joined: Jan 2006
Posts: 37,637
Likes: 3,118
From: Crossville TN
Pehaps WhiteC3 will 'share' a little [or sell a bit] of that airplane fuel tank sealer he mentioned. I would send him a PM to request that. Obviously, the JB Weld won't work on that large of a crack. If you get some, try the tank sealer and bench test it well to assure a good seal. If you can't get that (or something similar that is made to seal off fuel leakage), you would do best to procure another body casting. Perhaps those with better knowledge will let you know what carb castings can be used in exchange for yours.
Hang in there, You've found the cause of the problem, you know the solution path(s); carb body castings aren't that difficult to come up with. You might want to e-mail Lars Grimsrud at V8fastcars@msn.com to see if he can give you specific advice on which castings will interchange [and if he has one he will part with]. Good luck.
Hang in there, You've found the cause of the problem, you know the solution path(s); carb body castings aren't that difficult to come up with. You might want to e-mail Lars Grimsrud at V8fastcars@msn.com to see if he can give you specific advice on which castings will interchange [and if he has one he will part with]. Good luck.
Thread Starter
Burning Brakes
Joined: Jan 2009
Posts: 1,224
Likes: 1
From: Clarksville Indiana
I think I'm leary of more epoxy the more I think about it. That stuff held ok a couple months before it let loose. Its got more of it on the other 2 plugs or screws near the leak, and its got a vac tube jb'd into the side of the carb. I think I wasted $125/150 on somebodys garbage, but it did run sweet at first.. So whats it look like to you guys? Was thing an acceptable repair that just happen not to work? Or did this guy bubba this thing and knew it?
Melting Slicks
Joined: Mar 2009
Posts: 3,126
Likes: 15
I do not think I personally would reuse that body. I agree with 7t1. Get with Lars. I am sure he can fix you up with a quality carb that closely matches what came on your car. Good job hanging tough with it. mds...
Race Director
Joined: Dec 2004
Posts: 15,032
Likes: 2
I would say it's been Bubba'd.
JBWeld will work to seal the plugs, but the carb has to be clean for it to work properly. JBWeld will NOT work at sealing that crack. While it may work to begin with, the heat/cold cycles would eventually break it loose.
JBWeld will work to seal the plugs, but the carb has to be clean for it to work properly. JBWeld will NOT work at sealing that crack. While it may work to begin with, the heat/cold cycles would eventually break it loose.
Thread Starter
Burning Brakes
Joined: Jan 2009
Posts: 1,224
Likes: 1
From: Clarksville Indiana
Well I started to buy a new holley early on but a forum member offered to build me a extra q-jet he had layin around, and I always have had better luck with q-jets over holleys. I never had a new one, I guess it should work ok for a while being new.. I think I only could find one that they make that will fit my stock intake.
Thread Starter
Burning Brakes
Joined: Jan 2009
Posts: 1,224
Likes: 1
From: Clarksville Indiana
I dont know about getting with Lars.. I know hes a legend, guru and hero to everybody, and I was glad to see him back.. but he seemed pretty annoyed by me and this thread when he posted in it.. I think I'll get on summit or jegs and see what I come up with on a new carb. I may still stop by this carb shop by me and see about another body..
