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I noticed a pool of fuel on the intake manifold just under the carburetor filter. It seems to becoming from the area I've pointed out in the picture. Does anyone know if this can repaired with a kit or something along those lines?
Thanks, Al
Last edited by ONeill202; Nov 4, 2016 at 06:01 PM.
I noticed a pool of fuel on the intake manifold just under the carburetor filter. It seems to becoming from the area I've pointed out in the picture. Does anyone know if this can repaired with a kit or something along those lines?
Thanks, Al
Hi Al,
I'm feelin' your pain. This very thing happened to me on my 73. You'll probably get many opinions of how to have it repaired. I know I had quite a few when I posted my problem on the NCRS TDB. Many suggested various epoxies like JBWeld for example. I tried it and it started leaking after a couple months. Unlike others who swear by JBWeld I have absolutely no luck at all with it!!!
So I ended up having my mechanic tap it, and thread in a plug with Loctite. It has not leaked a drop since, and it's been over a year. Not noticeable at all with the 73 dual snorkel air cleaner installed.
Here are a couple of pics of both repairs, and an example of a professionally restored carb.
Good luck with whatever option you choose!
Regards,
Jimmy
The circular item you are pointing at is a well plug. These wells are at several places on and in the carb body. Mine was leaking also and I bought some Loctite gas tank repair putty. This is a 2 part putty and you just cut a small piece off and knead with your fingers until the 2 parts form a uniform color. Clean the area to be fixed with carb cleaner and let it dry thoroughly before pressing the patch into the area. You have about 10 minutes working time to get the putty in and it will cure in 16-24 hours.
A thought you might consider is, if this well is leaking chances are that some of the inner body wells are leaking also. Leaking inside will not cause a mess you can see but it will affect idle and off idle performance of the carburetor. It sometimes makes the car hard to start after sitting for a while because the fuel bowl empties and it takes a crank or 2 for the pump to fill it back up.
Jerry
The circular item you are pointing at is a well plug. These wells are at several places on and in the carb body. Mine was leaking also and I bought some Loctite gas tank repair putty. This is a 2 part putty and you just cut a small piece off and knead with your fingers until the 2 parts form a uniform color. Clean the area to be fixed with carb cleaner and let it dry thoroughly before pressing the patch into the area. You have about 10 minutes working time to get the putty in and it will cure in 16-24 hours.
A thought you might consider is, if this well is leaking chances are that some of the inner body wells are leaking also. Leaking inside will not cause a mess you can see but it will affect idle and off idle performance of the carburetor. It sometimes makes the car hard to start after sitting for a while because the fuel bowl empties and it takes a crank or 2 for the pump to fill it back up.
Jerry
Thank you -- very informative. I do have hard start issues especially as after it has been sitting for a while, just like you described. I bought this carb used four years ago from a guy on eBay who spends his time rebuilding them. I'm not sure if a repair is worth the effort at this point. Maybe I should consider replacing it with an Edelbrock they don't seem too expensive.
From: At my Bar drinking and wrenching in Lafayette Colorado
I see this issue frequently on the carbs I build. The only way to permanently repair that is to drill out the leaking plug, tap the carb, and thread in a pipe plug. When I do this, I shorten the pipe plug so it will install below the surface of the carb, unlike the one shown by Tooch1 above. Once the plug is installed, I then give it a seal coat of JBWeld to cover and hide the plug, making the repair almost invisible. But the pipe plug is what retains the fuel pressure - not the JBWeld. The JBWeld cover coat, by itself, never works. I can do the repair for you if you'd like - e-mail me for info.
I see this issue frequently on the carbs I build. The only way to permanently repair that is to drill out the leaking plug, tap the carb, and thread in a pipe plug. When I do this, I shorten the pipe plug so it will install below the surface of the carb, unlike the one shown by Tooch1 above. Once the plug is installed, I then give it a seal coat of JBWeld to cover and hide the plug, making the repair almost invisible. But the pipe plug is what retains the fuel pressure - not the JBWeld. The JBWeld cover coat, by itself, never works. I can do the repair for you if you'd like - e-mail me for info.
Hi Lars,
Yes, my mechanic asked me if I wanted him to shorten the plug like you mention above but I was ok with it the way it is. I didn't want any more JB Weld on the carb, even though it wouldn't have been as noticeable. I would have received the same minimal deduct for the repair at judging anyway.
Regards,
Jimmy
From: At my Bar drinking and wrenching in Lafayette Colorado
...and the advantage with the protruding plug, of course, is that you can always remove it. Once you shorten it and cover it with epoxy, you're going to be machining it to get it out.
Since I have the carb out I'd like to examine the inner well seal to confirm if they have been sealed. Any advise on how to dig further into this baby will be greatly appreciated.
Al,
I would take 'lars' offer and get the information that he has written and tackle it yourself....if you feel this is in your ability. Or use the information from the PM I sent you.
I know I would not get another carb...but hat is just me. Having to mess with fuel line set-up configurations,adding a fuel filter in-line and other issues. Often times that are more trouble than they are worth and often times really do not provide that much more to the aspects on how the engine runs if it is a daily driver. Others may differ
I do like QuadraJet carbs and find there is nothing wrong with them if they are correct.
Hopefully you visually witnessed the fuel dripping out of the plug at the very front of the carb.....and it NOT leaking from the fitting for the fuel line.
I know this has nothing to do with the raw fuel in the intake. That fuel can easily be there due to the throttle linkage was moved when working on getting the carb off.
When I am pulling a carb off that has obvious problems...when I lift it off...I look and see if I can see that the plugs for the idle circuit areas are or have been leaking and I can see fuel stains or wetness. Often times due to the base plate gasket...I can see that it is wet or has been wet.
Rochester Quadrajet leaking fuel
