I have a pretty steady fuel drip coming from the what I think is called a banjo bolt coming from the carb. It takes a 1 inch wrench. Where the fuel line attaches to carb. I took it off and it looks like a brass washer as well. The hardline fuel connection has seen better days too. Should replacing the washer fix the drip? I tried to remove the 1/2 inch connection that the hard fuel line is attached to. Couldn’t budge it. I need a vise. Want to clean it all up. Suggestions are appreciated.
With two wrenches, one on the big bolt and one on the line fitting, you ought to be able to squeeze the two together to loosen the fitting.
Replace the washer on the big bolt. You can use Permatex thread seal if necessary but it's usually not.
1950 Chevrolet 3100 (Ol' Roy)
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Per the other thread, the large fitting is sealed with the gasket/washer, the threads do not seal that type of fitting, a fuel filter is behind the fitting. The small fitting is inverted flare, as Otto has noted, two wrenches squeezed together should break it loose. Be gentle with the big fitting, the soft casting of the carburetor is easily damaged if the fitting is over-tightened, that is the purpose of the soft washer/gasket.
Last edited by 78buckshot; 05/23/202611:26 AM.
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If the hardline is getting replaced, cut it about 1 inch away from the big inlet fitting, then use a 1" socket on the large fitting to get it out. Once out, use a 7/16" or 1/2" socket on the line fitting while holding the large one with a socket or wrench. The inverted flare can really be tight sometimes, and having the whole mess off the carb in a vise can really help. Using two sockets and wrenches works pretty good also. The new style green or copper colored steel brake lines bend pretty easy without the use of a bender if you want to make a new fuel line. Don't use rubber for the whole line, only a couple inches worth at most to join two pieces if you need it. The 250 has the exhaust manifold right under the intake, fuel leaks on the exhaust is not what you want. It could be 1/4" or 5/16" fuel line, they used both sizes, yours looks like it's the bigger one. The carburetor repair kits use teflon type material or paper type gaskets for the big inlet fitting, you don't see copper used anymore. The new stuff is much softer and conforms to the area with out as much force needed.
What year is your engine / carb ? I have a couple of 1969 - '70 250 carbs if you get into trouble with yours you can use.
Just an added note to those above. Using good quality flare nut wrenches increase the chance of success in separating these pieces, with reduced chance of damage to the hex heads on both parts. If you go Joe H's route and cut the fuel line to use sockets to remove the big inlet fitting and separate the flare nut from the fitting, 6-point sockets will also lessen the chances of damaging either piece during disassembly.
Sounds like a good excuse to add to your tool box if they're not currently on-hand.
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Thanks to all who have replied. Used the two wrench method suggested by Otto. Worked like a champ. I bought a piece of the pre flared softer line. Its 5/16 inch. The washer was and still is an issue. I found some in the faucet repair aisle at Lowe’s. They werent metal or rubber. Still leaks.Im all set for a leaky faucet though. lol. I could use some direction on what and where to buy a washer that will work. Sometimes Im high maintenance. Sorry. I did splurge on a tube bender. I’m sure I’ll have to ruin a few pieces learning to measure curves and turns properly. I want to change the electric back to mechanical fuel pump. I’ll start another thread when I do, but I’ll definitely need to do some plumbing so the bender might come in handy.
Gdads51 traced the motor down to a 72 pontiac. I ask for parts for a 72 firebird with a 250 inline.lol. So far so good. I was all hung up on wanting to find an exact rubber coated brass copper replacement. Ended up buying the only thing that was the thickness and diameter. Wasn’t brass or rubber. lol. I appreciate the offer on the carb. I’m gonna try and get this one going. Definitely don’t want that fire though.
That fuel inlet gasket (washer) should be included in a carb rebuild kit. If you only want the gasket, you could try sending a PM to CarbKing to see if he can supply you with one.
That fuel inlet gasket (washer) should be included in a carb rebuild kit. If you only want the gasket, you could try sending a PM to CarbKing to see if he can supply you with one.
Fuel inlet gasket is the term I needed. Thank you. Multiple choices online. My only problem is choosing which one to get. lol
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Any auto parts store will have them, 7/8" thread diameter, Holley, Mr Gasket, Quick Fuel, they all fit as long as it's for 7/8" thread. Quadrajets used 7/8" and 1" threaded fittings, so just beware there are two sizes.
