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#1
06-06-2021, 06:32 PM
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carb jet removal
I have an AFB that someone completely screwed up. It was assembled wrong and besides other problems it needs the primary metering jets. There lies the problem. That someone broke the slots off the top of the jet where you place a screwdriver. I tried taking it out with an "easy out" with no luck. It just slips in the hole. It will be a good carb if I can remove the jet without destroying the carb. Any thoughts?
If I can get the jet out can I use Edelbrock's jets? Thanks |
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#2
06-06-2021, 07:37 PM
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Just soft metal so good machinist should be able to drill out. I'd go a little small and see if could just remove the ring and not screw up the threads.
ps you mean one of these ? |
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#3
06-06-2021, 10:26 PM
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If it's corrosion holding it in, then heat is going to be your friend.
Heat the casting with a propane torch, and quench it with water. That will usually break a corrosion bond. Sometimes it takes more than one attempt with heating and quenching to get the corrosion broken loose. Keep using the eazy out and you can also try tapping on the eazy out while attempting to unscrew it. Shocking the part also helps to break a corrosion bond. If it's cross threaded than drilling it out is probably going to be the only alternative. When you get it almost to the threads in the carb body you can collapse the rest of the soft brass jet with a pointed chisel into the center of the hole. It's tedious work, but gratifying to get the stuck part removed while saving the carb casting. Good luck on your efforts... 
__________________
Brad Yost 1973 T/A (SOLD) 2005 GTO 1984 Grand Prix 100% Pontiacs in my driveway!!! What's in your driveway? If you don't take some of the RACETRACK home with you, Ya got cheated    
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#4
06-07-2021, 09:15 AM
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What model of AFB?
__________________
66 GTO Nostalgia Super Stock/Street Legal Car 421 CID, stock block, Wenzler Intake, 2- Carter 750 AFB's, 3.90 Gears, Full Factory Interior, Full Exhaust, Stock Suspension 3750LBS 9.77@136.99 Multiple NSCA/NMCA World Champion 66 GTO 389 3x2, 4 speed, 4.33 gear, Montero Red 33K original Miles 67 GTO 2dr Post, 428, Tri Power, 3.55 Gears 80 Trans Am Black SE Y84 W72 WS6 |
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#5
06-07-2021, 02:59 PM
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Put the body on a mill table so you can get dead nuts on center, then ine up on each jet with HSS BS3 center drill, then drill with 1/4" bit, follow with 17/64" bit, then retap with a 5/16 NF 24 bottom tap.
You can also put heliocoils in there. |
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#6
06-07-2021, 08:28 PM
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Ok so much for removing the bad jet. Can I use the jets from Edelbrock's AFB style carb?
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#7
06-07-2021, 10:15 PM
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Slot it, remove it.
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#8
06-08-2021, 03:14 AM
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Quote:
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#9
06-08-2021, 08:07 AM
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Quote:
Jon.
__________________
"Good carburetion is fuelish hot air".  "The most expensive carburetor is the wrong one given to you by your neighbor". If you truly believe that "one size fits all" try walking a mile in your spouse's shoes! Owner of The Carburetor Shop, LLC (of Missouri). Current caretaker of the remains of Stromberg Caburetor, and custodian of the existing Carter and Kingston carburetor drawings. |
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#10
06-08-2021, 08:46 AM
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Left hand twist drill bit
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#11
06-08-2021, 03:47 PM
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The tag on the carb is not readable but I assume it's a 3300.
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#12
06-11-2021, 08:59 PM
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In case it helps someone in the future I removed the carb's jet by tapping a #T-15 Torx tip into it and it screwed right out.
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