General Category > Quadrajet Carb Talk and Tips
Leaking front plug on Chevy Q-Jet
markedmondson:
A friend in our Corvette club has a Q-Jet that is seeping gasoline from the plug that's located in the front of the fuel bowl, next to the fuel inlet. Maybe 3-4 drops per hour while running.
What's the best way to repair this? Is epoxy an effective and permanent fix? If yes, what type of epoxy is best? And should it be applied from the inside?
Or should the plug somehow be replaced?
BTW, the matching numbers Q-Jet I got on eBay last year for my Corvette and had Cliff repair still works like a champ!
markedmondson:
An added question: Does Cliff repair or replace this plug as a service? And can it be done in a way that retains the original appearance (for NCRS judging)?
Ethan1:
--- Quote from: markedmondson on December 27, 2015, 08:39:40 AM ---A friend in our Corvette club has a Q-Jet that is seeping gasoline from the plug that's located in the front of the fuel bowl, next to the fuel inlet. Maybe 3-4 drops per hour while running.
What's the best way to repair this? Is epoxy an effective and permanent fix? If yes, what type of epoxy is best? And should it be applied from the inside?
Or should the plug somehow be replaced?
BTW, the matching numbers Q-Jet I got on eBay last year for my Corvette and had Cliff repair still works like a champ!
--- End quote ---
The best way to repair this is to drill out primary well plugs, tap, use Marine-Tex and screw-in plug. You can do this yourself, if you have a drill, drill bit and #10-32 taper tap. You can buy the screw-in plug/Marine-Tex kit from kit for around $30. Pretty good price IMO.
My $.02, I would replace the secondary well plugs as well, since they come in the kit. Grind the "lip" off the plugs (doesn't take much, so be careful), drill small hole, use #10-32 self-tapping screw and some type of the puller, to pull the plugs out. I usually take my cutting pliers and put a little force on them and they usually come out fairly easy. If you have a 7/16-20 plug and bottoming tap, you are set. Use PLENTY of cutting oil as well. Pretty easy job.
Good luck!
Ethan1:
--- Quote from: markedmondson on December 27, 2015, 09:03:55 AM ---An added question: Does Cliff repair or replace this plug as a service? And can it be done in a way that retains the original appearance (for NCRS judging)?
--- End quote ---
I am sure he could repair it, too. In the NCRS judging, why would it matter? Do they take the carburetor off and check the plugs? Why would they do that?
carmantx:
Ethan, I believe he is talking about the front plug on the side fuel inlet Chevy carb, not the bottom plugs.
I use Marine Tex epoxy on outside to seal these. I have not tapped these to plug. Somebody else might chime in for correct original look fix.
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