Holleys 4160 fuel bowl leaking

[Keith B.]

On a Holley 4160 fuel bowl on the side where the fuel transfer tube goes from the front to back there is a metal push in plug. its leaking gas. what is the best method to fix it.

[Stephen L.]

Re: Holleys 4160 fuel bowl leaking

I placed a small amount of epoxy on the plug edge groove where it is leaking. It stopped the leak. I recently had my car judged at the Greenville Regional and lost a point; no big deal......if you are worried about that.

[Keith B.]

Re: Holleys 4160 fuel bowl leaking

The guy who restored/ rebuilt my carb used epoxy on this area and it worked well for the last eight years. But it started to leak and the epoxy came off. I got the area clean, dried and put some J B Weld epoxy on it. I really hope I don’t have to remove the bowl and create other areas to possible leak.

[Keith B.]

Re: Holleys 4160 fuel bowl leaking

I still have a slight leak even after new epoxy. is there a way to replace the welsh plug with something better that wont leak? is there enough material to have it drilled and taped for a NPT plug?

[Joe L.]

Re: Holleys 4160 fuel bowl leaking

I still have a slight leak even after new epoxy. is there a way to replace the welsh plug with something better that wont leak? is there enough material to have it drilled and taped for a NPT plug?

Keith------


Some Holley 4160 carbs having the same basic fuel bowl casting use a brass fitting fuel inlet which is tapped into the boss to which you are referring. So, it is possible to drill and tap as you suggest. However, I do not know the thread size or if there is an NPT thread size that will work. However, there is certainly some thread size that will work.

[Keith B.]

Re: Holleys 4160 fuel bowl leaking

Joe. Thanks he machine shop I work at should be able to drill and tap any thread I want but before I took the bowl off I wanted to make sure it’s all possible. This is for my 66 SS396 Chevelle.