When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.
My 4180 is leaking at what appears to be the float bowl screw. (thought it was the accelerator diaphragm originally but I saw fuel coming out from the screw)
Looking at Gary's site Holley 4180C - Gary's Garagemahal (the Bullnose bible)
It is I'm pretty sure 359747 BB-809 (screw) and 9592-A gasket
I'm not sure if it's B7a or E3p2 and what the difference is.
But I'll keep searching on that, if I remove this screw to replace the gasket, is it going to be that easy (if I can get it out with the carb on the truck)
Or will it mess up the carb such as the float adjustment? still learning carbs so this could definitely be a noob question.
I'm assuming the gasket is also right there flush with the screw head/face of carb and not internal.
If that gasket went bad, should I be looking at rebuilding this carb due to other gaskets probably failing soon?
Or could it be a one off?
That little gasket under the screw is included in the rebuild kits. First thing that is going to happen, as you loosen the screw fuel is going to go everywhere, it's going to drain the fuel bowl. So get a decent rag and stuff it in that area to try and soak the fuel up as best you can.
Once you get that mess cleaned up, you can take a sharp pick and dig the old gasket out. Then simply put the new one in and put the screw back in place. It's not going to affect anything else. It will be hard to start till the bowl fills back up with fuel.
well that's good to hear.
I see you can buy them separate as well. I'm going to see if I can source any locally tomorrow (haha hah yea right)
Thanks for the info.
If you take a spray can plastic top and pull 1 of the bottom screws you can use the top to catch the fuel that comes out so the mess will not be as bad.
It an old racers trick
Dave ----
nice tip, I usually use a beverage can and cut it in half, the aluminum bends to let you get in close.
But it can slice you open if not careful.
I sure miss the old school auto parts stores, No one carries these gaskets. I can drive to summit if I want I guess.
operation successful, made the drive to summit, gave them part # 108-98-10, no more leak from the screw.
Also bought a rebuilt kit for down the road, don't think it needs rebuilt just yet but I was there..
Word of warning, don't go in there with a lot of money, you will come out with none
edit to add, the screw felt loose actually, I probably could have tightened down some, the paper gasket looked fine.
much thinner than the nylon replacements as well.
Well found a new leak, this one by the fuel filter. Not sure what this is called a "cap" I guess.
The Holley manual doesn't show it as anything parts wise. So can it be fixed?
Weeps enough to cause a drip on the intake.
Also installed a new wix fuel filter, the old one was leaking at the gasket, well so is this one..
Not as bad but I don't dare tighten it down anymore for fear of cracking the carb.
I'm not sure if I should try and replace it with another gasket or live with it.
It's not as bad as that plug/cap I'm showing in the picture.
If I knew of an epoxy or something gas resistant that actually works I think I'd just smother it with it.
Anyone know of something?
At work we've always used JB weld to seal plugs like that that are inside carburetors that results in the bowls draining into the engine. mainly the soldered plugs on the quadrajunks. You would have to clean it quite well then take and fill the area with some JB weld. You might be able to try some of the two part epoxy, I think JB weld has some that is fuel resistant now. I don't know if the one I got is but I used it for repairing a hairline crack in a obsolete choke thermostat that you cant buy anymore. Set up fairly quick which would work good for you being its vertical.
JB weld is epoxy, I would try it. That is a hole they use at the factory for machining the carb body, and when they are done they permanently plug it with that plug.
JB weld is epoxy, I would try it. That is a hole they use at the factory for machining the carb body, and when they are done they permanently plug it with that plug.
Yep it is, I don't know what to call the other stuff JB weld has, they have the traditional that you mix the paste together then they have the glue like stuff that is in the two part epoxy syringe that you press down on the plunger it gives you proper mix ratio and you mix it and spread it. This stuff is a bit runnier than the old JB weld that is a bit more sticky and paste like.
And if what Rusty posted does not work you will need to replace that float bowl as that is the only way that plug comes.
Dave ----
yep there are a bunch of Holley 4180`s on ebay. I think I saw one Friday on ebay that had a broken choke housing for $50 which would be great as a parts carb for him.
This is the listing incase op wants to go this route instead.
thank you, didn't really think about going the 4180 replacement, thought about just replacing it completely though.
I forgot I had some quiksteel from blue majic laying around from when my 79 had some pinhole leaks.
It worked for a few months on it but eventually let go. Probably due to user error, didn't get it cleaned enough, still was dripping gas etc.
Anyway I used what I had left and so far it seems good to go.
I don't expect it to last long though because that stuff was a bit crumbly.
I will say since I've replaced that float bowl screw gasket, the truck starts like a dream. Don't even have to pump the gas or crank it to fill the bowl back up.
Even after sitting for a day or more it fires up almost instantly.
I might return my rebuild kit though if I find more leaks anytime soon.
Rezvani's Latest Post-Apocalyptic Monster Is a Ford F-150 Raptor Underneath
Slideshow: Called the Fortress, the 850-horsepower pickup combines Raptor underpinnings with military-inspired features, survival equipment, and a starting price of $285,000.
