Leaking Holley Carb

[haulna]

My Holley carb is leaking fuel. The fuel is pooling onto the intake manifold. Are the Holley carbs rebuildable to repair this situation? Should I trash it and buy a new carb?

[dion]

You could rebuild but If I were you I'd get another carb, and if you do, try a Q Jet.

[FRENCHBLUE72]

Looks like the throttle blades need to have bushings installed but im not sure im not a great mech.

[gizmo]

QUESTION After I shut my car off and come back out the next morning there is gas on the throttle shaft and puddled on the intake. What causes this?

ANSWER This is usually caused by percolation. This is when the engine is shut off and the engine temperature rises it causes the fuel to boil in the bowl and leak out of the boosters. There are a couple of things you can do to cure this one is make sure the fuel level is not too high. You can also lower the fuel level about 1/8" below the sight plug hole and this will cure it sometimes. The heat from the engine will rise into the carburetor sometimes and will cause the fuel to boil. Installing a phenolic heat spacer between the carburetor and the intake or a heat shield can cure this. These parts will prevent heat from getting to the carburetor and boiling the fuel.

Try this! I found it on a Holley trouble shooting page

[Tynee]

I like that color for the block & water pump.

[haulna]

Great info.

Does anybody have good suggestions for cleaning the stains off of the intake manifold? I was thinking about using break cleaner.

[67LongStepside]

the holley is rebuildable but the prob could probably be fixed w/ a spacer, but id get a carter q-jet and use muratic acid for the intake, you can get it at the hardware store

[mikep]

hydrochloric acid isnt going to do much for removing dried fuel stains on aluminum other than discolor the aluminum further. Soak it with spray on carburetor or brake cleaner ( not that God awful natural oil crap ) and then scrub it with an old tooth brush. Repeat a few times and blot up the excess before it dries. It'll come clean. It helps to seal fresh aluminum with clear paint before using to keep clean up to a simple chore. That type of holley is supposed to be relatively leak proof. Your fuel level is probably too high or your accelerator pump gasket is leaking .

[haulna]

Here is some info from the Holley site. I am going to try this first, if it doesn't work, I will try the phenolic heat spacer, followed up with a good cleaning.

Thanks again for the leads.

QUESTION How do I adjust the fuel level on my carburetor?

ANSWER Setting the fuel level should be the first thing you do before attempting to make any further adjustments.The float level should put the fuel level just below the bottom of sight plug hole. You will make the adjustment with the vehicle on a level surface and the engine idling. You will first remove the sight plug, then to make your adjustment you will need to loosen the lock screw on the needle and seat. This will allow you to turn the adjusting nut to raise or lower the float level. Each hex flat on the nut will change the float level approximatly 1/32". When you have the fuel level just below sight plug hole you will then tighten the lock screw and reinstall the sight hole plug. Make sure you have a shop towel handy in case you have any fuel leaks from the Sight plug or needle and seat adjusting nut.

[Low69CST]

Holley's are definately rebuildable. When I built my 400sb a few weeks ago i put an old holley my dad had on it. It woudln't run and gas ran out of the carb everywhere. A guy helped me rebuild the carb now the truck runs perfect and the carb doesn't leak a drop.