Holley 4180 leaks
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Junior User
Joined: Oct 2005
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From: Arvada, CO
Holley 4180 leaks
rebuilt my 4180 on E-350 460 RV a couple of years ago, and all seemed ok last fall, last time I ran it. Now I have a leak at the accelerator pump as well as the fuel line input. I pulled the carb and inspected the acc pump gasket - looks intact and clean to me, reinstalled (green side up? - has a green side and a black side), changed the fuel inlet filter and gasket and reinstalled. Still leaks pretty significantly from the accelerator pump (weeps around the gasket as well as dripping from the actuator lever hole in the bottom of the plate. Also still leaks around the 1" fitting that holds the inlet fuel filter in place. New metal-like gasket was installed on this fitting.
Ideas to stop the leaks? Thanks in advance.
Greg
Ideas to stop the leaks? Thanks in advance.
Greg
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Joined: Aug 2002
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From: Southern California
If you are in Ca or in a state that uses alcohol enhanced fuels, you need to R&R the unit with the "green" one- it's alcohol resistant- the black is not and will just leak again.
the leak you have is kinda common...the only way I have every gotten one to stop is to use permatex hard setting glue (I know you're not suppose to glue a carb together) but in the past 30+ years, I have been at best lucky to get one to stop leaking there permamnently.
the leak you have is kinda common...the only way I have every gotten one to stop is to use permatex hard setting glue (I know you're not suppose to glue a carb together) but in the past 30+ years, I have been at best lucky to get one to stop leaking there permamnently.
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Junior User
Joined: Oct 2005
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From: Arvada, CO
Thanks - this one is the green one ... or at least matches the picture from the Holley site as the one approved for alcohol in the fuel. It's green on the fuel side and black on the arm/cover side. Just swapped in another new diaphram and now heading out to crawl in the maw of the beast to reinstall the carb.
Update - new diaphram installed, carb installed, hood latch imprint tatooed on my chest again ... no leaks.
Update - new diaphram installed, carb installed, hood latch imprint tatooed on my chest again ... no leaks.
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