holley 4160 accelerator pump
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Team Owner
Joined: Feb 2003
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From: Sitting in his Nowhere land Hanover Pa
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holley 4160 accelerator pump
would there be a route cause why the accelerator pump gasket on my Chevelle 4160 Holley carb has failed over the winter and for the second time in eight years since it was restored? or should I just replace it and move one? no other gasket in the carb has failed in that time. so now on this great weather day in central Pa I can't enjoy my car as no auto parts store keeps those gaskets in stock anymore.
Le Mans Master
Joined: Nov 2015
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From: Really Central IL Illinois
Are you using the large volume accelerator housing with a standard volume diaphragm? Is the diaphragm failing or the gasket which is part of the diaphragm.
I have had leaks at the accelerator pump after long time storage but just tighten the screws and it seals back up. I assume you do have the split lockwasher on the screws.
I have had leaks at the accelerator pump after long time storage but just tighten the screws and it seals back up. I assume you do have the split lockwasher on the screws.
Thread Starter
Team Owner
Joined: Feb 2003
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From: Sitting in his Nowhere land Hanover Pa
2024 C2 of the Year Finalist - Unmodified
2015 C2 of Year Finalist
its part of the diaphragm and its a pin hole leak as it squirting fuel past the rad support. the screws are recessed style with clutch head. I can't get to the screws due to the intake and would have to remove the fuel bowl or carb to get to them . its the oem style volume diaphragm.
Thread Starter
Team Owner
Joined: Feb 2003
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From: Sitting in his Nowhere land Hanover Pa
2024 C2 of the Year Finalist - Unmodified
2015 C2 of Year Finalist
the first time this happened I had to go buy a clutch head screwdriver bits to remove them. I was just more concerned if there is more to it then just replacing it or if I have a underlying problem. looking on summit I don't see them, but Holeys web site list two. since I don't know which one I need I'll call Phill who restored the carb on monday and I'll buy what I need from him, he is really good about this sort of stuff. I am just more frustrated that I can't enjoy my car today
Le Mans Master
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From: Western Massachusetts
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Both of my Hollies presented accelerator pump leaks last season. Bit the bullet, pulled, cleaned and re-gasketed both carbs, new pumps. Both carbs hadn't had attention in 10 years so I guess that's all we can expect.
Dan
Dan
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Thread Starter
Team Owner
Joined: Feb 2003
Posts: 54,155
Likes: 9,464
From: Sitting in his Nowhere land Hanover Pa
2024 C2 of the Year Finalist - Unmodified
2015 C2 of Year Finalist
joys of owning a restored car. They are never done. On a side note when I pulled the air cleaner off the gasket on top of the carb to the air cleaner crumbled in my hand. Knock on wood I don't find any more
Race Director
Joined: May 2006
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You made no mention of the ethanol content of the gasoline.
Try these for high ethanol.
https://www.summitracing.com/parts/h...BoCCmoQAvD_BwE
Try these for high ethanol.
https://www.summitracing.com/parts/h...BoCCmoQAvD_BwE
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