Leaking Holleys - Hot Rod Forum : Hotrodders Bulletin Board
Hotrodders.com -- Hot Rod Forum



Register FAQ Search Today's Posts Unanswered Posts Auto Escrow Insurance Auto Loans
Hot Rod Forum : Hotrodders Bulletin Board > Tech Help> Engine
User Name
Password
lost password?   |   register now

Reply
 
LinkBack Thread Tools
  #1 (permalink)  
Old 03-10-2012, 04:04 PM
Registered User
 
Last photo:
Join Date: May 2006
Location: Napa , Ca.
Posts: 296
Wiki Edits: 0

Thanks: 0
Thanked 2 Times in 2 Posts
Leaking Holleys

I have 2 cars in my garage that don't get driven all the time, both with Holley double pumper carbs. After sitting awhile (a month or more) the gas leaks out of the float bowls into the engine and down to the oil pan. Anyone know if this leak can be stopped ? What is leaking inside these Holleys ? Do they need to be rebuilt ?
I do change oil often.

    Advertisement
Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
  #2 (permalink)  
Old 03-10-2012, 05:28 PM
Registered User
 

Last journal entry: My Last Hot Rod
Last photo:
Join Date: Oct 2011
Posts: 264
Wiki Edits: 0

Thanks: 15
Thanked 1 Time in 1 Post
Gaskets dry out after a few hours they will seal again when they get wet

My car did the same after a month or so I never bothered the change the gaskets. If I ran it every week it was ok
Reply With Quote Quick reply to this message
  #3 (permalink)  
Old 03-10-2012, 06:58 PM
lg1969's Avatar
Google "Tunnel Ram 406"
 
Last photo:
Join Date: Oct 2007
Location: Bohemia, L.I.N.Y.
Age: 64
Posts: 1,054
Wiki Edits: 0

Thanks: 1
Thanked 21 Times in 18 Posts
Check to see if the accelerator pump housing and diaphragm is seating properly. The four screw holding the bowls are tight. Sometime the metering block or the bowl may be warped. The throttle plate could be warped, too.
Reply With Quote Quick reply to this message
  #4 (permalink)  
Old 03-10-2012, 07:52 PM
painted jester's Avatar
TAKE A KID TO A CAR SHOW
 

Last journal entry: Take a kid to a car show
Last photo:
Join Date: Jan 2011
Location: Central Michigan
Age: 68
Posts: 1,789
Wiki Edits: 0

Thanks: 100
Thanked 273 Times in 223 Posts
Quote:
Originally Posted by 57halfton
I have 2 cars in my garage that don't get driven all the time, both with Holley double pumper carbs. After sitting awhile (a month or more) the gas leaks out of the float bowls into the engine and down to the oil pan. Anyone know if this leak can be stopped ? What is leaking inside these Holleys ? Do they need to be rebuilt ?
I do change oil often.
Halfton: Into the engine or onto the engine?

Jester
Reply With Quote Quick reply to this message
  #5 (permalink)  
Old 03-10-2012, 09:14 PM
Registered User
 
Last photo:
Join Date: May 2006
Location: Napa , Ca.
Posts: 296
Wiki Edits: 0

Thanks: 0
Thanked 2 Times in 2 Posts
Into the engine , no sign of leakage on the outside .
Reply With Quote Quick reply to this message
  #6 (permalink)  
Old 03-11-2012, 08:01 AM
Shaker455's Avatar
Registered User
 
Join Date: Mar 2009
Location: NH
Posts: 113
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
Are these older Holleys?

If there old & it's leaking down into the intake & engine then the gasket surfaces are warped from age and heat cycling.

They would need to be machined flat and if you don't have Powervalve protection then it should be added at the time of a rebuild.

We do that here on a regular basis.
Reply With Quote Quick reply to this message
  #7 (permalink)  
Old 03-11-2012, 10:04 AM
T-bucket23's Avatar
Hotrodders.com Moderator
 
Last wiki edit: Engine basic condition - how to check Last photo:
Join Date: Aug 2005
Location: Massachusetts
Age: 57
Posts: 5,151
Wiki Edits: 26

Thanks: 7
Thanked 109 Times in 94 Posts
Quote:
Originally Posted by 57halfton
I have 2 cars in my garage that don't get driven all the time, both with Holley double pumper carbs. After sitting awhile (a month or more) the gas leaks out of the float bowls into the engine and down to the oil pan. Anyone know if this leak can be stopped ? What is leaking inside these Holleys ? Do they need to be rebuilt ?
I do change oil often.
This is not a common problem with Holley's, are you sure it is leaking down and not just evaporating out of the bowl vent.
__________________
Artificial Intelligence is no match for Natural Stupidity



Chet
Reply With Quote Quick reply to this message
  #8 (permalink)  
Old 03-12-2012, 03:22 PM
painted jester's Avatar
TAKE A KID TO A CAR SHOW
 

Last journal entry: Take a kid to a car show
Last photo:
Join Date: Jan 2011
Location: Central Michigan
Age: 68
Posts: 1,789
Wiki Edits: 0

Thanks: 100
Thanked 273 Times in 223 Posts
I see your in California , check your vents Ive seen mud dobbers and other little critters build nests in vents, some times temperature cycles can create pressure that can override your needle & seats, How much gas is getting in the oil ? Conventional fuel pumps are usually the cause for gas in the oil!!! Not Holleys !! If it was a bowl leaking by the meter block and down the throat of the carb they only hold a few ounces in each bowl and being parked and not run, once the gas leaked to the level of the leak they wouldn't leak any more! But I have seen A car stored with a full tank of gas fill a crank case with gas through the fuel pump More then once!!! Especially these Chinese made K R A P !!!

Jester
Reply With Quote Quick reply to this message
  #9 (permalink)  
Old 03-12-2012, 05:36 PM
Registered User
 
Last photo:
Join Date: May 2006
Location: Napa , Ca.
Posts: 296
Wiki Edits: 0

Thanks: 0
Thanked 2 Times in 2 Posts
One Holley is an old one 25 years or so the other is 10 years old. Primary float bowls empty out into the engine then when I start them I have to crank the engine over for the fuel pump to fill the bowls so they will start.
Reply With Quote Quick reply to this message
  #10 (permalink)  
Old 03-12-2012, 06:40 PM
painted jester's Avatar
TAKE A KID TO A CAR SHOW
 

Last journal entry: Take a kid to a car show
Last photo:
Join Date: Jan 2011
Location: Central Michigan
Age: 68
Posts: 1,789
Wiki Edits: 0

Thanks: 100
Thanked 273 Times in 223 Posts
Your primary bowl might be empty but if its stored for any length of time the gas might just be evaporating Because of the bowl vents !!! If you leave a glass of water out in your garage for a length of time it will dry up And gas evaporates even faster !!!! Your carbs are probably not leaking!!! Its normal for gas to evaporate out of bowls. Most people who dont start carberate'ed cars during storage Know this! I Have to hook up batteries every spring and prime carburetors so they will start without cranking them forever to fill the carbs bowls ( the biggest cause of tar in carbereter bowls is evaporation of gas)!!! You said after they set a month or more I can guarantee you the gas evaporated from your holleys.

Jester

Last edited by painted jester; 03-12-2012 at 06:46 PM.
Reply With Quote Quick reply to this message

Recent Engine posts with photos

Quick Reply
Message:
Options

Register Now

In order to be able to post messages on the Hot Rod Forum : Hotrodders Bulletin Board forums, you must first register.
Please enter your desired user name (usually not your first and last name), your email address and other required details in the form below.
User Name:
If you do not want to register, fill this field only and the name will be used as user name for your post.
Password
Please enter a password for your user account. Note that passwords are case-sensitive.
Password:
Confirm Password:
Email Address
Please enter a valid email address for yourself.
Email Address:

Log-in

Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.




Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools

Posting Rules
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On


Similar Threads
Thread Thread Starter Forum Replies Last Post
Non adjustable float Holleys Irelands child Engine 1 11-09-2011 04:20 PM
Motorcrafts Holleys dirttrackjd Engine 1 08-17-2011 10:22 PM
94 holleys grapro Engine 1 09-13-2007 07:41 PM
please help me with tuning the dual holleys on my 355 darkostoj Engine 1 02-21-2007 12:44 PM
Painting my Holleys binder47 Engine 8 01-07-2007 12:36 AM


All times are GMT -6. The time now is 01:53 PM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2014, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.0 PL2
Copyright Hotrodders.com 1999 - 2012. All Rights Reserved.