The 1947 - Present Chevrolet & GMC Truck Message Board Network







Register or Log In To remove these advertisements.

Go Back   The 1947 - Present Chevrolet & GMC Truck Message Board Network > 47 - Current classic GM Trucks > The 1967 - 1972 Chevrolet & GMC Pickups Message Board

Web 67-72chevytrucks.com


Reply
 
Thread Tools Display Modes
Old 09-03-2012, 04:20 PM   #1
Fogline69
Registered User
 
Join Date: Aug 2012
Location: Santa Rosa, Ca
Posts: 30
Carb Leaking

Hi,

It was suggested I post a new thread for this by another user. I have a '69 C30 I just picked up and am trying to sort before harvest this fall.

Current issues:

1- Was running really rich. When I opened up the hood, I noticed the fuel filter looked like a really old one. Also, I noticed a fuel leak coming from the back secondary(?) throttle control. Not sure what brand carb this is. Researching this site, it sounds like a possible float issue, but not sure, and quite frankly not sure of the process for taking this apart to check.

Here is a pic of where it is leaking.

4 bbl - 350 - guessing Edelbrock

Any help/instructions on the process of taking this apart and putting it back together to check the float are appreciated.
Attached Images
 

Last edited by Fogline69; 09-03-2012 at 04:22 PM. Reason: add picture
Fogline69 is offline   Reply With Quote
Old 09-03-2012, 05:20 PM   #2
Wrenchbender Ret
Registered User
 
Join Date: Oct 2005
Location: Overland Park, Ks.
Posts: 5,229
Re: Carb Leaking

I need a photo of the whole carb to identify it. If it leaks out the throttle shaft it is a needle-seat/float problem. It looks like it might be a Holley. If so the needle & seat can be removed without removeing or disasemblying the carb.
Wrenchbender Ret is offline   Reply With Quote
Old 09-03-2012, 05:33 PM   #3
Fogline69
Registered User
 
Join Date: Aug 2012
Location: Santa Rosa, Ca
Posts: 30
Re: Carb Leaking

Quote:
Originally Posted by Wrenchbender Ret View Post
I need a photo of the whole carb to identify it. If it leaks out the throttle shaft it is a needle-seat/float problem. It looks like it might be a Holley. If so the needle & seat can be removed without removeing or disasemblying the carb.
That would be great! I kind of think it isn't though.
Here is a pic of the front. The numbers on the front are F3 9635 S

Thanks
Attached Images
 
Fogline69 is offline   Reply With Quote
Old 09-03-2012, 07:36 PM   #4
geezer#99
Registered User
 
geezer#99's Avatar
 
Join Date: Aug 2009
Location: Bowser
Posts: 13,731
Re: Carb Leaking

It's a 625 cfm carter AFB. Fuel pressure sensitive. THey don't like more than 5.5 psi.
geezer#99 is offline   Reply With Quote
Old 09-03-2012, 10:13 PM   #5
mr48chev
Registered User
 
mr48chev's Avatar
 
Join Date: Jul 2007
Location: Toppenish, WA
Posts: 15,708
Re: Carb Leaking

And it looks long past due for a rebuild from the looks of things. That is actually the carb that Edelbrock carbs were modeled after.
mr48chev is offline   Reply With Quote
Old 09-03-2012, 10:26 PM   #6
Fogline69
Registered User
 
Join Date: Aug 2012
Location: Santa Rosa, Ca
Posts: 30
Re: Carb Leaking

Thank you for the information. I am wondering whether it just makes more sense to buy a rebuilt Edelbrock on ebay for $150 or something rather than messing with it. Seems like it may drastically improve the performance of the engine and hopefully cut down the emissions. Any thoughts?

Thanks again to all!
Fogline69 is offline   Reply With Quote
Old 09-04-2012, 09:09 AM   #7
geezer#99
Registered User
 
geezer#99's Avatar
 
Join Date: Aug 2009
Location: Bowser
Posts: 13,731
Re: Carb Leaking

If you're gonna get another one just bite the bullet and get a new one.
Or get a rebuild kit and learn how to rebuild it.
You'll never learn how things work if you just do the remove and replace way.
geezer#99 is offline   Reply With Quote
Old 09-04-2012, 02:33 PM   #8
Fogline69
Registered User
 
Join Date: Aug 2012
Location: Santa Rosa, Ca
Posts: 30
Re: Carb Leaking

Quote:
Originally Posted by geezer#99 View Post
If you're gonna get another one just bite the bullet and get a new one.
Or get a rebuild kit and learn how to rebuild it.
You'll never learn how things work if you just do the remove and replace way.
I absolutely agree. I am running into a time issue though. The classic time vs money. Plus we don't want to put too much $ into this truck as we bought it to work, not play.

As it turns out, taking the top off and cleaning it a bit plus adjusting the choke seems to maybe have taken care of the problem. We will see once I get it really up to temp. Thanks for all the advice. I suspect either some of the linkage was so filthy that it was holding things open or there was dirt in where the pins are. The floats both floated. Perhaps we can squeeze some more life out of this thing.
Fogline69 is offline   Reply With Quote
Reply

Bookmarks

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not 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

Forum Jump


All times are GMT -4. The time now is 10:44 PM.


Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2024, vBulletin Solutions Inc.
Copyright 1997-2022 67-72chevytrucks.com