Fuel pump, repairable?
Thread Starter
Instructor
Joined: Dec 2013
Posts: 222
Likes: 1
From: Tampa Fl
St. Jude Donor '14
Fuel pump, repairable?
I've been smelling gas after I turn the car off. Pretty much ever since I got it. It seems pretty obvious I have the source now. Those are small bubbles coming out of the side of the fuel pump you can see in the picture. I am assuming there is a gasket right at that point were two parts of the gas pump meet each other.
Is this something to repair or to replace?
Is this something to repair or to replace?
Le Mans Master
Joined: Oct 2006
Posts: 7,123
Likes: 433
From: Gladstone MO
C3 of Year Finalist (appearance mods) 2019
That looks like it might be an aftermarket pump that could be rebuildable. IF you can find a diaphragm and the check valves. I'd think you'd be $$ ahead to stop by you favorite parts store and get an OEM replacement unless you have some need for the aftermarket pump.
Thread Starter
Instructor
Joined: Dec 2013
Posts: 222
Likes: 1
From: Tampa Fl
St. Jude Donor '14
Thanks guys. It's not original motor and has a couple of "upgrades" including this pump. I will look underneath first to see if there are screws.
After that we'll figure out the best option. I am afraid to drive it now that I see that though... Last thing I need is a fire.
Sometimes it has choked out under my lead foot like it was fuel starved... I am assuming this is the source of that and of the long staring cycle when it hasn't run in a couple of days. I assume the line above the pump is draining out.
After that we'll figure out the best option. I am afraid to drive it now that I see that though... Last thing I need is a fire.
Sometimes it has choked out under my lead foot like it was fuel starved... I am assuming this is the source of that and of the long staring cycle when it hasn't run in a couple of days. I assume the line above the pump is draining out.
Melting Slicks
Joined: Oct 2013
Posts: 2,569
Likes: 126
From: San Diego California
Fuel leaks aren't anything to mess around with.
I found a Delco 41240 on eBay for forty bucks last week. Maybe you may too.
EDIT: eBay item number: 371064002635
Jump on it.
I found a Delco 41240 on eBay for forty bucks last week. Maybe you may too.
EDIT: eBay item number: 371064002635
Jump on it.
Last edited by Cavu2u; Jun 15, 2014 at 02:55 PM.
Le Mans Master
Joined: Mar 2008
Posts: 5,948
Likes: 72
From: Oxford MA-----You just lost the game!!!!
I found this AC Delco 41240 fuel pump for $29.40.
http://www.autopartstomorrow.com/par...mech-fuel-pump
I would be willing to buy it, and sell it to you for 40 bucks.
Scott
http://www.autopartstomorrow.com/par...mech-fuel-pump
I would be willing to buy it, and sell it to you for 40 bucks.
Scott
Melting Slicks
Joined: Oct 2013
Posts: 2,569
Likes: 126
From: San Diego California
I found this AC Delco 41240 fuel pump for $29.40.
http://www.autopartstomorrow.com/par...mech-fuel-pump
I would be willing to buy it, and sell it to you for 40 bucks.
Scott
http://www.autopartstomorrow.com/par...mech-fuel-pump
I would be willing to buy it, and sell it to you for 40 bucks.
Scott
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Intermediate
Joined: May 2014
Posts: 48
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I've been smelling gas after I turn the car off. Pretty much ever since I got it. It seems pretty obvious I have the source now. Those are small bubbles coming out of the side of the fuel pump you can see in the picture. I am assuming there is a gasket right at that point were two parts of the gas pump meet each other.
Is this something to repair or to replace?
Attachment 47804396
Attachment 47804397
Is this something to repair or to replace?
Attachment 47804396
Attachment 47804397
Thread Starter
Instructor
Joined: Dec 2013
Posts: 222
Likes: 1
From: Tampa Fl
St. Jude Donor '14
I will replace it. Agreed that a fuel leak is nothing to play with.
Hopefully it won't be down too long. It really can be a while between times that I can work on it between work and kids.
Good news is this part is cheap ! I will report back once I replace it.
No one commented on the contribution of this type of failure to the two issues I have had. Choking like its fuel starved and long starting cycle after sitting even one day. Too obvious? Would like to feel confident I am solving more than the leak while I wait for the part and the time
Hopefully it won't be down too long. It really can be a while between times that I can work on it between work and kids.
Good news is this part is cheap ! I will report back once I replace it.
No one commented on the contribution of this type of failure to the two issues I have had. Choking like its fuel starved and long starting cycle after sitting even one day. Too obvious? Would like to feel confident I am solving more than the leak while I wait for the part and the time
Melting Slicks
Joined: Oct 2013
Posts: 2,569
Likes: 126
From: San Diego California
69Bones,
I've seen it in threads here that the hard line (up to the carb) can cause damage to the pump if bent too much in the installation process. Just something to be aware of. Don't want you to have to buy TWO new pumps.
Steve
I've seen it in threads here that the hard line (up to the carb) can cause damage to the pump if bent too much in the installation process. Just something to be aware of. Don't want you to have to buy TWO new pumps.
Steve
Thread Starter
Instructor
Joined: Dec 2013
Posts: 222
Likes: 1
From: Tampa Fl
St. Jude Donor '14
Thanks for the tips guys!
My car has an Edelbrock performer setup. Is there an advantage to buying the "performance" fuel pumps? Or is this marketing?
I believe this is the carb I have less the electric choke...http://www.summitracing.com/parts/edl-1406
I see the difference is in GPH at 80 or 110 and 6 or 8 psi......will the AC Delco work just the same I can't find any specs.
http://www.summitracing.com/parts/ed...make/chevrolet
http://www.summitracing.com/parts/su...make/chevrolet
What is the drawback of not using the return line to the tank?
It was there for a reason I know. So if I go back to an OEM pump to get whatever benefit that provided will the carb still be getting what it needs to perform as well as it can?
Thanks for bearing with me with all my questions!
My car has an Edelbrock performer setup. Is there an advantage to buying the "performance" fuel pumps? Or is this marketing?
I believe this is the carb I have less the electric choke...http://www.summitracing.com/parts/edl-1406
I see the difference is in GPH at 80 or 110 and 6 or 8 psi......will the AC Delco work just the same I can't find any specs.
http://www.summitracing.com/parts/ed...make/chevrolet
http://www.summitracing.com/parts/su...make/chevrolet
What is the drawback of not using the return line to the tank?
It was there for a reason I know. So if I go back to an OEM pump to get whatever benefit that provided will the carb still be getting what it needs to perform as well as it can?
Thanks for bearing with me with all my questions!
Melting Slicks
Joined: Oct 2013
Posts: 2,569
Likes: 126
From: San Diego California
Thanks for the tips guys!
My car has an Edelbrock performer setup. Is there an advantage to buying the "performance" fuel pumps? Or is this marketing?
I believe this is the carb I have less the electric choke...http://www.summitracing.com/parts/edl-1406
I see the difference is in GPH at 80 or 110 and 6 or 8 psi......will the AC Delco work just the same I can't find any specs.
http://www.summitracing.com/parts/ed...make/chevrolet
http://www.summitracing.com/parts/su...make/chevrolet
What is the drawback of not using the return line to the tank?
It was there for a reason I know. So if I go back to an OEM pump to get whatever benefit that provided will the carb still be getting what it needs to perform as well as it can?
Thanks for bearing with me with all my questions!
My car has an Edelbrock performer setup. Is there an advantage to buying the "performance" fuel pumps? Or is this marketing?
I believe this is the carb I have less the electric choke...http://www.summitracing.com/parts/edl-1406
I see the difference is in GPH at 80 or 110 and 6 or 8 psi......will the AC Delco work just the same I can't find any specs.
http://www.summitracing.com/parts/ed...make/chevrolet
http://www.summitracing.com/parts/su...make/chevrolet
What is the drawback of not using the return line to the tank?
It was there for a reason I know. So if I go back to an OEM pump to get whatever benefit that provided will the carb still be getting what it needs to perform as well as it can?
Thanks for bearing with me with all my questions!
Just me: I would go with a stock AC Delco and be done with it. Keep that return line function.
Steve
Thread Starter
Instructor
Joined: Dec 2013
Posts: 222
Likes: 1
From: Tampa Fl
St. Jude Donor '14
I am not drag racing on any track for sure but part of the fun is building and maintaining a machine that performs as well as it can.
...and maybe I do run it up in RPM with my foot flat on the floor once in a while
That AC Delco would probably get it done. Just wish it had some specs. At that price I guess I could give it a spin but would love some confirmation its flow and pressure are right for my setup.
...and maybe I do run it up in RPM with my foot flat on the floor once in a while
That AC Delco would probably get it done. Just wish it had some specs. At that price I guess I could give it a spin but would love some confirmation its flow and pressure are right for my setup.
Race Director
Joined: May 2006
Posts: 18,689
Likes: 2,572
Fuel Pump
Thanks for the tips guys!
My car has an Edelbrock performer setup. Is there an advantage to buying the "performance" fuel pumps? Or is this marketing?
I believe this is the carb I have less the electric choke...http://www.summitracing.com/parts/edl-1406
I see the difference is in GPH at 80 or 110 and 6 or 8 psi......will the AC Delco work just the same I can't find any specs.
http://www.summitracing.com/parts/ed...make/chevrolet
http://www.summitracing.com/parts/su...make/chevrolet
What is the drawback of not using the return line to the tank?
It was there for a reason I know. So if I go back to an OEM pump to get whatever benefit that provided will the carb still be getting what it needs to perform as well as it can?
Thanks for bearing with me with all my questions!
My car has an Edelbrock performer setup. Is there an advantage to buying the "performance" fuel pumps? Or is this marketing?
I believe this is the carb I have less the electric choke...http://www.summitracing.com/parts/edl-1406
I see the difference is in GPH at 80 or 110 and 6 or 8 psi......will the AC Delco work just the same I can't find any specs.
http://www.summitracing.com/parts/ed...make/chevrolet
http://www.summitracing.com/parts/su...make/chevrolet
What is the drawback of not using the return line to the tank?
It was there for a reason I know. So if I go back to an OEM pump to get whatever benefit that provided will the carb still be getting what it needs to perform as well as it can?
Thanks for bearing with me with all my questions!
If you read the manual for your carburetor it states the maximum fuel pressure should be 6.5 PSI
Le Mans Master
Joined: Oct 2006
Posts: 7,123
Likes: 433
From: Gladstone MO
C3 of Year Finalist (appearance mods) 2019
FWIW: My 69 has a 454- the LS-7 version crate engine. At one time it had a crate L-88 in it that was installed under warranty when the original L-89 let go. (Creative talking to the dealer, but that's another story)
All 3 engines have had a standard, stock-as-a-stick over the counter GM pump. Never had any issues with fuel starvation. As MelWff pointed out- fuel pressure should be 6.5 psi or close to it. More than that will probably push fuel right past the carb float, much less and it won't be able to keep up with engine demands.
And the flip side is the price- $70.+ for an aftermarket pump vs. $30 for the stock one.
All 3 engines have had a standard, stock-as-a-stick over the counter GM pump. Never had any issues with fuel starvation. As MelWff pointed out- fuel pressure should be 6.5 psi or close to it. More than that will probably push fuel right past the carb float, much less and it won't be able to keep up with engine demands.
And the flip side is the price- $70.+ for an aftermarket pump vs. $30 for the stock one.
Le Mans Master
Joined: Mar 2008
Posts: 5,948
Likes: 72
From: Oxford MA-----You just lost the game!!!!
Thanks for the tips guys!
My car has an Edelbrock performer setup. Is there an advantage to buying the "performance" fuel pumps? Or is this marketing?
I believe this is the carb I have less the electric choke...http://www.summitracing.com/parts/edl-1406
I see the difference is in GPH at 80 or 110 and 6 or 8 psi......will the AC Delco work just the same I can't find any specs.
http://www.summitracing.com/parts/ed...make/chevrolet
http://www.summitracing.com/parts/su...make/chevrolet
What is the drawback of not using the return line to the tank?
It was there for a reason I know. So if I go back to an OEM pump to get whatever benefit that provided will the carb still be getting what it needs to perform as well as it can?
Thanks for bearing with me with all my questions!
My car has an Edelbrock performer setup. Is there an advantage to buying the "performance" fuel pumps? Or is this marketing?
I believe this is the carb I have less the electric choke...http://www.summitracing.com/parts/edl-1406
I see the difference is in GPH at 80 or 110 and 6 or 8 psi......will the AC Delco work just the same I can't find any specs.
http://www.summitracing.com/parts/ed...make/chevrolet
http://www.summitracing.com/parts/su...make/chevrolet
What is the drawback of not using the return line to the tank?
It was there for a reason I know. So if I go back to an OEM pump to get whatever benefit that provided will the carb still be getting what it needs to perform as well as it can?
Thanks for bearing with me with all my questions!
If you decide to install a new pump, install new rubber fuel lines from the tank-to-pump hard line to the pump. Here is an example of what you need:
http://www.ecklerscorvette.com/corve...1970-1981.html
Don't try to cheese it and use rubber fuel line from the roll down at the automotive parts store, the bends are too severe, it'll kink. Get the formed line, like in the link above. Might as well replace the fuel filter while you're at it. Good luck,
Edit: Forgot to say, yeah, a stock pump is all you need.
Scott
Last edited by scottyp99; Jun 16, 2014 at 08:13 PM.
Thread Starter
Instructor
Joined: Dec 2013
Posts: 222
Likes: 1
From: Tampa Fl
St. Jude Donor '14
I found this AC Delco 41240 fuel pump for $29.40. http://www.autopartstomorrow.com/par...mech-fuel-pump I would be willing to buy it, and sell it to you for 40 bucks. Scott
Scott but I do see it for about the same elsewhere. Funny thing is that the sites all show this starting as the pump for 1970. I also see multiple pictures of of on the same ad on Amazon with the **** facing different directions in each pic. Can someone send me a pic of this pump and hoses installed?
I want to pick up a 90 degree fitting up front if I need one....and anything else too. The hoses installed in my car now are just long enough to make it to the location of the aftermarket pump I have and the location of the in/outlets.
Thread Starter
Instructor
Joined: Dec 2013
Posts: 222
Likes: 1
From: Tampa Fl
St. Jude Donor '14
Haha..you know what else I realize is probably more important.....
From when I was verifying numbers the engine block info is : "255 HP 4 bbl 350 truck engine built in Flint Michigan on Nov 30 1970 for a pickup with automatic transmission."
So I believe I am right back to the 41240. Still would like a pic of someone else's installation to confirm which way the hoses routed.
From when I was verifying numbers the engine block info is : "255 HP 4 bbl 350 truck engine built in Flint Michigan on Nov 30 1970 for a pickup with automatic transmission."
So I believe I am right back to the 41240. Still would like a pic of someone else's installation to confirm which way the hoses routed.