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Another ridiculous fuel pump failure - 18 mo/ 1 mile
Posted by: cnicol ()
Date: February 05, 2018 07:34AM

Which is worse: No available fuel pumps or pumps that fail in short order?

I can't believe our fuel pump makers continue to make dangerous pumps that begin leaking after a short time.

When we(Corvair Center) found and I re-purchased my '66 Sprint (first car), it already had a fairly fresh, new fuel pump. That was fall of 2016. That pump leaked on arrival so I installed another new, fresh production (AC-Delco label) pump.

At the same time I replaced the fuel tank and of course put non-ethanol fuel in it.

Here we are in Spring of 2018, about 18 months later. It's been driven less than a mile, and now it's leaking like crazy.

I'll say it again: I'm so done with these POC pumps we're buying so it's "all-electric" for me until somebody makes a durable mechanical pump.hot smiley

Craig N. Coeur d'Alene ID.
66 Black Monza 4dr, 4.2L V8 49k
61 Seamist Jade Rampside 140 PG
60 Monza coupe (sold, sniff sniff)
66 Sprint Corsa convt - First car! Re-purchased 43 years later
2+2 gnatsuM 5691

+17 Tons of parts




Edited 1 time(s). Last edit at 02/06/2018 12:00PM by MattNall.

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Re: Another stupid fuel pump failure - 18 mo/ 1 mile
Posted by: Timothy Shortle ()
Date: February 05, 2018 07:49AM

18 months? "Too bad, your warranty is over". " Maybe you installed it wrong". "No one else has ever had this problem". "etc. etc.".
I agree Craig. This irritates me just to read it.

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Re: Another stupid fuel pump failure - 18 mo/ 1 mile
Posted by: moomba32 ()
Date: February 05, 2018 08:30AM

In addition to that I don't like the risk of fuel in the oil.

Don Marlowe
66 Monza 2Dr 140/pg
64 Spyder convertible now, 110/pg
Eutawville SC

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Re: Another stupid fuel pump failure - 18 mo/ 1 mile
Posted by: 66vairman ()
Date: February 05, 2018 08:42AM

Just not Corvairs - I had a few old cars with mechanical pumps that leaked fuel into the oil pan.

This is another case of a part that is no longer used on new cars so there are no big auto manufactures buying these parts and demanding quality.

I went to electric fuel pumps six years back and have no problems.

The added bonus is you can prime the carburetors without beating up the starter and battery.

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Re: Another stupid fuel pump failure - 18 mo/ 1 mile
Posted by: MoxyRamone ()
Date: February 05, 2018 08:57AM

My crappy mechanical fuel pump may have cost me an engine by leaking into the crankcase. Time will tell. If by some miracle my engine isn't toast, it will never get a stock fuel pump again!

John Carver
Simpsonville, South Carolina

1964 Monza Convertible


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Re: Another stupid fuel pump failure - 18 mo/ 1 mile
Posted by: red monza ()
Date: February 05, 2018 08:58AM

These days....NOTHING falls under the LAW OF MERCHANTABILITY LAWS....which I had in a law course years ago....but it simply states that a product should work as intended....which in this case, means it keeps your engine supplied with FUEL to the carbs....NOT THE OIL PAN.!!!

We consumers are being trained to accept anything anymore...even if it does not do what it is suppose to do....much less, last more than a week or so....and the courts, have a Max you can collect for anything...even if allowed to sue.

What the fuel pump manufactures need, is a CLASS ACTION LAWSUIT FOR causing damage to our corvairs and the rebuild costs associated with that.

Then, and only then, will they fix the fuel pumps to do what they are suppose to do and not suppose to do.

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Re: Another stupid fuel pump failure - 18 mo/ 1 mile
Posted by: SwedishVair ()
Date: February 05, 2018 09:29AM

Where does it leak and how ?
I've had similar problems with rebuilt pumps with kits from Clarks. Made me rinse out the interior of the pump, only using it as a splitter to the carbs and also installing an electrical pump in the wheel house. Looks stock unless you look really close.

"Growing old is mandatory, growing up is optional"

-64 convertible since -89.....-61 Rampside since -12

The vert is now 54 years old, most of them in Sweden with me and the missus as owners.

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Re: Another stupid fuel pump failure - 18 mo/ 1 mile
Posted by: David Malcolm ()
Date: February 05, 2018 10:49AM

Been thinking of going electric. SwedishVair mentions putting it in the wheel house which I take to be the wheel well where many instal a fuel filter. Is this a viable option or is it better up front by the tank?

David Malcolm
1969 Monza PG Coupe
NJ near the Meadowlands

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Re: Another stupid fuel pump failure - 18 mo/ 1 mile
Posted by: jasonscorvairs ()
Date: February 05, 2018 10:54AM

I've gone through 6 fuel pumps in past year. Haven't taken them apart yet. The vendor keeps warrantying them. Couple of them leak bad when you park on a hill with rear of car facing down. When I come out in morning my gas tank has drained all over the ground from the fuel pump. The Best fuel pump that I have is from The Source Corvair parts. Bought over 20 years ago and still works perfect in my daily driver.

68 Monza Coupe Palomino Ivory 140hp 4sp
68 Monza Coupe Grecian Green 110hp 4sp ( daily driver 28 years)
65 Monza 4 door 140hp PG
1989 Gmc Vandura full of corvair parts


Grand Forks BC

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Re: Another stupid fuel pump failure - 18 mo/ 1 mile
Posted by: toms73novass ()
Date: February 05, 2018 11:18AM

Any one getting good fuel pumps, that last? Where? I will be needing one in the near future for my build.....

-Tom


63' Monza Spyder Convertable (in process) MY Build Thread
65' Monza MY Build Thread
73' NovaSS 454 Big block
86' BMW 325es
98' Dodge 2500 12v Cummins Diesel with 1200 lb torque!
98' VW Jetta TDI, for daughter
01' Audi Allroad Stage 3 twin turbo

NFCC
Grand Island, NY

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Re: Another stupid fuel pump failure - 18 mo/ 1 mile
Posted by: oldqmguy ()
Date: February 05, 2018 11:29AM

The Corvair is a unique vehicle and Chevy/GM used it to introduce lots of 'new' ideas. smileys with beer

However, Mechanical Fuel Pumps were in use in ALL cars in those days so that was part of the 'Flat 6' engine design. drinking smiley

50 years later and things have changed. I changed to electric pumps on the previous two Corvairs I owned. My 'last'(?) Corvair, a 1967 Monza has a good mechanical pump and it runs well for now. eye rolling smiley

I hope to be able to install Ted's EFI system by years end, which will require an electric pump. In the event that my current mechanical pump fails, I will change to an electric pump. grinning smiley

I have always mounted them near the tank and have never had a problem with them. Then last one was on a Corsa Turbo (with a return line and a pressure regulator) and it worked!

I like the idea of moving the fuel lines out of the 'belt path' as well!

Just my crazy ideas! eye popping smiley

Dale cool smiley

Dale E. Smiley CPBE
Life Member The Society of Broadcast Engineers
RETIRED Broadcast Engineer
CERTIFIED CORVAIR NUT
CORSA/Circle City Corvairs/Corvair Performance Group
Avon, Indiana
WB9SFF
1967 4-Door Monza PG!

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Re: Another stupid fuel pump failure - 18 mo/ 1 mile
Posted by: 2ragtops ()
Date: February 05, 2018 11:38AM

IT seems that the diaphragm is usually the culprit.

Does anybody make the material to make new ones.

I have a friend who does CNC cutting, he could cut new ones if we had the right material

Bob Bauer

Show-Me Corvairs

1966 Monza Convert 140 P/G with A/C, plastic wheel with tele-column am-fm posi-traction
1966 Corsa Convert 180 wood wheel tele-column am-fm sport steering posi-traction
1965 Corsa Coupe Crown V8 mounted mid-body temporarily red lined for repair
House Springs, Missouri

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Re: Another stupid fuel pump failure - 18 mo/ 1 mile
Posted by: MattNall ()
Date: February 05, 2018 11:43AM

Although the diaphragm material has shrunk.... I believe it's the rough / uneven sealing surfaces that really cause the problem.





MODERATOR
Sea Mountain, between Charleston Harbor and Coos Bay! SW Oregon Coast
Click HERE for My Website...Click HERE for My TechPages!
..............................110-PG.................................................Webered-Turbo

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Re: Another stupid fuel pump failure - 18 mo/ 1 mile
Posted by: jjohnsonjo ()
Date: February 05, 2018 11:49AM

jasonscorvairs Wrote:
-------------------------------------------------------
> I've gone through 6 fuel pumps in past year.
> Haven't taken them apart yet. The vendor keeps
> warrantying them. Couple of them leak bad when you
> park on a hill with rear of car facing down. When
> I come out in morning my gas tank has drained all
> over the ground from the fuel pump. The Best fuel
> pump that I have is from The Source Corvair parts.
> Bought over 20 years ago and still works perfect
> in my daily driver.

Those pumps nearly put him out of business.

J.O.

65 Corsa Turbo Vert
79 Honda XL 500S
69 Honda CL 160 D
2010 BMW F 650 GS
2003 Bounder 36D
2013 KIA Optima SX turbo-AKA ZIPPY (wife,s car)
69 Newport Holiday Sailboat
Baja 150 dune buggy cart
Coleman HS 500 UTV
2016 KIA Sorento SXL Turbo

Bethlehem,Pa

Image and video hosting by TinyPic

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Re: Another stupid fuel pump failure - 18 mo/ 1 mile
Posted by: cnicol ()
Date: February 05, 2018 12:08PM

jjohnsonjo wrote: "The Best fuel
> pump that I have is from The Source Corvair parts.
> Bought over 20 years ago and still works perfect
> in my daily driver.

Those pumps nearly put him out of business."

Craig replies: The rest of the story:

Someone built a Corvair powered airplane. As I recall, the pump was relocated and ran off the flywheel at twice normal speed. The plane was sold, later crashed and the pilot died.

"The Source" was sued for wrongful death. Luckily for Mr. Herron, his pump was an exact, licensed copy of the original GM pump so GM and a team of lawyers came to his rescue. $Millions in lawyer fees later, his pump was exonerated but Mr. Herron said "nevermore" and thus went the GM pump design.

Craig N. Coeur d'Alene ID.
66 Black Monza 4dr, 4.2L V8 49k
61 Seamist Jade Rampside 140 PG
60 Monza coupe (sold, sniff sniff)
66 Sprint Corsa convt - First car! Re-purchased 43 years later
2+2 gnatsuM 5691

+17 Tons of parts

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Re: Another stupid fuel pump failure - 18 mo/ 1 mile
Posted by: larry202br ()
Date: February 05, 2018 12:14PM

David Malcolm Wrote:
-------------------------------------------------------
> Been thinking of going electric. SwedishVair
> mentions putting it in the wheel house which I
> take to be the wheel well where many instal a fuel
> filter. Is this a viable option or is it better up
> front by the tank?

Electric pumps pumps generally prefer to push, rather than pull. Placing it near the tank is best. I believe there was an article in a recent Communique, and Mike Dawson has a couple of articles on the HACOA website.

1961 rampside with a 65 / 67 110 engine, car four speed.
1965 convertible
1966 Custom two door/four door

KC0SKX
Olathe, ks
HACOA

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Re: Another stupid fuel pump failure - 18 mo/ 1 mile
Posted by: Spyderman64 ()
Date: February 05, 2018 12:43PM

I must be the luckiest Corvair owner in the world. I've had multiple Corvairs over the last 33 years and have never had a mechanical fuel pump fail on me. (I have had one or two cars that had bad pumps when I bought them, however.) Now that I've revealed this I'm sure the very next one I drive will fill the crankcase with gas and leave me stranded at the side of the road. Damn!

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Re: Another stupid fuel pump failure - 18 mo/ 1 mile
Posted by: moomba32 ()
Date: February 05, 2018 02:09PM

I have a mechanical pump that was on the car when I bought it about 12 years ago, when I swap it out I'll auction it off.smiling bouncing smiley

Don Marlowe
66 Monza 2Dr 140/pg
64 Spyder convertible now, 110/pg
Eutawville SC

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Re: Another stupid fuel pump failure - 18 mo/ 1 mile
Posted by: 4carbcorvair ()
Date: February 05, 2018 02:12PM

I had better luck with 40 year old used pumps than the new ones. Last mechanical I bought made about 700 miles. Put the 40 year old pump in. Best fuel pump IMO is electric. I put one in shortly after, been running it since 2006.

--------------------------------
Ronnie
Southern Maine.
www.dirigocorvairs.net
66 Corsa Convertible, 140, 4sp.
65 Monza Convertible, 110, PG.




It doesn't leak, it's marking it's territory.

A mirror is a reflection of the miles travelled.

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Re: Another stupid fuel pump failure - 18 mo/ 1 mile
Posted by: roger65180 ()
Date: February 05, 2018 02:27PM

I do still use mechanical pumps on my three corvairs when new is needed I dissasemble them stake the valves and have had to replace the bolts. on one pump the diaphram was not tight gas could go right up thru and out the vent on top of the pump cover I took it apart locked it in the vice and re peened the pin it is still working now , I have had electrics fail even leak I do agree we should not have to re work a new pump .

Roger R
Madison Wi
62 ct pg turbo
65intercooled 180 4sp,autocrosser
62 Rampy

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