Upside Down 1976 onwards pumps...how do you fix a leak?

I need a little help. Got out of the garage today, and noticed a fuel pump leak.

My 81 Fox Mustang runs a D6DE 6749 AB fuel pump, the return of the pre 1967 straight 6 Bronco style 170cid fuel pumps.

It leaks in the three positions arrowed




Most of you guys know that the 1967 onwards pumps without the vaccum canister for windscreen wipers changed the rocker point from above to below the cam shaft, even though it was the same pump and block boss.

Same thing happened in 1976, Ford, like AMC I think, changed the way the fuel pump sat. The new Fox body's sat the engine right down low, and had to clear the new rack and pinion power steering unit, so to preempt it, Ford changed the pump orientation back to the 1966 system starting around 1976. All foxes run an engine mount stay which hits the 67-75 upside down pumps fuel inlet and outlet lines, and the Foxes ran ther engine mounts back about 4" from the stock X shell postion.

My pump looks just like the left hand pump (a 72 AMC 401 item), while the 1967-75's look like the later AMC 258 type.



Mine is leaking at the joint face, but mostly through the breather line below. I've heard these can be lead plugged, but often, the screws back out.

Is it just a screw that needs tightening up, or is the diaphrams shot, and I'm getting fuel in my oil as well as leaking out side?.

How do I repair it?


I could just go to a SBC Carter Super Strip fuel pump and fit the D6 DE 6749 AB arm like hasa68mustang post in http://classicinlines.com/fuelpump.asp, but I don't need 120 gallons per hour of flow at 9psi line pressure.

I'm mindfull that the 3.3 has gotten 33 years out of a stock FoMoCo pump, so it s okay to throw some bux at it, but that new replacements although only US$30, might not be as good

eg https://www.youtube.com/watch?v=M6F3TVzYbAs

X The diagram is shot, if you are able to find a rebuild kit you might be able to repair it. The only place I know of that might still have fuel pump rebuild kits was J.C. Whitney. Corse you could also fit your arm to a standard Carter SBC pump too. Good luck

Edit did not see the rebuild kits but they have new fuel pumps, 10% off sale too see link below. It's been said that if you can find a Catalog with the part number of the rebuild kits that they could still have those parts.

http://www.jcwhitney.com/airtex-fuel-pu ... 3y1981g2j1

Thanks bubba22349

I've got an Austrailian FPM-000A pre 1982 Bendix made Carter A31223 non bleedback pump off my 250 X-flow that I can bolt on, (Brand new Falcon / Cortina/Fairlane/LTD/Bronco/F100 fuel pump 79-82 XC,XD,TE,TF ) its a repairable item.

Its the normal replacement for 1968 to 1982 Aussie 188/200/221/250 log and 3.3/4.1 x-flow engines down here.



That was the year the new fuel return line FPM-008 Carter got put on the Alloy Head II engines. It was just a special anti perculation top on the previous Carter A31223. The new setup was similar to the US 4-BBL 4180C return line fuel pump in 5.0/5.8/370/460 engines




I love cross flow and Aussie gear, its really well engineered and nearly always repairable.

I Just don't like moving away from great, reliable US bits.

I've now got a Behr Cologne V6 radiator, a 1963 XM-1967 XR Falcon cylinder head, and now an 82 X-flow fuel pump.

Ok, its all FoMoCo, just German and Aussie Ford...

From the looks of X`s pump it is a crimp closed body.How pray tell,do you disassemble and re assemble a factory sealed unit?Seems like it would be easier and less trouble to just replace it.
Good luck.Have fun.Be safe.
Leo

Thats why there are the good old American throwaway 20 dollar items which are Diagnose & Replace, or the Aussie Ford/GM Holden Rebuildable US $ 60 item, A CLASSIC Diagnose and Rekit. each suits the economies of scale. I'd say a NOS # D6DE 6749 AB would be far more reliable than the Bendix Carter...untill it leaks.
Less parts, non rebuildable, more mass produced = more reliability.
More parts, rebuildable ( SEEhttps://www.americanautos.com.au/cgi ... tion=199VC ), less mass produced = less reliable.


I have seen a special clamp kit, but it won't help me replace the leaky diaphram on theUS pump.

I've got a special barb and flare fitting to mate the Aussie item to the US which has a smaller outlet than the US Fox 3.3 fuel line coupling, but the same internal diameter. The Auusie one has a reduced cross section at the outlet, so its inefficient and results in increased headloss and periodically increases pressure drop at the outlet. I'd like to retap it to US pump outlet, but that woulld tax the casting and maybee crack it. The US item maybe throwaway, but its a nicer design without high headloss outlet fittings of the Aussie item.


But maybee I'll end up with a 20 dollar US pump anyway.

On my computer, the cjponyparts.com website says

"Mustang Fuel Pumps - We Proudly Ship to New Zealand"

http://www.cjponyparts.com/1964-2013-mu ... oCIBnw_wcB

woodbutcher":8cif6yl7 said:

From the looks of X`s pump it is a crimp closed body.How pray tell,do you disassemble and re assemble a factory sealed unit?Seems like it would be easier and less trouble to just replace it.
Good luck.Have fun.Be safe.
Leo

Click to expand...

Woodbutcher, Lots of parts are suppose to be throw away items, however you can open the crimp up fairly easy to disassemble X's type fuel pump. And if you could find a good fuel resistant material you could also make a new Diaphragm too. Is it worth the trouble or is it easy? It's not very hard though it maybe is not worth the trouble.

Took NZ$ 17 of brass Titon fittings and some Gates SAE 30R7 5/16 7.9 MM line but I got it fitted.

The thickness of the pump, the manner in which the casting is situated, and how the rocker lever is sprung and situated is different from the US Carter Hi Flow 0 2438 and the Aussie Carter A 31223.

The Aussie Carter has a samller kind of outlet fitting which places the whole outlet 3-1/4" lower and 1-3/4" closer to the engine, so I decided to Gates hose it with a Large Barb 5/16 on 1/8" nipple, and a female 2" tall, 5/16 thick 1/8" connector.

Then use the Aussie long bolts to suit the thicker Aussie casting, and user the Aussie gasket, which is upside down.

Like the casting.

Which is what you'd expect since it came from Australia...


1. USCarter HI FLOW 02438 D6DE6759 Left vs AUS Bendix Carter A31223



2.AUS Bendix Carter A31223 withTiton 5_16th by 1_8th Female Log Connector and Titon Large Barbed Nipple 1_8 by 2 inch



3.Where the US Carter 0 2438 # D6DE 6759 AB was with Old gasket still on it and the stock rear dip stick D8 200 Fox Fuel Pump Block Boss.



4.AUS 1967 XR Falcon fuel pump boss for Bendix Carter A31223, a front sump, front dipstick engine with the same boss as the US 200.



5.AUS XA Falcon 200 talldeck Fuel Pump Block Boss for Bendix Carter A31223 is sligthly different, and you can't fit the US Fox or Bronco fuel pump to it easily because the casting is patterned against the earlier upside down pattern.



6.1982 XD Alloy Head Fuel Pump Boss...same as 1968 XT to the last 1992 XF Falcon utility 4.1 engine.



7.US Carter 0 2438 at top and AUS Carter a 31223 at bottom showing rocker arm configuration differences



8.Same as 7 but in a different dircetion.



9.Much lower AUS Carter a 31223 left bottom showing rocker arm configuration and "upsidedown" casting

Hi Bubba.Got to thinking after I posted about the crimp.Back about 50 years ago,there was an older gentleman that came up with all kinds of neat stuff to make his life of as a mechanic easier.He came up with a little tool to un crimp and re crimp things like that.Used a roller type setup.Worked real good too.
Good luck.Have fun.Be safe.
Leo

I've seen one type of kit before, they are like a dial gauge bezle retainer, with a clamp bolt at one end.


I've seen crimp kits, but not for this pump.


Our Aussie Carter pump is a rework of the old glass bowl type, and it was mass produced for General Motors Holden L6's, and Ford Australia just picked up the same parts for its I6's. Like the Dodge D series truck distributor and rotor. Holden even used the same bore spacings and Bosch starter motor windngs and just changed the castings.

Our Bosch made Motorcraft Durapark from 1980-1985 is the same as the GM Holden L6 so called HEI unit from 1980-1985, as was the 1973-1981 Chrysler Hemi 215/245/265 I6 solid state. All about economies of scale in a market too small to cover the costs of individul components. AMC using Ford Duraspark ignitions and fuel pumps and carbs is an exaple of what our Little Three had to do all the time.