Fuel Pumps

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Page created by T June 20th 2008:

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Cutaway of AC Fuel Pump on an Holden 308 V8. A pivot in the the hole at the mounting flange works loose and can need tightening. Photo by Qute. Click to Enlargen.

Fuel Pumps:

V8 Fuel Pumps:

V8 Fuel Pumps operate using the same principle as 6 cylinder pumps.

Six Cylinder Fuel Pumps:

AC Fuel Pump With Air Pump:

This Fuel Pump came as standard equipment on grey Holden Engines from 48-215(FX) through to FB.From EK on the cars had electric wipers.

AC Fuel Pump:

This Fuel Pump came as standard equipment on grey and red Six Cylinder Holden Engines from EK - VB.

Carter Fuel Pump:

This Fuel Pump came as standard equipment on Carburettor Blue and Black Six Cylinder Engines.

AC Fuel Pump fitted to a 186 Engine. Click to Enlargen. Photo by The Red Baron.
 
The Goss manufactured AC Style Fuel Pump. It can be fitted as a replacement for the AC Glass Bowl Fuel Pump found on Red and Grey Engines. Click to Enlargen. Photo by Crocky.
 
Grey 138 cu in Holden Six Cylinder Engine most likely from FB since it has hydramatic gearbox and Vacuum Pump connections under the AC Fuel Pump for driving the Wipers. Click to Enlargen. Photo by merc9112006.
 
Carter Fuel Pump fitted to a 6 cylinder HZ Holden. Note the Intake Fuel Hose is secured by Hose Clamps. Click to Enlargen. Photo by Blue Tonner.
   
     

   

Carter Fuel Pump Components:

FuelPumpComponents.gif

Carter Fuel Pump Operation:

As long as the Floatbowl is full, the diaghram will stay in the downmost position holding pressure in the fuel line.

Pump Pressure And Gasket Thickness:

Changing the thickness of the gasket between the pump and the block can affect the fuel pump.A thick gasket will lower the fuel pressure by reducing the pump's stroke. A thin gasket will raise the fuel pressure by increasing the pump's stroke.

 
New Carter Fuel Pump suitable for grey/red/blue/black Six Cylinder Holden Engines. Click to Enlargen. Photo by T.
Oil leaking from the hole in the centre of the image indicates that the Spindle Seal is worn out. There will also be Oil thrown all over the offside Engine Mount. Click to Enlargen. Photo by T.
 
New Carter Fuel Pump suitable for grey/red/blue/black Six Cylinder Holden Engines. Click to Enlargen. Photo by T.
 
The Top Cover forms a pulsator that minimises pulsing in the supply line caused by the Diaghram. Click to Enlargen. Photo by T.
 
New Carter Fuel Pump suitable for grey/red/blue/black Six Cylinder Holden Engines.  Click to Enlargen. Photo by T.
 
Note the mounting Bolts in the foreground. These are longer than the original AC Fuel Pump Bolts because the Carter Casing is thicker. The Bolts will need Thread Tape on them to stop Oil travelling up them and dripping from the them. Note the Brass Plug. Click to Enlargen. Photo by T.
 
Note the Brass Plug has been fitted to the Fuel Pump to block off an unused hole. The Flange Gasket should come with the Pump. Click to Enlargen. Photo by T.
 
Leaking Welch Plug in Goss Fuel Pump. Craigmac. Click to Enlargen. Photo by T.
 

  PumpAndCarburettor.gif

Oil Leak:

When the Diaphragm Spindle Seal wears out in this Pump, Oil will leak from the Drain Hole.

Fuel Filters:

Re: The use of metal fuel filters between the pump and carby.Submitted by triple D on Sat, 07/04/2007 - 02:54.yea they do i have a Z200 in the engine bay of my T P I chev350 bit of heat in there so i put one in just in case. i was told the Z200 ryco will also pick up bits of metal as it is magneticregards triple DEnd of triple D's submission.

Shero's Shed
Grey 132 cu in Holden Six Cylinder Engine in an FC Holden. Note the Carter fuel pump from a Commodore has been fitted. Click to enlargen. Photo by Sherro.

An Inline Fuel Filter fitted to the Tank side of the Pump will save you headaches if any contaminant gets pulled through from the tank. A U-Shaped Loop will trap Water (the heavier of the 2 liquids) in the lowest point and allow the Fuel to float past on top. At the next tuneup, release the liquid in the loop and inspect for any Water.

Changing Out the Pump:

Some tips. 1. Put a smear of Oil on the input pipe so that the Rubber Fuel Hose can slide on easily. Without the Oil the Hose can bind. 2. Use Thread Tape on any difficult Fuel pipe Threads to keep them from leaking. 3. Put Thread Tape on the Fuel Pump Mounting Bolts to prevent Oil from walking up the Threads. Remember that the Mounting Bolt Holes are open and face the Camshaft. When the Camshaft gets spinning it flings hot Oil at the Bolts and the hot Oil tries to walk up the Threads and drip onto the Ground. Commodores were sold with Bolts that had blue Sealant already present on them to prevent the leak. 4. After swapping out the Pump and doing the first startup, try to leave the Engine idling for 5 mins so that the empty Pump, Intake Line and Supply Line can fill up. If you shut the Engine down too soon the carburettor will not have enough fuel to fill up properly and the next start may require Carburettor Priming. If Fuel leaks appear the Engine will have to be shutdown immediately of course.

Fuel Pump Repair Kit:

Goss 199VCBy myeh 14/01/13@21:32 Shed LetsCruise 2560 Is the repair kit for AC, Carter and Goss glass bowl pump. Readily available. End of submission by myeh.

Toricellian Vacuum:

Expect space (not necessarily air) to appear in the fuel filter when it's on the tank side of the pump even if you flood the filter before fitting it. What you're seeing is a vacuum created by the drawing effect of the pump. The height of the filter above the tank has a direct effect on the amount of "space" that appears in the filter. In the old days when glass AC fuel pumps were fitted to Holdens you got a better opportunity to observe the vacuumunder the glass. The Toricellian Vacuum is the vacuum that appears in the top of liquid thermometers and the same effect is what you're seeing in the filter. Consider the Fuel Supply Line to be the Thermometer with the Fuel Tank at the bottom and the Fuel Pump at the top. The vacuum appears at the top near the Fuel Pump. When you shut the engine off, a large vacuum appears as the fuel tries to run back into the tank. Old kerosene heaters used vacuum in the same way. The vacuum inside the glass supply bottle prevented kerosene from flowing out until the neck became uncovered. Once the neck became uncovered kerosene flowed into the heater until the air supply to the bottle was strangled by the same kerosene. The vacuum at the high point of the bottle stopped the kerosene from flowing out. T    

 
Toricellian Vacuum in a Fuel Filter (to the left of the Fuel Pump). Photo by Blissy. Click to Enlargen.
 
AC Fuel Pump from Holden V8. Photo by HZCambridge. Click to Enlargen.
 
AC Fuel Pump Failure in a 202 HZ Holden Engine. Photo by BRC. Click to Enlargen.
 
Broken AC Fuel Pump Actuating Lever found in the Sump of a 202 HZ Holden Engine. Photo by BRC. Click to Enlargen.
 
Oil on the Intake Pipe (on the right of the Pump)  can make fitting the Rubber Intake Pipe easier. Click to Enlargen. Photo by T.
 
Note the Roll of Thread Tape in the Foreground. Click to Enlargen. Photo by T.
 
Note the Thread Tape on the Mounting Bolts. Click to Enlargen. Photo by T.
   

Links:

Toricellian Vacuum

Toricellian Vacuum

Fuel Pump Failure Thread

Terms:

Terms

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