Fuel Pump Removal

[rubio9800]

Hello folks,

Looking for advice on how to go about removing the pump from an 81/265 GP.

Long story short: fuel line to carb had a hole, factory one was on so tight pump bent a bit and created a small hole when removing the line.

Now pump is squirting, i've tried with a wrench to loosen up the screws it's a tight spot.

Any tips/tricks?

Was hard to get a good video:

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Watch this video on Streamable.

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thanks

 

[CopperNick]

Gear Wrench makes ratcheting combination wrenches, sold by the each, that might be able to sit down on those bolts and back them off. Otherwise it could be a case of using a normal wrench just to take the tightness off and then going in with a 1/4 drive ratchet, extension, and deep socket to finish the job off.

Before any disassembly commences I would be wondering how the pump is actuated, push rod driven off the cam, or some kind of eccentric that is bolted to the front of the cam ahead of the timing gear or ? Reason for the question is that if it is a pushrod then you will have to temporarily pin it into position or once the pump comes out the push rod will slide down to the bottom of its passageway and be miserable to push back when you try and slide it back up out of the way while you are attempting to stuff that new pump into position and keep the gasket from sliding away and fishing the bolts into their threads; three hands aren't nearly enough.

First gen SBC's with the mechanical pump have a bolt that screws into the block along the path of the pump rod passage. For them you just remove that screw and sub in a slightly longer one that will contact the rod before running out of thread. This is an insert to first touch and quit exercise as any torque on the bolt can scar the rod and cause it to bind. For a pump driven by cam mounted eccentric it is simpler to a degree as there is no pushrod to deal with, just whatever the pump is hiding behind by way of other components.

Don't try to save the rubber hose on the return side of the pump. Easier to cut it and then use bulk line and cut a completely new section of hose that is long enough or even slightly longer than enough to make any bends it needs to make it a little simpler to route into place. Also pitch the present gear clamps and go new. They die easy if over tightened and will rust over time.

You will likely find yourself doing half the work from upstairs and then having to slither under the car to get at the rest. A proper floor jack and jack stands for that second portion of the exercise are highly recommended. I DO NOT suggest or recommend the use of cinder blocks or multiple layers of 2 x 8's laid flat and wedged under the frame as a way to either lift the car secure it from falling; see YouTube for the basic graphics as to why not.



Nick

 

[rubio9800]

thanks Nick for the detailed response.

i have no clue what kind of pump it is, first time im going to attempt to do this!!

i definitely only use jack stands (3 tons each)

i'm going to attempt to take it out this weekend while i wait for the replacement to arrive.

 

[CopperNick]

First time?!?! Then there is one more item you need to acquire and that is either a Chilton's or Haynes repair manual for your make/model/year of car. Both are fairly comprehensive in terms of subject material and either could save you some time and misery with respect to what you are about to do. They can also solve the question of what drives that pump and what you may or may not need to do in that regard.



Nick

 

[rubio9800]

i do have the service manual , really basic when it comes to information on the fuel pump

 

[rubio9800]

looking through the engine section i do see a mention of "essentric" would that mean there's no push rod?

 

[ELCAM]

When you take the tubing fitting off you have to hold the square where it screws in with a wrench (some aftermarket pumps have a hex shape here so it is easier to do) as you put pressure on the wrench on the tube fitting you need to put the same pressure on the wrench holding the square part in the opposite direction.

Say your using a crescent wrench to hold the square part pointing straight down at 6 o clock. put the flare nut wrench so the handle is at 8 o clock so you can grab both wrenches in one hand, one pressing on the heel of your hand one in the fingers, compress the wrenches together. Once it is broken loose you don't need two wrenches.

You just need a socket and short extension to remove the two bolts holding the fuel pump on. Hard to see but not to hard to feel what you are doing once you get the correct size socket.

If it seems hard to install (hard to get the bolts started) the cam eccentric that drives the fuel pump might be high (pushing the pump lever) turn the motor a half turn to put the cam eccentric on the low side.

 

[rubio9800]

When you take the tubing fitting off you have to hold the square where it screws in with a wrench (some aftermarket pumps have a hex shape here so it is easier to do) as you put pressure on the wrench on the tube fitting you need to put the same pressure on the wrench holding the square part in the opposite direction.

Say your using a crescent wrench to hold the square part pointing straight down at 6 o clock. put the flare nut wrench so the handle is at 8 o clock so you can grab both wrenches in one hand, one pressing on the heel of your hand one in the fingers, compress the wrenches together. Once it is broken loose you don't need two wrenches.

You just need a socket and short extension to remove the two bolts holding the fuel pump on. Hard to see but not to hard to feel what you are doing once you get the correct size socket.

If it seems hard to install (hard to get the bolts started) the cam eccentric that drives the fuel pump might be high (pushing the pump lever) turn the motor a half turn to put the cam eccentric on the low side.

right on! thanks for the tip
going to give it a try later today

 

[rubio9800]

i managed to get the pump out. Inside the block i feel like a lever(guessing what it is) that goes up and down, should it be in UP position when putting in new pump?

i have a 3 line pump

 

[ELCAM]

That sounds correct.