How To Remove - Install Fuel Pump?
Thread Starter
Safety Car
Joined: Jul 2004
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How To Remove - Install Fuel Pump?
greetings all. i have a very long thread going at this time http://forums.corvetteforum.com/show...post1556223699 so, i figured that i would ask a related question in a new thread that is directly related to my other.
i have a fuel pump assembly that i need to remove the PUMP ONLY from the assembly. looking at this, i cannot figure out how to do this w/out breaking something that i may need.
i am sure someone has done this before. any help in detail would be appreciated..pictures welcome!....the helms manual does not cover this, only the entire assembly removal (of what i can find). thanks!
i have a fuel pump assembly that i need to remove the PUMP ONLY from the assembly. looking at this, i cannot figure out how to do this w/out breaking something that i may need.
i am sure someone has done this before. any help in detail would be appreciated..pictures welcome!....the helms manual does not cover this, only the entire assembly removal (of what i can find). thanks!
Le Mans Master
Joined: Feb 2006
Posts: 8,753
Likes: 9
From: Louisiana
You remove the gas lid and cap. Remove the rubber filler and you will see three lines. The big one is the feed line, the one below it is the return line, and the one on the left is the EECS vapor line... if memory serves me correct. You will have to remove the three rubber to metal hoses and disconnect the FP connector. There are 9 bolts that hold the assembly down. They have 0-rings on each and if any are worn/broken..replace. Be careful when pulling the assembly up, there is a rubber gasket between it and the tank and it will tear is not gentle (you can get a new on at Mid america or such). Once the assembly is out, the fuel pump itself is just slide/held into place and is connected to the wires that run to the connector discussed earlier. There is a sock wrapped around the pump and a strainer at the bottom and both become brittle over time and I would replace both (look at the other thread). The pulsator is located above the FP and it slides into it. The rest is common sense and you can test it by using a jumper wire from the battery to the voltage side of the pump and grounding the other side.
Sound like I've done it...eh.
Sound like I've done it...eh.
Thread Starter
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Originally Posted by RRT vette
You remove the gas lid and cap. Remove the rubber filler and you will see three lines. The big one is the feed line, the one below it is the return line, and the one on the left is the EECS vapor line... if memory serves me correct. You will have to remove the three rubber to metal hoses and disconnect the FP connector. There are 9 bolts that hold the assembly down. They have 0-rings on each and if any are worn/broken..replace. Be careful when pulling the assembly up, there is a rubber gasket between it and the tank and it will tear is not gentle (you can get a new on at Mid america or such). Once the assembly is out, the fuel pump itself is just slide/held into place and is connected to the wires that run to the connector discussed earlier. There is a sock wrapped around the pump and a strainer at the bottom and both become brittle over time and I would replace both (look at the other thread). The pulsator is located above the FP and it slides into it. The rest is common sense and you can test it by using a jumper wire from the battery to the voltage side of the pump and grounding the other side.
Sound like I've done it...eh.
Sound like I've done it...eh.
...pulsator?...huh?....i looked at the pump ASSEMBLY and it appears that the PUMP is a "presssure fit" to whatever it slides into (?). ya sure i am not going to break this pulling it apart?...it seems that it is in there pretty damn tight!
Last edited by Da Mail Man; Jul 24, 2006 at 08:16 PM.
Thread Starter
Safety Car
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Originally Posted by RRT vette
I don't really remember having a problem taking the fuel pump off the assembly. Seemed like it just slid out the bottom. Sounds like yours is welded on.
Le Mans Master
Joined: Feb 2006
Posts: 8,753
Likes: 9
From: Louisiana
That doesn't look anything like mine did...I mean the way it's mounted on there. It almost looks like someone welded it on. Mine just had a clamp in the shape of a C that went around the pump and it just slid from the bottom. 
Thread Starter
Safety Car
Joined: Jul 2004
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Originally Posted by RRT vette
That doesn't look anything like mine did...I mean the way it's mounted on there. It almost looks like someone welded it on. Mine just had a clamp in the shape of a C that went around the pump and it just slid from the bottom.
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Melting Slicks
Joined: May 2004
Posts: 2,524
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From: Lufkin Texas
St. Jude Donor '05-'06
If you twist/pull the sock off you can then lift the bottom out of that weird rubber grommet that nestles inbetween the bottom of pump and bracket. The new pump should have a new grommet so if you have to tear the old one it's no big deal. Make sure the new one has a new grommet before you tear it though. After you have it free at the bottom you just angle it out and slide it out of the pick up tube at top next to where the wire harness plugs in.
Here's a pic of my old one out you can see where I had to split the grommet at one point to remove it.
Here's the top that will slide out of the pick up tube once the bottom is free.
Here's my new one and sock installed and the old one out. You can see the new one has a thicker different grommet but it works the same.
I wish I would've taken more pics but I didn't. You can see how I put the old rubber sleeve on the new pump. When putting the new one on, put the grommet on then push it into the pick up tube and then put the bottom with grommet into the bracket and then put the new sock on which holds it onto the bracket.
Hope this helps
Here's a pic of my old one out you can see where I had to split the grommet at one point to remove it.
Here's the top that will slide out of the pick up tube once the bottom is free.
Here's my new one and sock installed and the old one out. You can see the new one has a thicker different grommet but it works the same.
I wish I would've taken more pics but I didn't. You can see how I put the old rubber sleeve on the new pump. When putting the new one on, put the grommet on then push it into the pick up tube and then put the bottom with grommet into the bracket and then put the new sock on which holds it onto the bracket.
Hope this helps
Last edited by skateparkdave; Jul 24, 2006 at 09:40 PM.
Thread Starter
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Originally Posted by skateparkdave
If you twist/pull the sock off you can then lift the bottom out of that weird rubber grommet that nestles inbetween the bottom of pump and bracket. The new pump should have a new grommet so if you have to tear the old one it's no big deal. Make sure the new one has a new grommet before you tear it though. After you have it free at the bottom you just angle it out and slide it out of the pick up tube at top next to where the wire harness plugs in.
Here's a pic of my old one out you can see where I had to split the grommet at one point to remove it.
Here's the top that will slide out of the pick up tube once the bottom is free.
Here's my new one and sock installed and the old one out. You can see the new one has a thicker different grommet but it works the same.
I wish I would've taken more pics but I didn't. You can see how I put the old rubber sleeve on the new pump. When putting the new one on, put the grommet on then push it into the pick up tube and then put the bottom with grommet into the bracket and then put the new sock on which holds it onto the bracket.
Hope this helps
Here's a pic of my old one out you can see where I had to split the grommet at one point to remove it.
Here's the top that will slide out of the pick up tube once the bottom is free.
Here's my new one and sock installed and the old one out. You can see the new one has a thicker different grommet but it works the same.
I wish I would've taken more pics but I didn't. You can see how I put the old rubber sleeve on the new pump. When putting the new one on, put the grommet on then push it into the pick up tube and then put the bottom with grommet into the bracket and then put the new sock on which holds it onto the bracket.
Hope this helps
based on what i see, i have to pull/push the pump up towards the filler neck but, that doesn't make a lot of sense because that is where the lines go into the pump...
i cannot pull the pump away from the filler neck (just a point of reference of direction) because of that steel base as part of the assembly....
if i try to remove the SLEEVE around the pump, where the heck is it to go as it can't come off unless you cut it off which i don't want to do.
ya can't slide it up or down because of "obstructions"........
if i grab the pump and pull from/towards the side (90*), i will damage the top of the pump or bend/break the lines that go into it.........just my observations......
Le Mans Master
Joined: Oct 2003
Posts: 6,130
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From: seattle WA
very nice post. A couple of things I would be concerned with when only replacing the pump motor are the check valve and the pulsator, only because BOTH can cause a loss in fuel pressure. For the life of me I don't know why I cannot find an exploded view of the fuel pump!
It would seem to me that if the FP motor was the only concern when there was a problem with a fuel pump GM would have posted something about the sequence of just replacing the motor.Sorry, I know this is no help to you.
Last edited by rick lambert; Jul 24, 2006 at 10:09 PM.
Melting Slicks
Joined: May 2004
Posts: 2,524
Likes: 10
From: Lufkin Texas
St. Jude Donor '05-'06
Originally Posted by Da Mail Man
i cannot pull the pump away from the filler neck (just a point of reference of direction) because of that steel base as part of the assembly....
Thread Starter
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Originally Posted by skateparkdave
No, no, re-read my post. First remove the sock, then the only thing holding the bottom to the bracket is that rubber grommet. Once you remove the sock, the pump will slide a tad towards the filler neck to let you get the bottom free from the grommet and bracket. Once the bottom is free you slide it off the filler tube. Then remove the old sleeve and use it on the new pump.
Melting Slicks
Joined: May 2004
Posts: 2,524
Likes: 10
From: Lufkin Texas
St. Jude Donor '05-'06
Originally Posted by rick lambert
very nice post. A couple of things I would be concerned with when only replacing the pump motor are the check valve and the pulsator, only because BOTH can cause a loss in fuel pressure. For the life of me I don't know why I cannot find an exploded view of the fuel pump! It would seem to me that if the FP motor was the only concern when there was a problem with a fuel pump GM would have posted something about the sequence of just replacing the motor.Sorry, I know this is no help to you.I imagine like alot of things, GM just sets it up so you have to spend more $ when your service writer at the dealership tells you it only comes as one solid unit.
Thread Starter
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....well dammit!....get that man a beer, a bag of drugs and a hooker!.......
it worked just as you said it would........freakin' yippee!...it is however a very tight fit!.......
ok, now i can sleep tonight....i may keep the hooker just 1 more night!
. tomorrow, i'll verify if there is any voltage at the tank filler neck and proceed from there.
it worked just as you said it would........freakin' yippee!...it is however a very tight fit!.......
ok, now i can sleep tonight....i may keep the hooker just 1 more night!
. tomorrow, i'll verify if there is any voltage at the tank filler neck and proceed from there.
Le Mans Master
Joined: Feb 2005
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From: The Motor City
Originally Posted by skateparkdave
Thanks Mick, I just hope it makes sence and helps him out.
I didn't see anyone comment about direction of the sock
Thread Starter
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Originally Posted by mseven
It makes perfect sense to me, but I know it will make more sense as he actually goes through the process.
I didn't see anyone comment about direction of the sock
I didn't see anyone comment about direction of the sock
the sock/strainer that "filters" sediment in the gas only comes off one way.......i thought he was saying that i had to peel or remove the "SLEEVE" from the pump....