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Motorsport In Tank Pump F-fodyCategory: Fuel SystemDifficulty: 7Approximate Time: 6hrsApplication(s): 82-02 F-bodyAdded By: rjamesLast Updated: 2002-07-25 23:56:48Views 13174

Tools Needed:Good jack,Set of stands,commom socket set,super glue and a sotering iron

Parts Needed:Fuel pump

Purpose:To change out the stock in tank pump. Sorry its all in one paragraph but sent an e-mail on this and just copied it here.

How - To:Step 1Hey Matt, well this is the pump I went with .It is a motorsport 255 ltr pump. Thelargest in tank pump i think is avail. It fits great and will dewfinately give you all thefuel you will ever need . Unless you go like some great big mountain motor orsomething . Will handle around 600 hp I believe. I have used it even with the spray andnever had any probs yet. And best of all they are only 183.00! The fun part is changingthe old one, but I'll try to make it a little simpler. Firts get a set of stands (regular oneswill work)Jack the car up on them around the 6th notch. Putting the frame on them backby the rear. Slowly drop the rear just enough to take the rear down about 6-12inches,leaving the jack under there. Next pull off the panhard bar, then take the controllarm above that off also. Don't worry the rear is still held on by the lower controll armsand won't go anywhere. Next take off the lower shock bolts and pull the shock off thelower stud. Then lower the rearend all the way down (they will swing on the lowercontroll arms). Now I think about it i really don't remember but check the brake line itmight hang up. Once the rear end is hanging as far down as it will go. now hopefullyyou have removed the tires. You must now remove the exausty from the converter andswing it out towards the passenger side so that it is completely out of the way of swingthe rear down. It will be stretched out side ways under your car. In the drivers fender isthe charcoal canister. Remove the panel to expose it and then remove the lines from itthat run to the tank. Then remove the scews that hold the filler tube to the fender also.If there is fuel in the tank you might want to siphon it out some way before proceeding.

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The lines that run to the tank on the frame rail can now be disconnected. (right by thefilter) Now you can remove the 2 strap bolts that hold the tank in place. If the tank isempty then there virtually is no weight to speak of. I did this whole damn job by myself! Now is the tricky part. The gas tank is exact oppisite from what the repair manualswill tell you. The tank will have to be pulled downtipping to the right and when it isdown far enough then pulle toward the pass side of the car. Enough that the tank will beslightly out side the car and the POS filler neck will still be STUCK in the fender. Thereason for this is the fender has 2 lips on it the only one you can see is the outside onbut there is one on the inside that it will catch on. And this is the POS part. The fueltank will NOT come oput the back of the car like you would think , it has to be pushedtoward the front of the car enough to clear tha filler tube. (I don't know whay Gm justdidnot make it a 2 piece neck but oh well). Once you get it just to where you think "mygod why won't this thing fall. Climb out from under the car and on the drivers sidestick you head into the fender and you will see why. Take a screwdriver and use it topry down on the top od the filler neck just to cler the lip on the neck (obout an 1/8thince or so and WALA the tank should hit the ground. From here it is self expanitory toreinstall. But remember to put the DAMN exaust back on befor you relift the rear endup, You'll be cussing more than you have been allready. Now to the pump . Pull theretainer screwws at the top of the pump out and lift th whole assembly out as one. Nowyou will notice the stock pump is in its own case. Yellowish color. Take and removethe lines and retainer off to remove the yellowish container. The corregated hose willstay the same shape after removed. Once you have the container off then around the topthere is a sealed seam. Use a rozor knife to cut carefull oroud to cut through the glue toremove th lid. Once thru the pump is inside there. Now you will notice the pumpisoffset from the factory and the new one is not. You will have to grind away the edgein side the housing so that you can scoot the new pump over to line it up. Once you getit lined up and ready to install the lid. (injenuity time) Get it all ready to reinstall andtrial fi the lid before finalizing . Get a tube of super glue and use it to hold the lidtogether. Once it is set the take a sotering iron and heat it up and then melt the 2 piecestogether by makingvertical lines about 1/2 inch apart melting the 2 halves together.(should end up with about 4-6 lines) Now remember it does not have to keep out fuel itis only there to hold the pump in place. Now is a good time to look at everything tomake sure you dont lose this pump down in the tank while driving. I thing i used someZip Ties to reinsure myself. You can also see how these pumps are cooled you have 1line out to the motor and 1 back to the pump. What this does is sent un spent fuel fromthe engine back to the container wich returnes fuel to the outside of the oump to keep itcool. Pay close attn to wich wires went where cause you can hook this pump up wrongand it will still sound like it is pumping but it actually is pumping the wrong way. Justremember take your time and everything will work out for ya. Also you might want tocheck into this but a few people have put a T-REX inline pump on their cars wich thestock went bad and it seemd to work fine and still pull enough fuel thrugh the stockpump. Just a thought! Any more ?'s just ask most people I dont reply to cause of all thetyping but in this case I made an exception, glad to help. I amy just put this on tech tips so I don't have to do it again! lol lol Rob

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http://www.fbody.com/tech/details.cgi?id=41[2011-05-30 13:29:28]

more information for poorly edxplained steps or notes on parts/tools/steps etc.

Posted By: ws689 Last Updated:2003-05-05 15:57:32

try this, lower the rear axle by just removing the shock bolts thenlower the tank then remove the carpet in the truck and cut a squarehole in the middle about 2 x 2, and wa la you have an access panel,done!

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