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replacing fuel pump


auggiemize

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Not quite a mechanic, yet...any trick on swapping a new fuel pump for an old one (carbed engine)? Do I need to prep the new gasket with anything?...obviously make sure all old surfaces are clean, hoses are new, and filter...and a catch can under to keep peace with my wife...Thanks,

Dave V.

Edited by auggiemize
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Its pretty simple! Two nuts, two washers, and the insulator. Shouldn't take more than a couple minutes. Be sure to replace the two plastic bushings if yours are jacked up. Part # 13310075752 

 

You can see the plastic bushings just behind the nuts/washer on this. 

post-15313-13667606038644.jpg

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And be sure to order the proper pump.  Some are tall. others short, causing a fitment/hose interference problem.  Paul W./Maximillian Importing or Steve/BluntTech should be able to steer you right!

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John in VA

'74 tii "Juanita"  '85 535i "Goldie"  '86 535i "M-POSSTR"  

'03 530i "Titan"  '06 330ci "ZHPY"

bmw_spin.gif

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Thanks for the quick replies folks, and especially the pic 99. I'm sorry I'm been AWOL  for a while, but haven't we all. I've missed being in tune. Pun intended...Hey John, ever get rid of those old yokohamas? Is my recall working...Cant afford Prevegen. Again, appreciate the input.

Dave V. in NC

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5 hours ago, Hans said:

Where's Mike??

 

5 hours ago, Hans said:

there are two different push rod lengths.

The longer pushrod goes with the early style pump that's held together with screws and is rebuildable.  It has a lever that the rod pushes back and forth to operate the pump.  The shorter pushrod goes with the later style pump that's all crimped together so it's a throwaway when it dies. This pump has a spring-loaded plunger that's pressed by the pushrod to operate the pump.  

 

Especially with the early style pump, check the pushrod to make sure it's not beveled on the pump end.  It isn't supposed to be, and enough  beveling will keep the pump from operating properly.

 

Cheers

mike 

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'69 Nevada sunroof-Wolfgang-bought new
'73 Sahara sunroof-Ludwig-since '78
'91 Brillantrot 318is sunroof-Georg Friederich 
Fiat Topolini (Benito & Luigi), Renault 4CVs (Anatole, Lucky Pierre, Brigette) & Kermit, the Bugeye Sprite

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  • 1 year later...

Good Morning Everybody,

First and foremost, thanks to Auggiemize for starting this thread and most importantly, thanks to all of the commenters. You really are what makes this site great.

I am in the process of getting my car running after almost 4 years of sitting in the garage.

I am finding that the "mechanic" that rebuilt the engine sometime ago, took a lot of short cuts.(stop me if you have heard that before! :))

I ordered a new fuel pump from Blunt and am in the process of installing it, but had some questions.

The old pump had springy metal washers instead of the plastic washers that s99 mentioned. Is that an issue, do i need plastic?

The old pump had grease on the spring, do i need to do that?

This is just curiosity. Why did the old pump have plastic sleeves in the mounting holes? Was it so that pump could be used on other model BMWs? i plan on looking up the part number on the old pump and maybe that will shed some light on whether it was the correct part for my car.

Thanks again for any help you might lend.

I have to go to my real job, which gets in the way of working on my car.. :)

Philip

Springy washers, not plastic.jpg

Old pump w grease.jpg

Old Pump wPlastic Sleeves.jpg

old spacer.jpg

old pump part number.jpg

Life is short, enjoy the ride!
L'Ultimo Ciclista, 200Km race, Nove Colli 2012

1976 Mint Grun

Philip

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On 6/12/2020 at 2:28 PM, s99 said:

You can see the plastic bushings just behind the nuts/washer on this. 

post-15313-13667606038644.jpg

 

23 minutes ago, bublinki said:

Why did the old pump have plastic sleeves in the mounting holes?

Probably to prevent oil leaks and dampen vibrations.

 

The plastic sleeves press into the pump, followed by a thin wave washer, and nut.

Buckeye's suggestion to use  Nyloc nuts is good. Don't overtighten....only 7-10 lb./ft.

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Hey John and Son of Marty,

Thanks so much for the replies and answers.

Now I get it. My bushings(I mistakenly called sleeves?) are so worn that the Left one is completely flattened out.

I wish I would have understood sooner, because I would have ordered them along with the pump. Oh well, the car sat for

 a long time, what's a few more days. :) 

Have a great weekend everyone.

Philip

Life is short, enjoy the ride!
L'Ultimo Ciclista, 200Km race, Nove Colli 2012

1976 Mint Grun

Philip

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