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Fuel pump push rod question


Napes

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My research has not produced an answer, so I'm trying to find out which fuel pump push rod my engine has. It's a rebuilt engine from Eric Kerman with a 264 cam and a '74 block.

The length of the push rod is 88.23 mm. Is this P/N 13 31 1 255 727 or

P/N 13 31 1 250 398?

And, does anyone have info on which fuel pump goes with this pushrod. I find both of these P/Ns: 13 31 1 252 506 and 13 31 1 265 192. What is the difference between these two pumps?

I'm inclined to believe that 265 192 is correct.

Also, does anyone have the P/N for the plastic mushroom-shaped inserts that go over the fuel pump mounting studs to locate the fuel pump correctly?

Thanks,

Bob Napier

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The 506 is the long neck style one. Not sure of the rod measurement though.

I'm no longer affiliated with Maximillian Importing Company in any way, please address any questions directly to them.  -Thanks.

2002 "tii" coupe 1970
E21 320/6 2.7 Stroker 1981
E23 730 1978

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Guest Anonymous

Your rod is for a newer pump 13311265192. The longer rod is 10.5mm for older pumps. The mushroom insulators can be found on realoem 13310075752

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I saved this from Tom Jones as I had a similar issue. It all depends on which pump you have:

There are two different fuel pump push rods for 2002's. Early longer ones are for the "506" early pump and the "677" M30 types. This is the push rod for all the BMW mechanical fuel pumps that have the lever type operating mechanism that is below the mounting flange.

#13 31 1 250 398 is 107mm long. It has a narrow section in the middle of it. This is the push rod for all the BMW mechanical fuel pumps that have the lever type operating mechanism that is below the mounting flange. These longer ones are for the "506" early pump and the "677" M30 types.

#13 31 1 255 727 is 88mm long. This shorter pump rod is for the "192" and all the pumps which have the pin and spring mechanisms that stick out of the pump mounting flange.

#11 11 1 721 614 is the insulator block.

#13 31 0 075 752 is for the insulator bushings, they use two (2).

HBChris

`73 3.0CS Chamonix, `69 2000 NK Atlantik

`70 2800 Polaris, `79 528i Chamonix

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  • 1 month later...

Okay - so now I've got some more questions. ;)

I've got a 13 31 1 252 506 - do i need the 13 31 1 250 398 pushrod for sure? Also, can I use the 506 pump on a later model ('74) ?

Bob - sorry to bug you on this, but seems like you just went through this.. I ordered a new pump from Blunt, and got the 506 - not sure if that's the right one... it definitely doesn't fit with the pushrod I have, but I think the right pushrod would make it right. BUT.. in another post, I saw, you posted that you needed a different push rod...

http://www.bmw2002faq.com/component/option,com_forum/Itemid,50/page,viewtopic/p,856046/#856046

So.. now I'm confused....

Matt

I needed a car, and a hobby....

Nor'East '02ers-

www.bmw2002.us

Betty VIN 4229155

The original colour was Malaga, paint code 021

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