BMW 2002 FAQ

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[quote="tjones02"]I will [i]eventually[/i] post pictures of all these parts......

There are basically two different types of mechanical fuel pumps that were used on '02s. And one that can be used as a performance upgrade......

#13 31 1 265 192 Has 8mm inlet with 6mm outlet hose fittings. The operating mechanism has a pin and spring that stick out of the housing.

#13 31 1 252 506 pump is defined by its lever type operating mechanism
that is below the mounting surface and the 8mm inlet and 6mm outlet hose fittings.

#13 31 1 260 677 was used on the carburated 6 cylinder M30 motors and is defined by the lever type operating mechanism, its ability to clear most side draft intake manifolds, AND its 8mm inlet AND outlet hose fittings, thus it has a greater volume capacity while having the perfect pressure for running many different types of carburetors on the M10 4cyl engines.

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 pushrod for all the BMW mechanical fuel pumps that have the lever type operating mechanism that is below the mounting flange.

The two part #'s for the rods are...

#13 31 1 250 398 107mm long. It has a narrow section in the middle of it. This is the pushrod 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 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).

They use two wave lock (not split lock!) washers and two 8x1.25 x 12mm wrench size nuts (13mm nuts don't work as nice in the tight space around the pump). Some try and use nyloc nuts but I find most of the time that the studs are not long enough to grab properly into the nylon. Try and not over torque the nuts as the bushings are fragile.[/quote]

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