Garagistic M6X Swap Guide- Fuel

There are many fuel alternatives that one can take for BMW when swapping an M60 Engine. The good news is that swapping for an upgraded fuel pump is unnecessary. For the minimum required and extra mile style of modification, I’ll help guide you toward the best method for each. TOOLS REQUIRED

- Flat Head Screwdriver TIME & MONEY

- .2 Hour and $0 INSTRUCTIONS

Please see the pictogram in Figure 49 for the overall fuel system on the M60.  The picture also helps to explain where the fuel supply/return is located on the M60. 

You can use the stock E30 fuel pump (unless it needs replacing). I also think it’s a good time to replace the fuel filter as well.

As shown above in Figure 50, you can see where on the E30 the fuel send and return lines reside on the driver side frame rail where it comes up to the engine bay. 

Going the extra mile! TOOLS REQUIRED

 Socket Wrench Misc.

8mm Socker

2 Flat Head Screwdrivers
10mm Socket Soldering Iron
Wire Snips
Zip Tie
Dremel or hack saw TIME & MONEY

- 2 hours & $120 INSTRUCTIONS

Here, you can add a few options. This includes a replacement of the fuel filter and adds a larger Walbro 255 Fuel Pump.

The Walbro 255 Fuel Pump is a great enhancement for anybody looking to get more fuel reliably in all conditions. While the existing E30 fuel pump is adequate, it is old and likely tired. Therefore, I recommend putting in a Walbro 255 Fuel pump. Below in Figure 51 shows how it is adapted for the E30. At that stage, it is a basic install plug and play. However, you can easily manipulate your out-ofthe-box Walbro 255 to the E30fuel lines.

To install this, you must do the following, in order: 

1. Remove the Existing E30 Fuel Pump & Fuel Level Sender. 

2. Use the supplied hose & clamps to install the Walbro 255 on the E30 fuel pump holder. 

3. Wire the positive to the Positive and the negative to Ground. 

a. This may or may not include soldering, depending on the quality of your existing fuel pump housing.  Take note that this Walbro Fuel Pump will use more than your existing E30 fuse is prepared to handle. You are very unlikely go to over 90psi, so it is recommended to change the fuse rating on your E30 Fuel Pump Line from 7.5A to 15A as shown in . The existing power & return wiring is setup to handle 15A as the wiring gauge is 16 Gauge.

The Fuel Filter is a simple in/out filter used to remove any debris or rust from the fuel lines before it goes into the sensitive pintles of your fuel injectors. The fuel Pump looks like that of Figure 52.  

It’s a simple replacement involving a small flat head screwdriver & 8/10mm socket. On the E30, it is located IN FRONT OF the driver side rear wheel. 

1. Remove the cowling that covers the fuel pump. This involves 8mm & 10mm socket

2. Remove the clamps holding the rubber fuel lines to the fuel pump. Use a flat head screwdriver. 

3. Installation is the reverse or removal.