Fuel pump - removal and refitting

Fuel system / Fuel pump - removal and refitting

1 On 903 cc engines, the fuel pump is mounted on the side of the timing chain cover and is driven by a pushrod from an eccentric on the front of the camshaft.

2 On the 1116 cc and 1301 cc engines, the fuel pump is mounted on the side of the crankcase and is driven by a pushrod from an eccentric on the auxiliary shaft.

3 The removal of both types of pump is carried out in a similar way.

4 Disconnect the fuel inlet hose from the pump and plug the hose (photo).

3.4 Fuel pump

5 Disconnect the fuel outlet hose from the pump.

6 Unscrew the pump fixing bolt and remove it together with spacer, pushrod and gaskets (photos).

3.6A Fuel pump on mounting studs

3.6B Fuel pump spacer and pushrod

7 Refitting is a reversal of removal. Make sure that a new gasket is located on each side of the spacer.

8 The gasket on the inboard side of the spacer should always be 0.3 mm thick, but gaskets for the outboard side are available in thicknesses 0.3, 0.7 and 1.2 mm, as a means of adjusting the fuel pump pressure. The standard fuel pressure is 0.176 bar (2.55 lbf/in2). If the pressure is too high a thicker gasket should be used, if too low, fit a thinner one.