Workshop Manuals Factory service & repair Alfa Romeo
Alfa Romeo 145/146 Engines, 146 Bodywork and Engine Overhaul Manual (1994-2001)02 · 1.9 JTD engine (1910)
02 · Engine

Multi-function valve

Make
Alfa Romeo
Model
145/146 Engines, 146 Bodywork and Engine Overhaul Manual
Year
1994–2001
Section
Fuel supply system › Multi-function valve
1.9 JTD engine (1910)Multi-function valve
  1. Slacken the fastening screws e remove the lid for access to the submerged pump assembly complete with level gauge control.
Submerged pump assembly with level gauge control
  1. Disconnect the electrical connection from the submerged pump assembly complete with level gauge control.
  2. Disconnect the quick couplings of the fuel delivery and return pipes from the submerged pump assembly complete with level gauge control.
  3. Slacken the nut and disconnect the breather pipe between the lower and upper part of the tank.
Electrical connection and quick couplings
  1. Using tool no. 1.822.135.000, remove the locking ring, then withdraw the submerged pump assembly complete with level gauge control from the fuel tank.
Tool removing submerged pump assembly

MULTI-FUNCTION VALVE

The functions of this valve are the following:

  • pressurising the fuel tank
  • retaining
  • tightness in the event of overturning.
Multi-function valve cross-section

FUEL TANK PRESSURISING

The fuel tank is kept under pressure between 55 ÷ 75 mbar using a fluoro-silicone rubber valve resting on a sealing edge.

The valve is supported with a stainless steel plate countered by a spring.

When the pressure in the tank exceeds the specified limit, it overcomes the resistance of the spring and allows the valve to rise, thereby allowing the vapours through to the atmosphere.

Parts & tools for this job For 1994 Alfa Romeo 145/146

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