Overpressure-vacuum safety valve
In case of shutdown of the gasoline vapor recirculation circuit, this valve avoids the creation of excess pressure in the tank (tank swelling) or rarefaction (due to fuel consumption, the tank is crushed).
Restrictor valve
This valve prevents the tip of the leaded gasoline or diesel fuel nozzle from being inserted into the filler neck.
Overfill prevention valve and rollover prevention valve
The operating element of the overflow prevention valve is a ball.
When the car is stationary during refueling, the ball rests on the saddle, thereby blocking a certain amount of air in the tank.
When the car moves, the ball moves away from the saddle, opening a message between the tank and the adsorber.
There must be a certain amount of air in the fuel-filled tank. This allows the fuel to expand without causing the tank to bulge.
The rollover prevention valve prevents the tank from emptying through the channel leading to the adsorber.
Fuel tank:
1 - fuel tank;
2 - mounting holes;
3 - filler neck;
4 — a fastening collar of a bulk mouth;
5 - brackets for fastening brake pipelines;
6 - fuel supply pipeline;
7 - pipeline for supplying gasoline vapors;
8 - pipeline for removing gasoline vapors to the adsorber (coming from the fuel tank);
9 - communication with the atmosphere;
10 - adsorber;
11 - valve to prevent overfilling of the tank and valve to prevent fuel leakage when the vehicle rolls over;
12 - anti-pressure tube (degassing during filling);
13 - fuel pump with level sensor assembly.
Fuel system diagram:
1 - branch pipe for the pipeline going to the adsorber;
2 - ball valve to prevent overflow;
3 - anti-pressure tube when filling;
4 - restrictive valve;
5 - safety valve overpressure-vacuum;
6 - hole for air release during refueling;
7 - cavity for fuel expansion;
8 - filling hole;
9 - useful volume of fuel;
10 - valve to prevent overfilling of the tank and valve to prevent fuel leakage when the car rolls over.
Filler neck
The filler neck for unleaded petrol has:
- smaller filler hole than a conventional filling nozzle (restrictive valve). The use of leaded gasoline leads to damage to the exhaust gas toxicity reduction system - an oxygen sensor and a catalytic catalyst;
- a valve that closes the filling hole to prevent gasoline from escaping;
- sealed stopper.
Removing the fuel tank (all engines)
Place the car on a lift.
Disconnect the battery. Drain the fuel from the fuel tank. Remove the main muffler and intermediate pipe.
Remove:
- central heat shield holders (1);
- central heat shield.
Remove:
- rear heat shield bolts (2);
- rear heat shield.
Remove clamp (3) branch pipe connecting the filling pipe with the fuel tank from the side of the fuel tank.
Disconnect the injection tube fitting (4).
Disconnect hard brake lines (5) and move them aside.
Disconnect the fuel lines (6) away from the fuel tank and move them aside.
Disconnect the canister outlet pipe fitting (7) and take them aside.
Disconnect the filler neck from the fuel tank side. Install a hydraulic jack under the fuel tank.
Turn away bolts (8) fuel tank mountings.
Lower the fuel tank slightly.
Disconnect:
- fuel level sensor module connector;
- handset (And) fuel level sensor module.
Remove mounting bolts (8) and fuel tank.
If replacing the fuel tank, remove the fuel level sensor.
Replace the fuel line clamp between the filler neck and the fuel tank.
After installing the tank, torque the fuel tank mounting bolts to 21 Nm.
Connect the filler pipe to the fuel tank.
Install all removed parts in reverse order.