Peugeot 406

since 1996 release

Repair and operation of the car

Peugeot 406
+ 1. Maintenance instruction
- 2. Maintenance
   - 2.1. Petrol models
      2.1.1. Technical data
      2.1.2. Frequency of service
      - 2.1.3. Maintenance
         - Each 15000 km or 12 months
   Replacement of oil and oil filter
   Check of level of oil in the automatic transmission
   Check of tightness of hoses and effluence of liquids
   Replacement of the filter thin air sedums in system of ventilation
   Coupling work check
   Check of a protective cover of a power shaft
   Steering and suspension bracket
   Check of the shock-absorber
         + Each 30 000 km
         + Each 60000 km
         + Each 120000 km or alternate years
   + 2.2. Diesel models
+ 3. Engine
+ 4. Cooling systems, heating and ventilation
+ 5. Fuel system
+ 6. System of ignition
+ 7. Coupling
+ 8. Transmissions
+ 9. Power shafts
+ 10. Brake system
+ 11. Suspension bracket and steering
+ 12. Body
+ 13. Electric equipment
+ 14. Main malfunctions Check of tightness of hoses and effluence of liquids

Cooling liquid
1. Leak in the cooling system usually is found on white or colors of a rust to a raid in the area adjoining leak.
2. Carefully check a radiator and hoses of cooling liquid on all length. Replace hoses with cracks, gaps and signs of aging. It is easier to find cracks if to press a hose. Pay special attention to collars which attach hoses to cooling system elements. Collars of fastening of a hose which were strongly tightened can cause a gap or a puncture of a hose, leaks in the cooling system will be result of what.
3. Examine all components of the cooling system (hoses, the surfaces of sockets, etc.) regarding leaks. If any problems of similar character with system components are found, then replace this component or laying.


Precisely it is difficult to define fuel leak until leak becomes essential and, therefore, easily visible. Fuel tends to evaporate quickly as soon as it contacts with air, especially in a hot motor compartment. Small drops can disappear before you are able to define the place of leak. If you suspect that there is a leak of fuel in the field of a motor compartment, then cool the engine and start it, it cold, at an open cowl so far. Metal elements tend to contract in a cold state, rubber hoses tend to be weakened so any leaks will be more obvious while the engine heats up from start from a cold state.

1. Check all connections of fuel-supply lines to the fuel highway, the fuel regulator of pressure and the fuel filter. Check each rubber fuel hose on all length for existence of gaps or cracks. Check leaks from corrugated connections between rubber and metal fuel-supply lines. Check connections between metal fuel-supply lines and a casing of the fuel filter. Also check area around fuel nozzles for a sign of ring leak.
2. To define leak of fuel between the fuel tank and a motor compartment, the car needs to be lifted. Examine a tank and a hose of a jellied mouth on punctures, cracks and other damages. This connection is especially unreliable.
3. Carefully check all rubber hoses and metal fuel-supply lines departing from a tank. Check the weakened connections, the worsened hoses, the twirled fuel-supply lines and other damages. Pay special attention to pipes of ventilation and hoses which are often overwound around a hose of a jellied mouth and can be blocked, doing a tank hardly filled. Follow fuel feeding and returnable hoses to a car pered, carefully examining them completely on signs of damage or corrosion. Change the damaged sections as required.

Engine oil

Examine area around a cover of a head of the block of cylinders, an oil filter and the surfaces of the socket of the pallet. Keep in mind that eventually in this area there can be very small leak and therefore what you really look for, these are signs of the serious leak caused by a rupture of laying. The engine oil filtering from under a cover of a gear belt of the drive or a case of coupling can be a sign of wear of sealing rings of the crankshaft or an entrance shaft of the transmission. If leak is found, then replace defective laying or oil consolidation.

Automatic transmission oil

Check the hoses conducting to an oil cooler ahead of a motor compartment regarding leak. Look for the defects caused by corrosion and damage from contact with the earth or dirt rejected from the surface of the road. Gearbox oil of usually red color.

Liquid in system of the amplifier of steering

1. Check the hose located between a nutritious tank and the pump of the amplifier of steering and a returnable hose from the shelf of management to a nutritious tank. Also check a hose of high pressure between the pump and the shelf of management.
2. Check the hoses conducting to a liquid cooler ahead of a motor compartment (in some models). Look for the defects caused by corrosion and damage from contact with the earth or dirt rejected from the surface of the road.
3. Pay special attention to corrugated connections and the area surrounding hoses which are fixed with adjustable brackets of steering transfer. Like gearbox oil, this liquid of red color.

The air conditioner (the cooling means)

The air conditioning system is filled with the cooling liquid which is under high pressure. If the air conditioning system is open and depressurized without the special equipment, liquid will immediately evaporate. If liquid contacts with your skin, it can cause a serious frostbite.

The dealer of Peugeot or the specialist in air conditioners has to be immediately warned about all suspicious leakages of the air conditioning system. Leak can be found on noticeable steady decrease in level of cooling liquid.


Emergence of moisture on drain tube of the condenser (gas cooler) under the car right after use of the conditioner – the normal phenomenon also should not be the cause for concern.

Brake fluid

Brake fluid – toxic agent with a watery consistence. New liquid almost colourless, but it darkens with time and at intensive use.

1. Check the field of connection of brake tubes with the main brake cylinder regarding leak. Check area around the basis of a nutritious tank for signs of the leak caused by defect of laying. Also investigate brake pipeline couplings in the ABS hydraulic device.
2. If loss of liquid is obvious, but leak cannot be precisely defined, the motor compartment, a support of brakes and a tube of the brake system have to be carefully checked on the lifted car. Leak of liquid from the brake system – serious damage which has to be corrected immediately.

Unknown leak of liquids

If there are signs of leak of any liquid, but you cannot distinguish type of liquid or an exact origin, then it is necessary to leave the car for long time and to put a big piece of paper or a rag under the car. It will help to find the place of course of liquid, and also will help to identify the following liquid on color. But keep in mind that some leaks can be shown only at the working engine.

Vacuum hoses

In spite of the fact that the brake system hydraulic, the amplifier of brakes increases the effort made for a brake pedal, using the vacuum in an inlet collector created during the operation of the engine. Vacuum is transmitted to the amplifier through a hose of big section. Any leakage of this hose will reduce efficiency of the brake system.

Besides, many of components, especially components of management of issue, are put in action from the vacuum created in an inlet collector through hoses of small section. Leak in a vacuum hose means that air is sucked in in a hose (but does not leave a hose), and it does leak very difficult for detection. The method of detection consists in using an old vacuum hose as some kind of stethoscope: you keep one end of a hose close to an ear (but not in fish soup), and use other end to explore the area around alleged leak. When the end of a hose directly is over the place of leak, the hissing sound will be clearly heard through a hose. It is necessary to avoid contact with hot and moving details since the engine when checking has to work. Replace all found untight vacuum hoses.