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Replace a Spare part Ignition Distributor – a defective one or if the limit of use has been already reached. Find out useful information about Ignition Distributor

Ignition distributor is necessary in the ignition system to ensure break of low voltage and distribution of high voltage in the engine cylinders. This car part is no so complex. It consists of a distributor and breaker. For reliable operation of the breaker it includes housing, drive shaft, movable and fixed discs, cam and spark advance controls. As for the breaker contacts, they are made of a refractory metals - tungsten. The rotating cam pushes the isolated breaker lever and thereby opens the contacts so many times as there are lobes on the cam. As a rule, the number of lobes on the cam is equal to the number of engine cylinders.

The cam is connected to the drive roller breaker, which is driven by the camshaft on the centrifugal regulator. In addition, with the crankshaft speed increasing governor weights and weights pins, which are moving in the slots of the plate and turn it and the cam shaft in the direction of the drive shaft, widen out. The result of this complicated process is the fact that the cam opens the breaker contacts and thus increases the ignition lead angle. Depending on the operating conditions an optimum ignition lead angle is selected that directly affects the thermal regime, power and engine efficiency.

In addition to the centrifugal there is also vacuum regulator, which provides ignition lead angle changing according to load of the car engine. The most common breakage of the distributor is failure of high-voltage wires. However, cracks on the lid, worn carbon contacts in the cap, the defect of the thumb, high resistance of the cable or the tip of a candle - all this can also cause failure of the ignition distributor. In this case do not buy new car parts in the workshop. It will be cheaper and easier to buy any car parts, such as generator, starter or nozzle in our online store.

Ignition Distributor for SEAT TOLEDO I (1L), VW KAEFER, VW KAEFER

Faults of ignition distributor
  • mechanical damage to the distributor body;
  • pollution of distributor cap;
  • wear of coal contact;
  • wear or damage to distributor rotor arm;
  • oxidation of distributor contacts;
  • wedge of advance regulator bearing;
  • failure of the Hall sensor (in breakerless distributor);
  • normal wear and tear of the distributor.
Symptoms of ignition distributor failure
  • no ignition;
  • hindered engine start;
  • increased resistance of ignition cable;
  • interruptions in the engine performance when idling;
  • silencer pops;
  • increased fuel consumption.
Causes of faulty ignition distributor
  • exceeding the part life;
  • oil or moisture ingress on the mechanism;
  • use of low-quality fuel;
  • untimely replacement of the spark plugs;
  • functional failure of the coil;
  • Incorrect order of distributor terminals attachment;
  • insufficient capacity of the ignition coil;
  • failure of the rotor arm fuse.

The main indicator of the mechanism operability is its resistance. To measure resistance, connect an ohmmeter to contacts. Average resistance value between terminal G and earth is in the range of 20-31 ohms, and between the terminals A and B is 0,49-0,73 ohms. However, the exact number is necessary to look in the vehicle technical documentation.

Typically the distributor test is carried out at a planned ignition system diagnostics, which is required after 30,000 kilometers.

Repair of the ignition distributor

Repair of ignition distributor is conducted only at service stations. The fact is that the distributor sensors are very fragile, so any carelessness may cause malfunction of the entire system.

In case of mechanical damage to ignition distributor cover it is replaced. When there are defects of individual components, only defective parts can be replaced. You only need to check the compatibility, as well as to measure the resistance in the assembled distributor. If when removing the cap coal contact falls off, it is necessary to replace the spring and the coal.

Replacing the ignition distributor

Complete replacement of ignition ditributor is produced in case of serious mechanical damage, or the end of the part service life.

Disconnecting the distributor independently is difficult. To do this, remove the rotor, disconnect cables and mounting of the ignition coil and a capacitor. This type of work requires no special tools, but it takes time. In addition, it is essential to mark the order and contact pairing, because the wrong pair connection can cause failure of the entire system.

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