17.4. Glow plugs


Glow plug arrangement on the diesel engine with a turbo-supercharging

Check

PERFORMANCE ORDER
1. Connect the voltmeter between the feeding tire of candles of an incandescence and weight. Include ignition and check that tension to candles moves in the corresponding interval of time. Time of giving of tension to glow plugs increases at lower temperatures and decreases at temperature increase. If tension moves to glow plugs, the relay and electric conducting means are serviceable.
2. For check of serviceability of a glow plug disconnect from it the tire of giving of tension. Using a tester, check resistance between contact in the top part of a candle and the candle case. Resistance of a glow plug makes 1,5 Ohms and if the tester shows bigger resistance, the glow plug is faulty.
3. In the presence of the ampermeter measuring big currents connect it between the feeding tire and the top contact of a glow plug. Give tension on a glow plug and measure the current consumed by a candle. If the current consumed by a candle exceeds 15 A, so the glow plug is faulty.

Removal

Elements of connection of the feeding tire to a glow plug
1 – nut;

2 – the feeding tire;

3 – glow plug

Glow plug arrangement on the diesel engine without turbo-supercharging

PERFORMANCE ORDER
1. Remove a weight wire from the accumulator.
2. Unscrew a nut and remove the feeding tire from the top part of a glow plug (see rice. Elements of connection of the feeding tire to a glow plug).
3. Unscrew a glow plug from a head of the block of cylinders (see rice. A glow plug arrangement on the diesel engine without turbo-supercharging).

Check of the candles of an incandescence removed from the engine

PERFORMANCE ORDER
1. Check each glow plug for existence of mechanical damages. The burned or destroyed tips of a glow plug can be from a bad stream of dispersion of fuel a nozzle. If there is such damage it is necessary to check and if necessary to replace fuel nozzles.
2. If glow plugs have no mechanical damages, check their electric resistance which has to be less than 1,5 Ohms.
3. Operability of candles of an incandescence can be checked, giving on them 12 volts. At the same time they have to heat up evenly and for the required time interval. At the same time it is necessary to observe precautions:

– To hold a glow plug a special clip or flat-nose pliers.
– The electric power-supply circuit of a glow plug has to have the fuse.
– After check the glow plug has to be cooled within several minutes.

4. The glow plug in good shape heats up to reddening of the working horseman within 5 seconds. At longer heating or heating in a middle part, but not on the end of a candle the candle is faulty and is subject to replacement.

Installation

PERFORMANCE ORDER
1. Installation is made in the sequence, the return to removal. At the same time a carving part of a glow plug needs to be greased with antiprigarny structure on the basis of copper.