Overheating

Overheating may be due to a fault in the engine and, in a water cooled engine, overheating accompanied by loss of power water generally indicate a fault somewhere other than in the cooling system, such as weak mixture, retarded ignition, or binding brakes, possibly the handbrake. Overheating due to a fault in the cooling system could be caused simply by a low water level. A common cause is a broken fan belt.

Another cause of overheating is restriction of water flow due to a deposit of " fur" in the system, because of the calcium content of the rater being high. The deposit may be effectively removed by using one of the proprietary " fur" removers.

Occasionally the radiator matrix, especially when it faces the direction of travel, becomes clogged with insects and dirt and its effeciency is in consequence reduced.

Задание 3. Переведите словосочетания с определениями, обра­зованными по моделям.

Water cooled engine; cooling system; retarded ignition; binding brakes; water level; fan belt; water flow; calcium content; " fur" removers; radiator matrix.

Задание 4. Расскажите о причинах перегрева двигателя с водяным охлаждением.

Задание 5. Просмотрите текст и озаглавьте его.

Air cooled engines run at very much higher temperature than water cooled engines do. Air cooled engines heat up more quickly than water cooled engines do and this reduces cylin­der wear slightly; it also reduces fuel consumption during the heating — up period. Air cooling also eliminates the need for a radiator and its connecting hoses, thermostat and water cooled engine is the fact that it is very much quieter due to the noise deadening effect of the water jacket round the cylinder.

Задание 6. Найдите русские эквиваленты для следующих английских слов и словосочетаний:

A. To run; to heat up; to reduce; cylinder wear; fuel consump­tion; to eliminate; to require; noise deadening effect.

B. Потребление топлива; снижать; работать; шумопоглощающий эффект; нагреваться; износ цилиндра; устранять; требовать.

Задание 7. Укажите преимущества и недостатки двигателя с…

a) воздушным охлаждением;

b) водяным охлаждением.

Задание 8. Просмотрите текст “ Anti-freeze” и найдите ответы на вопросы.

1. Как может пострадать двигатель при отсутствии антифриза?

2. Каково соотношение воды и антифриза в системе охлаждения?

3. Какие 2 способа заправки системы охлаждения антифризом Вы знаете?