Some drivers may find that their tunnel loader and engine water temperature gauge always show that the temperature is too high. What is the reason? Today, let's analyze the causes of high engine water temperature.

判斷發(fā)動(dòng)機(jī)的水溫是否過(guò)高，主要看發(fā)動(dòng)機(jī)水溫表，發(fā)動(dòng)機(jī)的水溫表表示的是發(fā)動(dòng)機(jī)冷卻液的溫度，溫度的正常范圍在60℃-100℃，如果超過(guò)了這個(gè)溫度，表示發(fā)動(dòng)機(jī)水溫過(guò)高。

To judge whether the water temperature of the engine is too high, it mainly depends on the engine water temperature gauge. The engine water temperature gauge indicates the temperature of the engine coolant. The normal range of temperature is 60 ℃ - 100 ℃. If it exceeds this temperature, it indicates that the engine water temperature is too high.

造成發(fā)動(dòng)機(jī)水溫高的原因：

Causes of high engine water temperature:

1、散熱器內(nèi)防凍液水位過(guò)低

1. The antifreeze level in the radiator is too low

此時(shí)需要檢查副水箱的水位，如果水位低于警戒值，需要補(bǔ)充防凍液。

At this time, check the water level of the auxiliary water tank. If the water level is lower than the warning value, add antifreeze.

2、散熱器堵塞

2. Radiator blocked

散熱器上如果污垢過(guò)多或者堵塞，會(huì)影響散熱器的散熱效果。

Excessive dirt or blockage on the radiator will affect the heat dissipation effect of the radiator.

3、水泵損壞，水泵皮帶過(guò)松

3. The water pump is damaged and the water pump belt is too loose

水泵損壞，會(huì)導(dǎo)致不能將冷卻液輸送到散熱器中進(jìn)行散熱，水泵皮帶過(guò)松，會(huì)導(dǎo)致輸送水量不足。

If the water pump is damaged, it will not be able to deliver the coolant to the radiator for heat dissipation. If the water pump belt is too loose, it will lead to insufficient water delivery.

4、水管損壞，水泵吸入空氣

4. The water pipe is damaged and the water pump sucks air

水管損壞，水泵吸入空氣，導(dǎo)致輸送冷卻液不足。散熱效果下降。

The water pipe is damaged and the water pump sucks air, resulting in insufficient coolant delivery. The heat dissipation effect decreases.

5、節(jié)溫器損壞

5. Thermostat damaged

節(jié)溫器的工作原理：當(dāng)冷卻溫度低于規(guī)定值時(shí)，節(jié)溫器感溫體內(nèi)的石蠟呈固態(tài)，節(jié)溫器閥在彈簧的作用下關(guān)閉發(fā)動(dòng)機(jī)與散熱器之間的通道，冷卻液經(jīng)水泵進(jìn)入發(fā)動(dòng)機(jī)，進(jìn)行發(fā)動(dòng)機(jī)內(nèi)小循環(huán);當(dāng)冷卻液溫度達(dá)到規(guī)定值后，石蠟開始融化逐漸變?yōu)橐后w，體積隨之增 大并壓迫推桿，推桿對(duì)閥門的反推力使閥門開啟，此時(shí)冷卻液進(jìn)入散熱器進(jìn)行大循環(huán)。

Working principle of thermostat: when the cooling temperature is lower than the specified value, the paraffin in the thermostat sensing body is solid, the thermostat valve closes the channel between the engine and the radiator under the action of the spring, and the coolant enters the engine through the water pump for small circulation in the engine; When the coolant temperature reaches the specified value, the paraffin begins to melt and gradually becomes liquid, the volume increases and compresses the push rod, and the push rod's reverse thrust on the valve opens the valve. At this time, the coolant enters the radiator for large circulation.

節(jié)溫器損壞會(huì)導(dǎo)致散熱系統(tǒng)只進(jìn)行小循環(huán)，冷卻液不進(jìn)入散熱器。排查發(fā)動(dòng)機(jī)系統(tǒng)故障時(shí)，我們要本著先易后難的原則，先排查維修比較簡(jiǎn)單的故障點(diǎn)，再排查維修比較難的故障點(diǎn)。

Damage to the thermostat will cause only a small circulation of the cooling system and the coolant will not enter the radiator. When troubleshooting the engine system, we should follow the principle of easy first and then difficult, first troubleshooting the fault points with relatively simple maintenance, and then troubleshooting the fault points with relatively difficult maintenance.