Is It Necessary to Use OEM Thermostats?
1 Answers
It is recommended to use OEM parts as thermostat assemblies generally do not fail easily. More information about thermostats is provided below: 1. Maintain good working condition: The thermostat must remain in good working condition; otherwise, it can severely affect the engine's normal operation. For example, if the thermostat opens (referring to the main valve) too late or fails to open, it can cause engine overheating. Conversely, if it opens too early, the engine's warm-up time will be prolonged, resulting in the engine running too cold. 2. Working principle: Under normal circumstances, when the engine is started cold, the operating temperature is very low. To allow the temperature to rise quickly, the thermostat controls the coolant flow (with the main valve closed), directing the coolant pumped by the water pump into the bypass pipe, bypassing the radiator—this is known as the small circulation. Once the coolant temperature reaches 87°C, the thermostat valve opens, allowing the coolant to flow through the radiator, transitioning the cooling system into the large circulation. Typically, within about five minutes after a cold start, the coolant temperature should reach the normal operating range of 85–105°C. If the engine takes too long to reach the normal operating temperature or if the temperature rapidly exceeds 110°C, it may indicate a thermostat malfunction.
