Description
Function of the Thermostat
The thermostat regulates engine temperature by controlling coolant flow between the engine and radiator. It stays closed when the engine is cold (allowing it to warm up quickly) and opens at the correct temperature to allow coolant circulation. A stuck-closed thermostat causes overheating. A stuck-open thermostat prevents the engine from reaching operating temperature, reducing efficiency, increasing fuel consumption, and preventing the heater from working properly.
Why order it from Partszar
Overheating is the fastest way to turn a small cooling part into a head gasket or a warped cylinder head. A vehicle should never be driven on a cooling fault. With this fitted the temperature needle stays where it belongs.
- Fitment checked before it is listed. Every part is cross-referenced against the official parts catalogue and OEM part number so it fits first time. If your vehicle is listed above, this is the one you need. Not sure? Send us your VIN using the contact form below and we confirm the exact part for free, no obligation.
- Dispatched fast, tracked to your door. In-stock parts leave within 1 to 2 business days and reach you anywhere in South Africa in 2 to 5 business days with tracking. Back-order parts are sourced directly from our supplier, typically 3 to 4 weeks, and we keep you updated by email.
- Decide with confidence. Selected parts carry our 6-month limited guarantee when fitted by an RMI-approved mechanic. Not sure about anything? Contact us below before you order.
Need more info regarding GWM Thermostat GW4D20?







Reviews
There are no reviews yet.