New aux coolant pump Changeover Valve (Sprinter 2014)

[@darrengrainger3083]

Hi Badasana. The switchover valve you replaced has an interesting job. When energized by the ECU it allows vacuum to pass to the coolant pump. This actually disengages the coolant pump and prevents it from circulating coolant around the engine. This only happens for a few minutes after start-up from cold, and allows the engine block to heat up more quickly. By the time you are ready to set off, the ECU will have de-energized the switchover valve, and the coolant pump will be circulating the coolant as normal 👍

[@badasanaexperiences]

Oooh thank you for the clear explanation! So it actually functions the opposite way than I understood earlier, and is not that critical during the summer temperatures 🌻🌴
Good to know in the future, as this engine appears to be sensitive to cold start-ups.

[@qaisfaresjordan]

Thanks it’s helped me a lot. Thank you.

[@badasanaexperiences]

@@qaisfaresjordan Hello, thank you very much! I'm happy to hear that 😊🌻🚐