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View Full Version : Charge Air Coolant Pump running after engine stop



mattyjee1
5th June 2025, 10:45 PM
Hi All,

I'm new to Disco 5 after 8 years of owning a D4.

I have a 2019 SD6 HSE Lux, when i turn the engine off, I can hear the charge air coolant pump continue to run for several minutes after. It's a low hum but changes in pitch (sounds a bit odd). My question is, is this normal or do I have an issue? Gap IID shows no related faults.

Also, when the car is off, even when locked, i hear a rhythmic click coming from the rear of the engine somewhere - when this happens i also hear a relay in the engine junction box click on and off (seemingly in response - its ever so slightly timed after the initial click which i can't pinpoint). The relay is R2 for the main air fan. I also think i can hear another relay nearby clicking on and off.

Is this also normal, or any clues?

Cheers.