This Vauxhall Grandland came to me with a slow coolant loss and intermittent overheating. These types of faults can be particularly challenging to diagnose, especially when there are no obvious signs of a leak.
To get to the root of the problem, I carried out a series of diagnostic checks, including:
- Cooling system pressure testing
- Head gasket testing
- In-depth cooling system diagnostics
After carefully investigating, I discovered the original fault was a leaking radiator. The leak had partially sealed itself over time, making it much more difficult to detect during inspection. By methodically working through the diagnostic process, I was able to pinpoint the source of the coolant loss.
The repair included:
- Faulty radiator replaced
- Cooling system refilled with the correct coolant
- Cooling system professionally bled to remove trapped air
- Final pressure and operational checks carried out to ensure the system was leak-free and maintaining the correct operating temperature
This repair highlights why a proper diagnostic approach is so important. Intermittent coolant leaks can easily be missed, leading to repeated overheating and potentially serious engine damage if the underlying cause isn’t found.
If your vehicle is losing coolant, overheating, or you’re constantly having to top up the expansion tank, don’t ignore it. Get in touch for professional mobile diagnostics, servicing and repairs across Huntingdonshire and the surrounding areas.
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