2015 Vauxhall Vivaro coolant blowing off from header tank after travelling circa 10 miles. water pump, radiator and thermostat changed to no avail!!! 2015 vivaro 1.6. where should i investigate next, does anyone have a suggestion please?

Car: Vauxhall Vivaro
Year: 2015
Variant: 1.6 cdti
Categories: Leaks & Noises
Water blowing off via pressure cap. Radiator, water pump, thermostat and water gas/ head gasket check clear but problem still present!!! Where should I investigate next?
Posted: Mar 30, 2022 (2 years ago)
Faulty cap ? Is engine coolant fan kicking in o.k .Take it you had a BLOCK test done on cooling system .
Posted Mar 30, 2022 (2 years ago)

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