The radiator return hose. Thin narrow hose that goes across the top of the radiator to the expansion bottle. It had fallen down by the fan and had some pin prick holes in it from the fan.
Seems likely it fell after being dislodged when then the car was repaired a couple of years ago by a Volvo dealer under warranty. The car hasn't been used that much due to Covid since the repair.
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XC60 B5 Ultimate Dark (MY23) Denim Blue, Blonde Leather, Dashcam, 255/45R20 tyres.
Ford Transit diesel based Chausson Motor Home
1973 Ford Cortina 1.6 XL
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