Generally
The O-ring that sits at the top of the water pump and seals against the water pipe in which the thermostat sits.
75 kr
The O-ring that sits at the top of the water pump and seals against the water pipe in which the thermostat sits.
If there is rust and corrosion damage on the surfaces that the O-Ring should seal against, place double O-Rings and glue with e.g. Glues and seals KEM-1003, Wait until the next day before filling with water so the glue has time to dry properly.