Hello, on my 850er (petrol, 2.5l) the 3rd cooler is already over. Before I install a new one again, I thought I was looking for the cause… Could a defective water pump possibly contribute to this?It was not changed during the last timing belt change (why always?) The mechanic in the screwdriver hall said after the last cooler installation, that there was somehow too much pressure on the system…? Greetings