I was out in my BN7 a few days ago and the engine temperature started to increase rapidly. It normally runs about 185F, but on this occasion it reached 220F. I pulled over and stopped and let the engine cool down. When I checked the coolant level it was down and took about 2 litres to fill up. I set off again, but after a kilometer the temperature was back up to 220F again. At home it needed another 2 litres to fill the radiator up again.
I have removed the radiator, but there doesn seem to be any sign of leaked coolant on the fins. The radiator hoses don't show signs of holes either. The engine block held plenty of coolant; I would guess maybe 5 litres or so.
I have taken the radiator to a repair shop and the gentlemen who peered inside said he thought the radiator was blocked.
I am wondering what the cause of the sudden rise in engine temprerature could be.
I have been given three possibilities: blocked radiator, stuck thermostat and blown core plug in the engine block. Given the engine block had plenty of coolant in it, I am dubious about the blown core plug possibility.
I would be gtateful for any opinions on the problem and the three likely possibilities.
Crusty.
I have removed the radiator, but there doesn seem to be any sign of leaked coolant on the fins. The radiator hoses don't show signs of holes either. The engine block held plenty of coolant; I would guess maybe 5 litres or so.
I have taken the radiator to a repair shop and the gentlemen who peered inside said he thought the radiator was blocked.
I am wondering what the cause of the sudden rise in engine temprerature could be.
I have been given three possibilities: blocked radiator, stuck thermostat and blown core plug in the engine block. Given the engine block had plenty of coolant in it, I am dubious about the blown core plug possibility.
I would be gtateful for any opinions on the problem and the three likely possibilities.
Crusty.