G'day all. I'm wondering if the great wide world of Defender enthusiasts has come across the problem that my Defender has developed. It's loosing coolant through the pressure cap, but only when I've driven it for about 40 kilometres (25 miles) or more. Below that mileage everything is OK - the top hose is rock hard and there's no loss of coolant. It loses almost a litre of fluid on a round trip of 160 kilos to work and back. I have an EMS2 engine monitoring system and all readings are normal. EGT about 400 degrees C. Coolant temp 86 degrees after 5 kilos rising to max of 96 a few kilos later, though normally runs about 92. No perceivable loss of power from the engine or steam from the exhaust. I've tried 2 new pressure caps without them making any difference. Engine has done nearly 270k kilos. It's got me beat, so any thoughts on the possible cause would be greatly appreciated. Reg from Victoria Oz
- posted
13 years ago