Darrenkidney Posted August 15, 2020 Share Posted August 15, 2020 Hi!in warm weather (> 25 dC) I very quickly reach 100dC water temperature. Oil stays stable at 80-85 dC and pressure drops to around 1 (dry sump).And this just when pushing for a few minutes on county roads. 10 mins of less aggressive driving gets me down to 80-90 dC. Any thoughts?Regards,Darren. Link to comment Share on other sites More sharing options...
SM25T Posted August 15, 2020 Share Posted August 15, 2020 Has it always been like this or a sudden change ? Do all hoses get equally hot ? Is the fan coming on ? What rating fan switch on/off ? What setting thermostat ? Link to comment Share on other sites More sharing options...
Darrenkidney Posted August 15, 2020 Author Share Posted August 15, 2020 It's my first summer with the car. Wasn't aware of fan coming on - it one of the things I will check after the car cools down - was just back in when I wrote above. No idea how to check on/off rating of fan and thermostat. Any tips?(it's an Alu radiator) Link to comment Share on other sites More sharing options...
SM25T Posted August 15, 2020 Share Posted August 15, 2020 The fan switch has the on and off settings etched on it. Thermostat ... you have to remove it to see what is stamped on it. Take the opportunity to test it in a saucepan of water and see what temperature it opens at with a thermometer. Link to comment Share on other sites More sharing options...
SM25T Posted August 15, 2020 Share Posted August 15, 2020 Does this car have an electric temperature gauge ... the Rover k-series cars used a poor quality Caerbont sender which can give unreliable readings as it fails Link to comment Share on other sites More sharing options...
Tazio Posted August 15, 2020 Share Posted August 15, 2020 First easy thing to do is check the operation of the fan control switch. Remove the connector on the switch, short the pins together to mimic the fan switch making contact, does the fan come on?, if so it's the switch. Link to comment Share on other sites More sharing options...
ECR Posted August 16, 2020 Share Posted August 16, 2020 Oil pressure drops to about 1?1 bar, 14psi when driving? Link to comment Share on other sites More sharing options...
SM25T Posted August 16, 2020 Share Posted August 16, 2020 Hoped that was a hot tickover Link to comment Share on other sites More sharing options...
alan c Posted August 16, 2020 Share Posted August 16, 2020 My VX also gets to 100c on hot days, did one long run to Le Mans when it as was at that level for a long time.it was worse when I first acquired it about 13 years ago but changing to a new radtec aluminium radiator helped and I have the larger dia fan that they do. I think I may also have installed a thermostat that opens at a lower temp but I am not certain about that as it was 10+ years ago i have mechanical gauges and water temp is nearly always higher than water temp, I am tempted to fit a laminova to balance the temps but I don't think it's essential. if you don't have one it worth getting a heat shield between the exhaust and the alternator - on long run to Le Mans the engine was fine but I discovered the alternator was cooked when I got home.More recently and for other reasons I had the engine rebuilt and it generally runs cooler now but will still be close to 100 on hot days - we have done some long runs in very high temps across France and Spain.Worth checking everything is working correctly but not sure you should be too worried, that said I would recommend getting good mechanical gauges for water temp and oil temp/pressure Link to comment Share on other sites More sharing options...
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