mikehiggins Posted August 7, 2018 Report Share Posted August 7, 2018 My Spit is fitted with a full width rad (recently reconned), side air deflectors, and a good quality pull electric fan which comes in at the point where the needle passes the rh level on the meter. A new 74 degree thermostat is fitted. Still she runs with the needle on the high side in motion. With the engine hot and the needle indicating high I have let the engine idle and monitored the result, which is that the air coming through the fan is relatively cool, the bottom of the rad is a little hotter but the top of the rad is hot and the fan is constantly engaged but seems to have only a very slow effect on the needle. My logic is pointing me to the water pump but any other suggestions would be appreciated please. Thanks in advance, Mike. Link to comment Share on other sites More sharing options...
mpbarrett Posted August 7, 2018 Report Share Posted August 7, 2018 might be obvious but are you sure its hot and not a temperature gauge problem? It will run hotter in this weather on my 1500 herald with a new standard size radiator it goes higher up the gauge than normal when idling but then stops moving and doesn't get any hotter even when it been 30C outside. I only have the mechanical fan on it. You can buy very cheap IR sensors to check the actual temperature. cheers mike Link to comment Share on other sites More sharing options...
Pete Lewis Posted August 7, 2018 Report Share Posted August 7, 2018 yes i agree there many spent a season changing and funding all sorts of supposed cooling improvements when they have the wrong temperature sender or a voltage stabilised problem at risk of repeating thermo bi metal stabilised gauges need a GTR108 or equivalent fast moving iron non stabilised use 121997 mix them up even in the parts bin and you get hot reading on the gauge we had a member on the old forum change an engine because of this ....its very common a 74c thermostat is low it should for uk and european climates be a 82c to get the mixture correct , cold engine equals rich mixture and bore washing not recomended Pete Link to comment Share on other sites More sharing options...
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