Andyww Posted August 31, 2022 Report Share Posted August 31, 2022 Removing the thermostat should be a last resort, its a big task, but if you do, in order to test it you have to put the whole housing in a big pan of water and boil it up and wait a few mins. Even if its working properly it wont open if you simply pour hot water into it. Presumably you have bled the rad, it sounds like an air lock. The gauge can read high in this case as the sender can be out of the water flow so it is measuring the temperature of steam in the pipe instead. With the filler cap off try violently squeezing the left hand rad hose which can be reached through the LH wheelarch as this can sometimes dislodge air pockets and make a big glugging noise then you can top up. Jacking up the front or rear of the car can help also, and open rad bleed tap. If the air lock is really persistent it could be air getting into the system. These cars are unfortunately very prone to pinhole leaks in the cooling system if the aluminium pipes have not been checked/replaced. There are two versions of the Otter switch with different temperatures, manual covers these. but in normal driving the fans dont come on usually. Only when stuck in traffic, stationary. Infra red gauges dont indicate water temperature so I am not sure they are worth bothering with. Not sure why the gauge was reading 60 when sender in boiling water. Doesnt sound right but its wrong in the opposite way to expected. The gauges do go out of whack, even mounting the mechanical voltage regulator the wrong orientation can cause them to be 15 degrees out. 1 Quote Link to comment Share on other sites More sharing options...
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