dwdevlin Posted February 3, 2019 Share Posted February 3, 2019 Hi there ,,,should there be pressure in the expansion tank when cold etc,,2012 connect trend 1.8 tdci ,,new water pump,thermostat, radiator and head gasket all done ,,,always runs on the cool side. , half way when on motorway etc but drops to around the quarter mark when in town,,,cheers derek Quote Link to comment Share on other sites More sharing options...
G B L Posted February 3, 2019 Share Posted February 3, 2019 how much pressure, could it be a vacuum? if the Radiator cap vacuum brake is bad then it could hold a vacuum and that would make a noise on opening the cap! Quote Link to comment Share on other sites More sharing options...
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