_LM46 Posted March 14, 2020 Report Share Posted March 14, 2020 Hello, my girlfriends VW Lupo 1.4 S (not sport) has a problem where it is overheating, after trying a few things having the heater on full blast keeps the engine at the right temp but if you turn it off it will start to creep up and overheat again, it has got enough coolant, it has enough oil, any suggestions? Thanks Quote Link to comment Share on other sites More sharing options...
LR5V Posted March 14, 2020 Report Share Posted March 14, 2020 Try these for starters, with engine up to temperature: Cooling Fan not switching on - faulty thermostatic switch or wiring thermostat jammed closed - feel the coolant pipes going to the radiator, they should be hot sediment in radiator - remove front grille and reach down running your hand over the radiator, should be consistently warm all, if it’s cold in areas it is likely to be sediment, this reduces the amount of cooling capacity. Unless your windows don’t open - just keep the heating on till you get it sorted. Quote Link to comment Share on other sites More sharing options...
weslangdon Posted March 14, 2020 Report Share Posted March 14, 2020 Do get it sorted though as it risks your head gasket or your heater matrix Quote Link to comment Share on other sites More sharing options...
Rich Posted March 14, 2020 Report Share Posted March 14, 2020 Change the thermostat and the housing. Should sort it. Quote Link to comment Share on other sites More sharing options...
_LM46 Posted July 11, 2020 Author Report Share Posted July 11, 2020 Changed the thermostat and housing, flushed the radiator completely, The fan works, still the same problem, radiator not warm at all, bottom radiator pipe stone cold while the top one is hot, any ideas? Quote Link to comment Share on other sites More sharing options...
mk2 Posted July 11, 2020 Report Share Posted July 11, 2020 Water pump impellor disintegrated is my guess... Quote Link to comment Share on other sites More sharing options...
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