tinker Posted December 24, 2008 Share Posted December 24, 2008 Ok chaps, posting this fo ra friend with no internet...yet! the heater on his 300tdi has started to blow cold, it happened after a driving home, he said it was all nice n warm, the temp gauge then started to rise, then dropped down agian, it did`nt reach the red, there was some evidence of water loss from the left hand side of the engine compartment, looked like it was from around the expansion bottle to me. We checked to see if the water pump is pushing water, ie left cap off and revved the engine to see if the water rose, it did. the water pipes are all warm, there not rock hard when engine at operating temp and no oil in water, there is no sign of air in system either, the heater pipes are both warm also...the temperature is stable now as well, so im thinking its maybe the heater matrix. I told him to remove the pipes and back flush the matrix, it may have a blockage, then again both pipes are warm!! Any thought guys? Quote Link to comment Share on other sites More sharing options...
lrfarmer Posted December 24, 2008 Share Posted December 24, 2008 i would think it's got low on water got hot and now theres an air lock in the heater matrics but he may have the head gas get going Quote Link to comment Share on other sites More sharing options...
tinker Posted December 24, 2008 Author Share Posted December 24, 2008 he has just been for a ride around in it, he says the temp is rising above where it normally is....head gasket me thinks?? Quote Link to comment Share on other sites More sharing options...
lrfarmer Posted December 24, 2008 Share Posted December 24, 2008 may pay to check the Thermostat first Quote Link to comment Share on other sites More sharing options...
tinker Posted December 24, 2008 Author Share Posted December 24, 2008 well just checked when he returned, it has lost all the water from expansion tank so........headgasket Quote Link to comment Share on other sites More sharing options...
nicedayforit Posted December 24, 2008 Share Posted December 24, 2008 well just checked when he returned, it has lost all the water from expansion tank so........headgasket The expansion tank hasn't split has it? Normally goes around the horizontal seam. Quote Link to comment Share on other sites More sharing options...
filthy Posted December 24, 2008 Share Posted December 24, 2008 The expansion tank hasn't split has it? Normally goes around the horizontal seam. Before you spend a lot of time stripping an engine, change the stat for the sake of £5 & check the expansion bottle. You may get lucky. good luck Filthy Quote Link to comment Share on other sites More sharing options...
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