mobius Posted April 10, 2014 Share Posted April 10, 2014 Hi my car has just been in for a matrix change (demisterman) one, Got car back drove 5 miles then on idle temp gauge goes from normal to just below red as soon as I drive away temp starts to fall to normal. First time it did it noticed a leak on the carpet from new matrix and symptoms as described lost about 1ltr of coolant. Drove back to garage and they have had for another few days could not find leak from matrix and could not get car to overheat. Initial thoughts possibly an air lock. Picked car up today on drive home same happened but no leak from matrix. Had hc test done on coolant system so head gasket appears to be ok. Any ideas or is this a characteristic of demisterman matrix Any ideas Link to comment Share on other sites More sharing options...
mobius Posted April 10, 2014 Author Share Posted April 10, 2014 At least they gave me a nice courtesy car Nissan 350z:d Link to comment Share on other sites More sharing options...
Ric Posted April 10, 2014 Share Posted April 10, 2014 airlock? Edit, you said that, and thats what i'd expect. Link to comment Share on other sites More sharing options...
stevie_b Posted April 10, 2014 Share Posted April 10, 2014 I agree with the airlock theory. As for the leak, have the garage done a pressure test on the cooling system? Link to comment Share on other sites More sharing options...
mobius Posted April 10, 2014 Author Share Posted April 10, 2014 Yes pushed system to 3 bar all good no leaks Link to comment Share on other sites More sharing options...
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