Binza32 Posted April 9, 2012 Report Share Posted April 9, 2012 I'm new to BMW's and have recently bought a 2004 330D 204 HP. The car's travelled 170,000 miles. I've been observing the coolant temperature on the OBD and the temperature rises to about 95 Celsius after 15-20 mins of driving. Thereafter it fluctuates between 98c - 104c. This seems a bit high to me and I'm wondering if maybe I have a problem with a thermostat not opening fully. Alternatively, maybe my radiator is scaled up. Any advice would be much appreciated! Quote Link to comment Share on other sites More sharing options...
CliffThomson Posted April 9, 2012 Report Share Posted April 9, 2012 Tried sitting it in traffic and seeing where it sits? C. Quote Link to comment Share on other sites More sharing options...
And617y Posted April 9, 2012 Report Share Posted April 9, 2012 welcome to the zone matey the coolant is at a high temparature in these cars, long as your temp gauge in car is halfway it ok. sure a few other zoners will be along to advice you more Quote Link to comment Share on other sites More sharing options...
marc l Posted April 9, 2012 Report Share Posted April 9, 2012 Hi my 1.9 m43 runs at 100-105 Thermostat opens at 105 on mine might be similar to yours Quote Link to comment Share on other sites More sharing options...
PeterH Posted April 9, 2012 Report Share Posted April 9, 2012 Mine runs about 87 on average. Not sure about diesels though... Quote Link to comment Share on other sites More sharing options...
mit Posted April 9, 2012 Report Share Posted April 9, 2012 I'm new to BMW's and have recently bought a 2004 330D 204 HP. The car's travelled 170,000 miles. I've been observing the coolant temperature on the OBD and the temperature rises to about 95 Celsius after 15-20 mins of driving. Thereafter it fluctuates between 98c - 104c. This seems a bit high to me and I'm wondering if maybe I have a problem with a thermostat not opening fully. Alternatively, maybe my radiator is scaled up. Any advice would be much appreciated! I think this is normal. Quote Link to comment Share on other sites More sharing options...
Rich_D Posted April 9, 2012 Report Share Posted April 9, 2012 I wouldn't worry Quote Link to comment Share on other sites More sharing options...
Binza32 Posted April 10, 2012 Author Report Share Posted April 10, 2012 Thanks for you input, much appreciated! It sit at 100c in traffic. Also the needle gauge is steady in the middle position once warmed up so it seems like the system is operating normally. I may still consider changing the pump, thermostat and header tank as a preventative maintenance measure. Not sure if the current parts are the originals or not! Cheers. Quote Link to comment Share on other sites More sharing options...
Scarab 330ci Posted April 18, 2012 Report Share Posted April 18, 2012 Let us know if it's the same after, my 330ci sport sits around the 100c mark, goes down to 95c in town, but can rise to 105c, again im not sure if this is normal? Quote Link to comment Share on other sites More sharing options...
CliffThomson Posted April 19, 2012 Report Share Posted April 19, 2012 Diesels are happy between 90-105c Petrols are happy between 95-110c. The diesel engine is more efficient at a cooler temp. In traffic expect both to get up to around 110 tops before the main stat fully opens. hope this helps everyone. C. Quote Link to comment Share on other sites More sharing options...
