14-12-2018, 07:16 PM
I was 20 minutes into a 50 mile journey in my 2005 2.0HDi Multispace (M59). The multi function display beeped and the message "High Engine temperature" (or something which meant the same) came up. I checked the temperature gauge and in the space of 5 seconds it went up from where it normally is to end of scale. The word STOP also appeared on the dash instrument. I did stop and checked the coolant level. It was normal. I got back in the car and everything was back to normal. Because I had a minor problem the previous day (the headlights stayed on when I turned them off - a further on and off and they were extinguished) I guessed the BSI needed to be reset.
I carried on, as I was some miles from home, and the same message came on a couple of times, again accompanied by the temperature gauge rising rapidly but then falling to normal within a few seconds. The engine ran completely normally. After about a further 20 mins the message did not appear again and I completed my journey, some of which was at 60 mph.
On the way home, again, after about 20 mins, the same message, but it was followed by "antipollution fault". Again the rapid rise and fall of the gauge. This happened a couple of times on the way home. In addition the yellow engine symbol was lit. Everything seemed to be normal, no excessive heat, smell etc. I watched the temperature gauge closely and noticed that the gauge did seem to vary a little, between perhaps 75 and 85 degrees C, possibly a little lower than is usual. I know these gauges are not that accurate but it is normally rock steady. I suspect the thermostat may possibly be stuck open and/or closed. If it sticks closed the temperature will obviously rise - but so quickly? - Within 5 seconds?. Then, if it opens and sticks open, the engine will be overcooled and so the anti pollution system might kick in.
Tomorrow I will reset the BSI but would appreciate any advice. Is it best to simply replace the thermostat? Is it an easy job? Has anyone else had this problem? All comments welcome.
I carried on, as I was some miles from home, and the same message came on a couple of times, again accompanied by the temperature gauge rising rapidly but then falling to normal within a few seconds. The engine ran completely normally. After about a further 20 mins the message did not appear again and I completed my journey, some of which was at 60 mph.
On the way home, again, after about 20 mins, the same message, but it was followed by "antipollution fault". Again the rapid rise and fall of the gauge. This happened a couple of times on the way home. In addition the yellow engine symbol was lit. Everything seemed to be normal, no excessive heat, smell etc. I watched the temperature gauge closely and noticed that the gauge did seem to vary a little, between perhaps 75 and 85 degrees C, possibly a little lower than is usual. I know these gauges are not that accurate but it is normally rock steady. I suspect the thermostat may possibly be stuck open and/or closed. If it sticks closed the temperature will obviously rise - but so quickly? - Within 5 seconds?. Then, if it opens and sticks open, the engine will be overcooled and so the anti pollution system might kick in.
Tomorrow I will reset the BSI but would appreciate any advice. Is it best to simply replace the thermostat? Is it an easy job? Has anyone else had this problem? All comments welcome.
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