Originally Posted by tony xa
Oil in the water .
As ch7472 said head gasket or head
On a similar note, my Falcon temp guage was all over the place over the weekend. Engine seemed to run fine, but whilst standing still or in slow moving traffic the guage was reaching to the top. After pulling away and giving it some gas the temp guage would drop again big time, but would then creep up again at the lights.
I've taken a look in the radiator and the coolant looked quite rusty and foamy. So am presuming the radiator's playing up, or just has a backload of rust sitting in it, but I'm quite surprised the car would run as smoothly as it did after pulling away.
Any other possibilities? Thermostat shot? Or maybe the water pump's on it's last legs? Any advice would be appreciated.