Mystery cooling problems with One 2003 1.4D
I've been looking in the forums for anyone who has had similar problems to me, but no luck!
Anyway, since about Dec 2013 I've noticed that the high intensity fan (stage 2 or whatever it's called - the noisy fan) came on intermittently whilst I was driving. Aircon wasn't on, and coolant level was OK. I didn't notice any particular pattern to it, but just ignored it (oops).
Since then, it has gotten gradually more and more frequent, with the loud fan staying on for longer and longer periods of time. Checked engine oil, no signs of head gasket failure. I'm needing to top up my coolant by about 1-2 pints per day (I drive around 60 miles per day). Also, I have noticed a gurgling/whooshing sound when driving, which occurs at both low and high speeds. The car is still driveable, and the temp gauge never changes, even when the fan is running.
I had a pressure test done and that was OK, but the Mini specialist said there was a head gasket problem. I check the oil weekly, and there are no signs!
So I went to an independent garage, and they said there is an internal coolant leak into one of the cylinder heads. Buuuuuut, the car drives exactly how it used to do (unless the fan is on, then it feels a bit sluggish but that is expected).
The guy plugged it into a code reading machine, and it came up with 'electric fan' and 'auxiliary water pump' being the 2 problems. But again, this guy insisted it was the head gasket and not the 2 problems the machine picked up.
Unfortunately I don't have Ł700 to spend on getting the head gasket checked out, especially considering the car has done 125,000 miles and I'm a broke student who commutes to uni.
Is it worth getting the water pump changed? Or shall I just get the head gasket seen to?