Mini ONE 1.4d: Bubbling from radiator bottle... is it the cylinder head?

 

So today we have a MINI ONE 1.4 diesel and guess what... it's overheating! Coolant is being lost somewhere and we find that it is bubbling out of the header-tank. My first guess in this situation is the head-gasket, but for a cheap fix (possibly, but better than going straight to ripping a friend's car apart) we tried a new radiator / header-tank cap, which was fitted yesterday and, although it has reduced the bubbling problem, there is still some coming out when the engine is warm, coolant lost and the temp. needle creeping up. 

This week the poor running has begun... occasional juddering, drop in revs and the odd misfire noise. Hmm... I have said to keep using it until the running becomes unmanageable (provided it's kept watered and is not overheating of course!) and am hoping for a weekend of better weather so I can have a proper look round it and, if need be, open it up. Watch this space.

EDIT: With not many tell tale signs of the head gasket being blown, someone has kindly suggested that the water pump is failing and not circulating coolant properly, so here's something else to look into. Yay!

E60: Replacing headlight-washer caps / hinges!

Despite how it looks, you can't replace them with the bumper on. This is best done while the whole front bumper is off the car, but thesis the quick and dirty method, of course.

1. Lift each cap out of the bumper on the hinge and remove them by depressing the clips at the back and sliding the lugs out of the hinge.

2. Remove the screw holding each corner of the bumper to the wing using a 10mm wrench.

3. Pop the corner out of the wing and bend it out enough to reach behind the headlight-washer cap.

4. Remove the hinge / lever by bending one side out and unhooking it from the outer lugs, the other side should then come away easily.

5. Remove the spring by squeezing the coils towards each other and unhooking them from the inner lugs.

6. Fit the new spring as a reverse of removal.

7. Lift the spring up forwards and fit the new hinge / lever as a reverse of removal, then release the spring ensuring it is tight against the flat-bar on the hinge.

8. Refit each corner of the bumper.

9. Lift the hinges / levers out of the bumper and fit the caps.