just fitted a new crank sensor. noticed when i was under the oil filter i could see drips of something yellowish. comming from the top of engine below the skuttle Which was off. Had a horrible burnt smell since the aircon was gassed up. mixture of old oil / and engine felt very hot on that side.
The liquid smelt like gearbox fluid but not pink
Aircon fans not kicking in now at all

checked water level. seemed a bit low just at centre panel of expansion tank. noticed seal on top of lid knackered fitted replacement lid

mark

Someone lifted their bumcheek?

Seriously now....
You need to wash off the engine and then have a looky after a hot run to see where the problem originates.
Get back to us then and maybe someone will know how to help. 

I occasionally have a bad smell on the passenger side, I cure it by asking the Mrs to get out the car

Think its something to do with the cooling chaps 
It dont smell in the car just engine bay. Car seems to run very hot on that side. just done crank sensor because it failed on me. Now the cooling fans arent kicking in see (cooling fans post)

she 's starting to let me down now. 

could be  aircon dont work anymore
although not sure what aircon fliud smells like when its very hot... smells similar to fully synthetic gearbox fliud to me
mark