Can anyone give me an idiots guide to doing this in situ?
Having looked at the manual - it makes the assumption that the engine is out of the car and is being completely dismantled.
For example it says "remove water pump" - is that necessary?

Any info wud be apreciated

IIRC the water pump is on the front of the injun, immediately in front of the timing chain cover - it's almost egg-sack-tly the same as a mini injun in that respeck (only a sight easier to get to, to work on it).

So, yes, it's neccesary, or you won't be able to take the cover off the timing chain Piece of cake to remove the water pump though isn't it? Some bolts to undo, some coolant to replace and a new gasket for when you stick it back togevver.

Cheers,

best remove the front grille and radiator as well.

and take the bonnet off, they have a habit of coming down on yer ead