2002 xtype 2.1 manual
After changing manual gearbox oil, car is not on the road yet couple things left to do, want to change the gearbox oil but I can't drive it on the road , If the engine is left idling will that still heat up the gearbox oil? So that I can drain it more efficiently ? Thanks

 

Only the input shaft will be turning and it will move around some of the oil. Placing a small heater by the trans would heat it up better. Just let it drain overnight.

 

Lots of discussion on the auto transmission oil change, but regarding the manual gearbox...

- Is there a clearance issue getting the hex wrench in to the filler plug (6 speed 2.2D)?
- I assume given a completely unknown history - I should refill using the "fill till it overflows from the filler port" method and forget about how much comes out?
- Since the car will not be parked on a perfectly level surface (and the above point depends on that), my plan is to jack the appropriate corner(s) to achieve a level... but where is "level" on the car? Left to right seems pretty simple with a few options, but what surface or what two points front to back would be considered level?

Thanks,