hi im new (noob)

hi i just brought a mk2 range rover 4.0ltr se auto with LPG conversion.
i got it for cheap because one of the core plugs has poped out which obviously made all the water leak out.

is there any advice you could give for repairing it....... i know how to fit it and everhing but just to make sure that i dont miss anything if you know what i mean.

the core plug is the one on the passenger side below the rocker and its just behind the engine mount form what i can see.

any help would be great cheers

dont forget to use a" rimming tip" before pushing it fully home
can be bought from any landy dealers