i have a vauxhall arena van r reg 2.3 ltr (think its 2.3) when fillin it up with water its just leakin out i,ve been told its a popped core plug where r they and how many is there?cant see were the leak is due to things in the way,checked all hoses and pipes and they all seem fine,thanks 4 any help

Core plugs are in the block, not sure where on your model.

If you can leave the van for a couple of days then wait for any spills to dry and then slowly and carefully refill the system and see where the leak comes from.

More than likely popped a core plug, they are situated in the block they may be hard to find, I would have thought you may have a couple. Fill it up and try and see where it's flowing from.

IMHO wherever is the hardest most inaccessible point on the block, thats where they are

Probably underneath/behind the manifold

Even behind the flywheel Sorry to cheer you up but they are located in some very awkward places sometimes.

Speaking of strange locations......

You may do better reposting in the general non-locost car chat section...just an idea...