As Above, does the VRS / cuna engine still have core plugs?

I remember once i had a kit car with a pinto engine in it, it came to me just b4 december and only had water in cooling system from previous owner.

Anyway went out one day to work on it, it had been freezing and i noticed fluid resevoir was empty.

After a lot of hunting around i eventually found these core plugs had been blown out.

 

So wondering if this is something thats still on a modern engine.

 

Reason Im asking is that my Rescue VRS has just had its new rad pack fitted and new coolant, ran fine for ages staying cool, and kept temp at 90 when had been running for ages.

But coolant level had dropped the next day I looked at it,

Its done this twice, no visible leaks from any pipes fitted to the new Pack.

 

Also No apparent Milkshake, as i initially panicked that cylinder head might have gone.

 

Mate of mine reckoned that his OCT did a similar thing, losing coolant slowly at 1st then got worse and he claims water pump was at fault?

 

When i was doing the rad pack and a service, I noticed underneath the oil filter there seemed to be an electric water pump? below oil filter.

Is this only one for the car or a secondary one? anyone else had one go wrong causing coolant loss?

And if this was the case why cant i see a leak.

Ta In advance 

PaulB

Yes it has auxiliary pumps, main 1 is at the front & belt driven as usual.

Thanks 4 reply, had a feeling it wouldn't be main one/ only one.