Seems I have a small coolant leak, thinks it looks like water pump... how can i check how much coolant has been lost ? need to top up and get in to be repaired.

Andy I had one fail a few years ago. It used to loose water overnight. When it was hot the failing seal in the waterpump was ok, but as it cooled in the evening - or when it wasn't being used, it leaked water. I wasn't sure how long it would last so I kept running it for about 4 months untill it let go big-time. And as you can guess it was on a motorway in very heavy traffic - and in southern France.

 

What I had to do was carry water bottles and as soon as the temp started to rise, stop the car and refill it. It got home ok and a replacement waterpump £54 I think, did the job.

 

It is a long job too and you'll need a set of long reach allen keys.

 

Good luck

 

Jack.

 

...in answer to your question, just top it up each time you use it via the rad cap.