Well the results are as follows, 1 min at idle then 4 minutes at idle. The car was up to temperature as i went for about a 7-8 mile drive.


and then 4 minutes



Looks to me like 1, 2 & 4 have had it. 3 is a nice steady trickle when it leaks back with very few bubbles so i am happy to say that it is ok.