perhaps some of the joins are leaking?? its pretty coroded so I can't tighten up the clips grr the one I am fitting is like this http://www.paddockspares.com/esr3296-bottom-hose-300tdi.html?gclid=EAIaIQobChMIxpGwh_zu2gIVz7vtCh0W_g1lEAQYASABEgLbe_D_BwE
BTW can I reuse the coolant ? its getting...