Thanks neily. The car had a head gasket replaced under warranty in May last year. But I have had trouble since. Leaking hose,possible duff thermostat, split hose and pinhole in another hose four hoses replaced, failure of water pump and then radiator blocked. So the cause of the overheating was due to coolant loss. The garage says that oil in the hoses leads to softening (they are probably all as old as the car)
Yes I have studied the recommended method. I have also been parking the car on a slope - bonnet higher and each time I use it I try to bleed some more air out. There is always a little coming out. Since the coolant is still under pressure after leaving the car for 12 hours it does seem as if air or exhaust fumes are entering the coolant system again.
Hi Since the coolant is pressurised even after leaving the car for over 12 hours why would I suspect the expansion tank cap? Are you thinking it might not be opening to let pressure out? Sniff test? Yes the garage did it last time, not so long ago, and I had a bill so I could save myself some money a buy a kit myself
Second on the cap. Is it using any water still?
No its not using any water.
Thanks I have bought a new cap today.Change the cap, they're only about £5
If it starts using water when you change that, then like I said earlier, put a bottle under the vent pipe and check it regularly.
thanks for that infoTwo vents under cap Geoff ! 1 vents out when hot, 1 vents in when cooling down !
Maybe on other vehicles... the D2's tank cap has only one pressure release valve which should open at 1.4 bar. The sniff test on diesels can be irrelevant in some casesTwo vents under cap Geoff ! 1 vents out when hot, 1 vents in when cooling down !
