hi guys just looking for some advise.
got a vectra 3.0 v6 cdti, was told suspected head gasket, ive since been home and had it running. not had chance to drive it down road as no insurance on it yet.
i noticed that the temp gauge isnt working.
but after a while of idling and engine upto temp, little symbol pops up on dash, to say coolant is low.
looking at the bottle looks as if systems empty, as soon as expansion cap is undone get a whoosh type noise and then coolant rises back to normal level. (hope that makes sense hard to describe it)
ive had a combustion leak test device on there and have run the test for times, but it the fluid didnt change colour which means theres no exhaust gases surly?
anyway on rev up in neutral get a puff of smoke but seems fine, doesnt seem to have any moisture coming out.
am going to get it hooked up to diagnostics at the weekend, as i am hoping its not a headgasket, with no gases and coolant not going anywhere.
i am wondering if anyone has any ideas what it could be?