Well, sometimes (not so often), after turning engine off i can hear strange gurgle sound (gurgle "water" sound ~3 sec). I have max antifreeze (coolant), and all ok with oil, also engine temperature is ok (or looks ok). Any ideas what is it? It is seriouse something? hmm. [2004 350Z]

 

Air trapped in the heater core. Run the engine with eh radiator cap off for about 10 minutes.

 

makes sense, keep us posted. I am changing out my fluids this weekend and wondering about draining all the antifreeze, so you are my ginuea pig.

 

Hmmm, any-way it is seriouse? Possible to drive e.t.c.?
Tomorrow going to try to run the engine with eh radiator cap off for about 10 minutes

 

Well, next problem, if engine started with radiator cap off - coolant/antifreeze, after 10 secs is started to go out cos my Antifreeze/Coolant is full (max).

Not sure what to do, should i visit Nissan service? It is serious problem (if some air in system)? Possible to drive with air in system?

Thanks for help

 

Shouldnt be a problem to drive,,but it may help if you elevate the front of the car to help force the air bubble to the radiator quicker.