Hi Scotty, Greetings from down under Australia. I have a 1994 J30 Nissan Maxima that developed an…

Ron Allan

Hi Scotty, Greetings from down under Australia. I have a 1994 J30 Nissan Maxima that developed an erratic idle and was stalling. After consulting the error codes my mechanic replaced the idle air control valve (IACV) which is the step motor type which has coolant flowing through it. They also replaced the thermostat which was stuck. My mechanic then informed me that there was now a coolant flow issue in the cooling system as the thermo fans were staying on too long. I was also informed the heater core was also blocked. I was then informed after further investigation that hydrocarbons were found in the head gasket and that it had blown because the system could not be bled properly. I had recently driven from Queensland to Victoria 2500km with no issue. Can you make sense of how this may have all unfolded as i have never overheated the car, never had any overheating issues prevuously. My mechanic said that cars can develop issues after everything is flowimg again if it has not been flowing properly in the past. I am disappointed i will have the scrap this car as it is npt economical to change the head gasket on a car such as this.