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Q: Car overheating on 2002 Nissan Altima

I recently had a coolant hose and the thermostat replaced. But my car is still overheating. It is suggested that the Head Gasket may need replacing. Could there be other problems that causing the car to overheat. The car is not leaking oil or discharging smoke.
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Make sure you Check both the upper AND lower thermostats... took mine to an authorized nissan dealer and they didn't even know it had 2 thermostats
Napa has a coolant test kit for about $50 that will test your coolant to see if there is exhaust gases in your coolant, Once this test is done you will know if you have a blown head gasket
Do the radiator fans cycle on/off as the car heats up? If the fans do not run the car will overheat.
Hi everyone,

i had this same problem for months 2006 nissan altima 2.5sl with 170000miles and worried whats the problem is made some diagnostic tests from amco thought that is transmission problem guess what its not transmission. so started with minor repairs like coolant sensor, water pump and even changed thermostats luckily one of my close friend did the repair work for me even though it costed me $300. so i went to nissan dealer for diagnose the problem so they said i have a leakage in my head gasket and hey quoted me for $2323.38 F*** dollars just to repair and replace the parts, i was not shocked bcz we know what dealer quotes looks like. So here are my suggestions for people having this same issue.

1st step take the car to the dealer and make a diagnosis it may cost but we can save time and can know exactly whats the problem is. because i have went to so many mechanics to check whats the problem is and spent lot of money on fuel, wasted time and money.

2nd once you find the problem check with some of the mechanic that you can count on and repair it.

3rd if you want to try before taking the car to diagnosis you can buy the head gasket fix liquid that available in car parts store. i haven't tried but if you want to its up to you guys here is the link

update 07/13/2016

i have tried to take the car for repair . Firstly i have to make sure the head cylinder doesn't have any cracks or bend and the Mechanic asked me to make it checked by the head cylinder repair shop that they will do the pressure test , surface test and the crack test it cost me $100 if i do it by my self like taking to the shop. if every thing goes well we can use the same if not we are end up spending money like i checked the head cylinder itself cost $577 without tax.

hope this helps have a great day :)
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