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sprinkles08
sprinkles08, ASE Certified Technician
Category: Infiniti
Satisfied Customers: 21587
Experience:  ASE Master and Advanced level certified. Factory trained with 15 years dealership experience
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04 g35 overheating

Customer Question

04 g35 overheating
Submitted: 28 days ago.
Category: Infiniti
Expert:  david craig replied 28 days ago.

Hi Im David. has any maintenance been done on the vehicle lately/

Expert:  david craig replied 28 days ago.

how high is the temp gauge getting to?

Customer: replied 28 days ago.
I changed the tsta, then the temp sensor. Brought it to infinity they said they found s small leak in the top tank. Changed the radiator. Replaced coolant slowly until it came out of bleeder. Same thing still overheating.
Expert:  david craig replied 28 days ago.

ok. so you replaced the t stat and sensor because it was overheating?

Customer: replied 28 days ago.
Expert:  david craig replied 28 days ago.

was the t stat radiator hose not getting hot? was the temp sensor failing its resistance test?

Customer: replied 28 days ago.
Temp sensor resistance was ok. Just changed it because I had one.
Customer: replied 28 days ago.
I have not checked if the heater is working.
Expert:  david craig replied 28 days ago.

did you do a pressure test on the cooling system?

Customer: replied 28 days ago.
it had a very small leak at the top tank on the radiator so I changed it
Expert:  david craig replied 28 days ago.

ok. and you bled all the air out i see. are you losing coolant also?

Expert:  david craig replied 28 days ago.

internally maybe?

Customer: replied 28 days ago.
No I never saw a leak. Only whenI pressure tested.
Expert:  david craig replied 28 days ago.

so you're not losing coolant, all air is bled, t stat and sensor id replaced along with the radiator. does this have a pressurized reservoir or does the radiator have its own cap?

Customer: replied 28 days ago.
I don't see any indication on the exhaust. If air is trapped I don't see how it would not circulate to the radiator eventuall
Customer: replied 28 days ago.
Radiator has cap
Expert:  david craig replied 28 days ago.

did the new radiator come with a new cap?

Customer: replied 28 days ago.
I put a new one.
Customer: replied 28 days ago.
Can you run this car without a tstat just to diagnose??
Expert:  david craig replied 28 days ago.

yes you can..... but i was going to say check for air again and bleed it again.

Customer: replied 28 days ago.
Ok do you need to lift the front end
Expert:  david craig replied 28 days ago.

no and the most common cause of over heating is either the cooling fans are not coming on, or the coolant system is not bleed properly

Expert:  david craig replied 28 days ago.

ive done it both ways. so whatever suits you.

Customer: replied 28 days ago.
I will try bleeding it again tomorrow. I will let you know. I do remember that when it was hot I tried to turn the heater on for more cooling capacity and the heater did not get hot. Does that indicate air in the system
Customer: replied 28 days ago.
Should you turn on the heater to circulate coolant thru the hater core
Expert:  david craig replied 28 days ago.

yep. not a bad idea at all.

Expert:  david craig replied 26 days ago.

hows it going?

Expert:  david craig replied 25 days ago.

hello????????

Expert:  david craig replied 24 days ago.

still need assistance???

Expert:  sprinkles08 replied 22 days ago.

Hello and welcome to JustAnswer!

there are many possible causes for overheating but you do need to start by making sure that it's bled properly, it looks like it may not have been. After filling the system with the bleeder open then the engine needs to be ran to operating temperature with the radiator cap off until the heat is working correctly at idle, the engine is at operating temperature, the coolant level is stable and no more air comes up. This will take 20 minutes or so from a cold start in a warm environment, longer if outside and cold. Has it yet been bled this way?