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2007 Infiniti M35 Engine Overheating

Tiny
BIGBOICOLLIER
  • MEMBER
  • 2007 INFINITI M35
  • 3.5L
  • V6
  • RWD
  • AUTOMATIC
  • 105,000 MILES
I brought my car to the dealer a couple of days ago, they stated my radiator was shot and my thermostat was done. The next day it suddenly starts to overheat, like they done something. I went ahead and installed a new thermostat, yet it is still overheating. The upper hose on the radiator is so hot while the lower hose is cool to the touch. Is there a possibility the thermostat installed was done improperly? Please respond back when you get the chance.
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Sunday, December 21st, 2014 AT 2:38 PM

10 Replies

Tiny
WRENCHTECH
  • MECHANIC
  • 20,761 POSTS
What did you bring the car to the dealer for in the first place?

What did they say was the problem with the radiator?
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Sunday, December 21st, 2014 AT 3:35 PM
Tiny
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I originally brought it in for heater issues. The heater will work momentarily then stop 15 minutes later. Only cold air will blow. I cannot remember what they said was the cause of the heater semi-working, but I believe they said it had to do with my thermostat being faulty. They also said my radiator had a rack. After I brought my car back home, I took a closer look. There was coolant residue all over that radiator. I could not pin point where the actual leak was.
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Sunday, December 21st, 2014 AT 3:58 PM
Tiny
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OK, that makes complete sense. The reason you had no heat is because the coolant was so low there was nothing but air in the heater core and a leaking radiator would make sense as the cause.
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Sunday, December 21st, 2014 AT 4:06 PM
Tiny
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Still. My question is still up in the air. If this radiator leakage has been there awhile. And I just filled it with new coolant. Why is it not taking? The upper hose is very hot and the lower hose is cool to the touch. The thermostat is brand new and just installed today. However coolant is not going through.
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Sunday, December 21st, 2014 AT 6:37 PM
Tiny
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  • MECHANIC
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You could have messed up the thermostat but my guess is there is still air in the system. Either way yoy can't continue to drive it with a bad radiator. It has to be changed.
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Sunday, December 21st, 2014 AT 6:41 PM
Tiny
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I surly doubt I messed up the thermostat. Three bolts and two hoses is the easiest set up. But you did strike up an interest with saying "air in the cooling system". Is there a way to bleed/prime the cooling system; as you would do for a hydraulic system?
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Sunday, December 21st, 2014 AT 6:54 PM
Tiny
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We use vacuum to do that.
It's a tool called an "air lift"
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Sunday, December 21st, 2014 AT 6:57 PM
Tiny
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Is there any visual instructions on how to use an air lift? Where does it hook up too? I would imagine it to be somewhere along the lower hose.
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Sunday, December 21st, 2014 AT 8:03 PM
Tiny
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It hooks right up to the filler cap and puts the whole cooling system under vacuum and then draws coolant through that source.

http://www.tooltopia.com/uview-550000.aspx?utm_source=google&utm_medium=cpc&utm_campaign=paid_search_google_pla&scid=scplp6842336&gclid=CMC4ws2z2cICFYtr7AodBBUAqw

https://www.2carpros.com/images/external/UVU550000.jpg
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Monday, December 22nd, 2014 AT 2:08 AM
Tiny
ONE984
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  • 1 POST
There is a bleeder screw for the cooling system. It is near the firewall on the passenger side near the battery.
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Tuesday, December 3rd, 2019 AT 12:48 PM

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