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Jay
Jay, Nissan Technician
Category: Nissan
Satisfied Customers: 18917
Experience:  20+yrs experience with Nissan & Infiniti Trained & Certified.Currently still working for Dealer
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Pathfinder: 2007 pathfinder overheating when at idle, while

Customer Question

2007 pathfinder overheating when at idle, while driving it drops to normal. The raidator was replaced,thermostat as well.Found the plastic connectors to the heater core cracked and leaking so I relpaced those and still it runs hot. Help!!!
Submitted: 1 year ago.
Category: Nissan
Expert:  Jay replied 1 year ago.
Hi, My name is***** happy to help you. During our conversation, I may be presenting you with different things to try, and ask you some Questions to get a better understand of the issue so I can answer your question properly. So stick with me to the end, and I am sure we should be able to get this issue resolved for you!
Did you do the work on your truck yourself? Do you know how the coolant system was bleed?
Let me know..
Customer: replied 1 year ago.
Well i only did the hose connectors yesterday, the mechanics did everything else including the transmission rebuild.
Expert:  Jay replied 1 year ago.
Once you do a Radiator or Thermostat alone, it takes 1/2 hour to a hour to bleed the coolant system. These systems are tricky to bleed. I pinch off a few hoses which helps bleed the coolant system. Failure to do this may result in not properly bleeding the coolant system. If the coolant system is not properly bleed, it leaves air in the system. The air is what is causing the over heating.
So let me explain how to properly bleed the coolant system and what hoses I pinch off.
To bleed the coolant system, remove the radiator cap. Install the coolant bucket ( See Links for images ). Fill the bucket about 1/2 way. Then raise the front of the car as high as if it were on ramps. This way if there is air in the coolant system, the circulation brings it to the highest point. Then turn on the car, and put the heat on speed number 4, recirc mode on, and face mode. You may need to rev the engine a few times to move the coolant around to get the air out. I also turn the engine off a couple times and wait 2 or 3 mins to let the air pocket move and bubble out. In the mean time you want to check your vents to see if your getting heat. After you have good heat, and little to no bubbles in the coolant bucket. Then the coolant system is properly bleed. You should have good heat when bleed properly. So when you put your hand over the vent and hold it there for 30 seconds, you get a slight burning sensation. That is perfect heat
https://dl.dropboxusercontent.com/u/105565483/bleed%20coolant%204%20liter.jpg
https://dl.dropboxusercontent.com/u/105565483/fill%20rad.jpg
https://dl.dropboxusercontent.com/u/105565483/Bleeding%20Coolant%20system.jpg
https://dl.dropboxusercontent.com/u/105565483/fill%20rad%20mona%27s%20car%20bleed%20coolant.jpg
If you don't have a coolant bucket, you can use a funnel the same way.
https://dl.dropboxusercontent.com/u/105565483/Fill%20Rad%20Home%20Job%20Funnel.jpg
Many people make the mistake that after they do all this work that the water pump is bad. Don't make that mistake. The only times I have ever seen water pumps go bad is when they are leaking. If it's not leaking, it's not bad.
If you have any more questions on this, please feel free to ask.
If not, and you're satisfied with my help, please Rate me. I hope I have provided you with Excellent Service.
Thanks Jay!
Customer: replied 1 year ago.
Wow, i will try this today, what antifreeze do you recommend
Expert:  Jay replied 1 year ago.
Use the Green Antifreeze. That is what is designed for your truck.
If you have any more questions on this, please feel free to ask.
Thanks Jay!

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