Question about 2003 Nissan Altima

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How do I remove an air lock in the cooling system of a 2003 Altima?

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Remove the top rad hose, raise it above the engine, the Altima's are a pain to add coolant to when emptied, run the car and keep adding coolant make sure the heater is on high. It takes a good 30 minutes.

Posted on Dec 30, 2010

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Why does my nissan altima 2005 not blowing hot air unless it runs over 1500 RPM 3.5 lt motor rad is clean also heater core is clean if it runs done the rd at over 1500 RPM lots of heat

take it to a radiator specialist shop as it indicates that there is an air lock in the cooling system that needs to be removed so that full coolant flow can be achieved

Dec 30, 2016 | 2005 Nissan Altima

1 Answer

How to check to see if radiator fans are functioning

With the engine running, turn on the Air Condition system. This will usually turn the cooling fans on most vehicles.

Nov 03, 2013 | 2003 Nissan Altima

1 Answer

Any diagrams avaialable to show 2001 altima thermostat

see pic below.


  1. Drain the cooling system.
  2. Disconnect the negative battery cable.
  3. To complete removal, refer to illustration.
  4. To install, reverse removal procedure.
  5. Install thermostat with jiggle valve or air bleeder at upper side.
  6. Apply a continuous bead of liquid gasket to mating surface of water inlet.
  7. After installation, fill the cooling system and run engine for a few minutes. Check for leaks.

Please see my tip at . These are genericinstructions. If you get stuck or need specific instructions for your car,please get back to me

Sep 04, 2011 | 2001 Nissan Altima

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My 2003 Nissan Altima makes a waired raddaling noise only when i turn on my air condition or defrost on. What is it that i need to fix. I'm guessing my cooling system needs to be flushed or it's something...

sounds like the clutch on the compressor to me and they are not sold seperatly so you are looking at about $600, sorry to be the one with bad news.

May 06, 2010 | 2003 Nissan Altima

1 Answer

I have a nissan altima 2003, when I turn on the heat, I only get heat when the car is in motion, if I am at a stand still the air turns cold

Check to see if when you are at a standstill the cooling fans are running all the time. It also could be that the water pump has a issue and pumping enough when idling.

Dec 05, 2009 | 2003 Nissan Altima

1 Answer

2005 Nissan Altima 3.5 no heat after changing cooling fluid. Is there a bolt to remove to burp the system

You may need to loosen a hose at the engine or the highest point and bleed the air out, no bleeder on this engine.

Nov 16, 2009 | 2005 Nissan Altima

1 Answer

After driving my impala 20 to 30 miles while cool outside the radiator is boiling rapidly but temp gauge shows ok temp

you may have an air lock in the cooling system, with the radiator cool remove the cap, start the car with the heater on high, let it reach operating temp, fill with water antifreeze \

Sep 27, 2009 | 2003 Chevrolet Impala

3 Answers

Overheating engine

You have gone through a lot of trouble so far replacing parts. I wouldn't rely on rad additives for a fix sometimes they do more harm than good. You could just have an air lock in the coolant system. Did you try running the vehicle without the rad cap for awhile to release any air locks that may have occurred? Have you tried a new rad cap? Hopefully this advise helps you some what.

Jul 28, 2009 | 2002 Nissan Altima

2 Answers

Nissan Altima no cool air blowing or hot air blowing

It appears we have an Air lock scenario and you will need to perform a system Bleed.
Park the vehicle on level ground, when cold remove coolant filler cap, start engine and leave to idle, turn heater on full and blower to max. When engine reaches operating temperature watch and listen near coolant filler, keep clear as gurgling and hopefully a boil over should occur. Top up with very warm coolant and wait as it may do it again.
Check for heat inside vehicle if warm replace coolant cap but keep an eye on temperature gauge as the ~Air lock may have moved on from heater matrix/core so proceedure needs to be carried out again from COLD.

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Feb 24, 2009 | 2002 Nissan Altima

1 Answer

2002 nissan altima - doesn't have any heat

nissan altima notorious for air pockets in cooling system , bleed system well , make sure cooling system is topped off and retry , cheers .

Jan 12, 2009 | 2002 Nissan Altima

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