2001 Nissan Sentra air in the system

2001 NISSAN SENTRA
107,000 MILES • 4 CYL • FWD • AUTOMATIC
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ESTRASZ
  • MEMBER
  • 1 POST
I just replaced the radiator and can't seem to get all of the air out of the system. I tried opening the air relief screw. I also ran the heater and the heat runs hot for a while then turns cool and the engine begins to run hot. I loosened one of the heater core hoses and got some of the air out.
The heat ran hot for a while again but eventually turned cool and then the engine temperature began to rise again. While the heat runs hot the engine temperature stays within the normal range.

I can't seem to get all of the air out to allow the cooling system to work properly
May 23, 2010 at 6:53 PM
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MHPAUTOS
  • ✓ASE Certified Mechanic
  • 31,937 POSTS
  • ASE Certified Mechanic
Hi there,

Back fill the engine with water at the heater hose, ensure that the thermostat has a bleed valve and if not you can drill a small hole in the flange 1/16" is plenty or get a thermostat with a bleed valve, try this.

Mark (mhpautos)
May 24, 2010 at 3:55 AM
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