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poor heat 2005 2.5s Forums > > poor heat 2005 2.5s poor heat 2005 2.5s
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  #1  
Old 01-05-2017, 05:44 PM
Soapmyster Soapmyster is offline
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2005 Altima
2005 Altima
 
Join Date: Oct 2012
Location: Oriskany
Posts: 180
Question poor heat 2005 2.5s

Hi all.
Our 2005 altima 2.5s seems to have poor heat. There is some history on this one as it has not been a new issue. (heater motor works fine)
A year ago the heat was poor. I decided to change the thermostats and coolant.
I used my purging funnel on the radiator and had the front end elevated.
Heat was good and hot. Seemed to be good for the rest of the winter.

Over the summer the radiator went (was leaking at the seam at the top)
Replaced and bled system same way. Heat was great.

Now winter is back again and heat seems poor again. I have to have it on high windshield only just to keep it from icing. If I have it set to defrost/floor it will not keep the snow melted on the windshield.
I was wondering if it could be a headgasket leak that is minor and pushing air into the system over time and getting in the heatercore.
I might add that it has never overheated, or run hot.or ran out of coolant.
Other than this issue the car runs excellent.
If it was I doubt it would fail the by products test because it is not a bad leak.
Maybe you guys could give me some insight.. In the meantime I think I will try and see if I get any air to purge. If it does then it has to be coming from somewhere.
Happy Travels
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  #2  
Old 01-11-2017, 11:07 PM
jcg0324 jcg0324 is offline
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2011 Altima Sedan
2011 Altima 2.5s
 
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reach in after car is warmed up and feel the hose near the firewall going into the heater core and then feel the hose coming out of the heater core. If their is a big difference then you have some blockage in the heater core.
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  #3  
Old 01-12-2017, 04:52 PM
Soapmyster Soapmyster is offline
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Thank you. I will check that
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  #4  
Old 01-12-2017, 11:41 PM
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Jackoloe56 Jackoloe56 is offline
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1998 Altima Sedan
1998 Altima
 
Join Date: Jan 2017
Location: Lansdale, PA
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Default Poor Heat

The Third Generation Altima has a large heater core design. Whenever coolant is changed or added,make sure to use a 60% water/40% ethylene glycol mixture. If you have been doing a 50/50 mixture, the heat transfer through heater core diminishes, thus cooler air felt. Hope this helps.
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  #5  
Old 12-03-2017, 05:18 PM
Deigo Deigo is offline
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2002 Altima Sedan
 
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I have a 2002 Nissan Altima no heat when idleing I change to thermostat flushed the system change the radiator cap pudge the system still no heat and one of the hose from the heater core is cold and one is hot
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  #6  
Old 01-06-2018, 08:15 PM
Soapmyster Soapmyster is offline
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2005 Altima
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sounds to me like the heatercore is plugged.
Remove the hoses from the core and rush water or air through the side that was cold.
Could be clogged with bars leak
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  #7  
Old 01-06-2018, 09:04 PM
Deigo Deigo is offline
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Thank you am going to do that
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