Join Date: Jul 2005
Location: Toronto, Ontario, Canada
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The no heat problem is likely just air in the system. Have your cooling system fully flushed and filled with new coolant, and then perform the bleeding procedure (very important - get a service manual and follow the instructions exactly).
The using oil and check engine light may be related. You need to go to an Autozone or something and have your code read. Let us know what the code is. If you have a 2.5, it might be a bad precat or something like that, and will end up destroying your engine (damage may have already been done, as indicated by the oil burning).
'05 Altima 3.5 SE 5-spd M/T Smoke