Nissan Repair: 2005 Nissan Sentra 1.8s Overheating, 2005 nissan sentra, nissan sentra

Question
My 2005 Nissan Sentra 1.8s with 55,000 mi. blows cold air from the heater. Coolant not circulating in engine. Lower hose stays cool to touch. Both heater hoses cold. Changed thermostat - didn't fix it. Coolant not leaking or dirty. None in oil - no oil in radiator. Changed worn water pump belt - pump spins freely with no noise or resistance. Cooling fans come on after warm-up. Temperature gauge stays in normal range then jumps to hot and back again. Coolant good to 10 below - didn't freeze here yet. No other problems or repairs to car. Afraid to drive and make worse. Help!

Answer
Hi Jack -

When you changed the water pump belt, did you check the water pump? If it was spinning too freely, maybe the water pump shaft broke, and it is not pumping water in the system. Especially if the top hose is hot, and lower hose cool.

Let me know -
aloha
calvin

Hi Jack -

Thanks for the update. Hope that solved your problem. I appreciate the feedback.

Happy Thanksgiving to you too!!

calvin