Question about 1994 Nissan Sentra 4-Door

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How to bleed the coolant system on a nissan 2003 sentra. Overheating and heater will blow cold air after a km of driving and when making a right turn the guege will indicate overheating and goes back

If I remove the thermostst and drive the 2003 nissan sentra , I will get heat from the heatercore and it will not over heat the only thing is that the heat will level will drop at certain times becaose, i guess that the coolant is flowing constantly without any shut off to get very hot

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  • Nissan Master
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I recently tried the DIY service and repair manuals from a website and it actually helped me repair transmission problem in my jcb 3cx site-master. It would'nt move forward or reverse, engine was good both solenoids for forward and reverse worked, but still couldn't diagnose the problem.
I don't have much technical knowledge but I just followed it step-wise, and now it works perfect! covers wiring, codes, diagrams, torque specs, PCV, everything
got it from www.reliable-store.com

Posted on Mar 22, 2018

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Posted on Jan 02, 2017

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SOURCE: heater blowing cold air

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!

Posted on Oct 16, 2009

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SOURCE: heater blowing cold air

My 05 sentra with 79k miles heat will warm up and then get cold after a mile of driving, we have tried to get the air pocket out, the mechanic stated he thought it could be a blown head gasket, another mechanic said it was a bad heater core. Any advice would be appreciated.

Posted on Dec 05, 2009

alicantecoli
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SOURCE: 2003 nissan sentra gxe 1.8

only one thing will cause this problem and thats the head gasket ,its pressurising ,no heat either as water is being blown out ,sorry to give the bad news

Posted on Dec 12, 2010

  • 237 Answers

SOURCE: I have a 2001 nissan sentra 1.8 with 158,000

unfortunately these engines are known for this condition and for head gasket failure.with engine cold pressurize cooling system with spark plugs removed.look down into holes with flashlight after about ten minutes.....im betting youll see a puddle of coolant on piston...usually its cyl# 2 or 3.i cant think of any other possibility for system repeatedly airlocking other than a head gasket.good news they are probably one of the easier ones to replace.

Posted on Mar 11, 2011

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How to bleed the coolant system on a nissan 2003 sentra. Overheating and heater will blow cold air after a km of driving and when making a right turn the guege will indicate overheating and goes back


You should check out www.reliable-store.com they have info on repair, service, wiring diagram, electrical diagram, fuse diagram, torque specs, troubleshooting,
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