Nissan Sentra 2001 GXE 1.8L 4dr.
The temparature guage stays around and above 75% (130 degrees) and heater blows cold air. Once in a while (irregularly) when driving, the temperature guage comes down to 50% and heater blows warm air. Usually when engine is idling or break is pressed down, the temparature guage goes high and heater blows cold air. When the gas is pressed hard, it may start to circulate radiator fluid to the heater core or engine and temperature guage may come down and hot air blows.
Tharmostat and battery has been replaced. Radiator fluid flushed few times. Electric connections has been checked. Radiator fan comes on when needed.
The radiator fluid level is constant(no loss of coolant). There is no leak found in the cooling system. Heat Blower fan is good. The water pump is spinning even when in idle.
Please help!
2007-11-03 08:34:43 · 6 answers · asked by I-Slam 1 in Cars & Transportation ➔ Maintenance & Repairs
waterpump is gone, having the same problem myself
2007-11-03 08:45:59 · answer #1 · answered by ? 4 · 1⤊ 0⤋
Nissan Sentra 2001 Gxe
2016-10-31 12:10:16 · answer #2 · answered by Anonymous · 0⤊ 0⤋
I have read over this 4 times and something is wrong! Your Temp Gauge at 75% is over 200 Degrees, 50% is around 175 Degrees. Thermostat in the engine should be 175 to 185 Degrees! "Is the Thermostat Install Backwards? it Happens!
Sounds like the "Impeller" in the Water Pump isn't turning, Pump Shaft is turning but the impeller is Slipping on the Shaft.
"Heater is Warm When Engine is Cool and Cold When Engine is Hot??"
Radiator Clean & Fins (80%) Straight for Good Air Flow?
Coolant Mix Should by 50-50 Clean Water & Anti-Freeze?
Are a/c and Engine Fans Both Working as they should?
NOTE; Good Radiator Shop!!
2007-11-03 21:45:02 · answer #3 · answered by sidecar0 6 · 0⤊ 0⤋
The cooling system is either air bound, meaning there is air trapped in side and not allowing proper fluid flow of you have hydrocarbons escaping in to the coolant system througha head gasket, make sure the system is bled properly and take it to a shop to see if there are hydrocarbons in the system, a dead giveaway is alot of pressure in the system, check the upper coolant hose after it has been running for a bit, if the hose is rock hard and you cannot squeeze it easily you have too much pressure, make sure the raiator is full and last but not least the water pump may not be circulating the coolant efficiantly.
2007-11-03 08:43:06 · answer #4 · answered by Volvo-Guru 3 · 1⤊ 0⤋
I have a 2001 Nissan sentra GXE, 1.8, changed water pump and thermostat, and it TRIED to blow out hot air, but then it went back to cold air again after I drove it...heated up on the hwy...I can drive around town for a while and it stays at the right temp...though it blows out cold air through the heater...but if I go on the hwy, it starts to go up...but if I stop the car (I don't have to turn it off, just slow it down or stop it) it'll go back down...so far that's happened twice since the new thermostat and new water pump
2014-11-06 10:12:04 · answer #5 · answered by Anonymous · 0⤊ 0⤋
Low coolant level.
2007-11-03 08:45:37 · answer #6 · answered by Mr. KnowItAll 7 · 0⤊ 1⤋