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Shop By Brand

The Following brands are available based on your search.

  • AISIN
    AISIN
  • Beck Arnley
    Beck Arnley
  • Behr
    Behr
  • Gates
    Gates
  • Kuzeh
    Kuzeh
  • Stant
    Stant

Shop for Top Selling Genuine Nissan Sentra Thermostats

  • We Stock the following top leading brands, including Stant, Gates, AISIN, Kuzeh
  • Constantly Updated Inventory of Nissan Sentra Replacement Thermostat Parts

We also have Thermostat parts for other Nissan models, including 300ZX, 350Z, 370Z, Altima, Armada, D21, Frontier, Maxima, Murano, Pathfinder, Pickup, Quest, Rogue, Sentra, Titan, Versa, Versa Note, Xterra.

Stant
1987 Nissan Sentra Engine Coolant Thermostat 4 Cyl 1.7L Stant - OE Type Thermostat

P311-0294541    13968  New

33748 , 5012-80 , 1430717 , 422180 , 143-0717 , 322-180 , 32148 , 422-180 , 32149 , 103 , 8943324661 , 322180

Qty:
$8.71
Stant Engine Coolant Thermostat
  • Stant OE Type Thermostat
  • Temperature 180 Degrees OE Temperature
  • OE Type Thermostat
  • Product Attributes:
    • Bypass Plate Diameter (in): 1.092
    • Flange Diameter (With Seal) (in): N/a
    • Flange Diameter (Without Seal) (in): 2.125
    • Height from Flange to Top of Bridge (in): 0.78
    • Temperature (F): 180 Degrees
  • Original equipment design. Made of durable material for a long lasting life. Stainless steel assembly engineered for a smooth performance.
Brand: Stant
Additional Fitment Information:
Vehicle Block Engine CID CC
1987 - Nissan Sentra L 4 Cyl 1.7L - 1688
Stant
1987 Nissan Sentra Engine Coolant Thermostat 4 Cyl 1.7L Stant - OE Type Thermostat

P311-223CEAC    13967  New

467170 , 3 , 212000C810 , 2120040F00 , 467-170 , 367-170 , 395-170 , 32148 , 1430710 , 367170 , 810-170 , 381-170 , 710170 , 395170 , 810170 , 2028-170 , 2120053J00 , 1430717 , 710-170 , 143-0717 , 32337 , 2120053J10 , 33747 , 03

Qty:
$8.90
Stant Engine Coolant Thermostat
  • Stant OE Type Thermostat
  • Temperature 170 Degrees Alternate Temperature
  • OE Type Thermostat
  • Product Attributes:
    • Bypass Plate Diameter (in): 1.092
    • Flange Diameter (With Seal) (in): N/a
    • Flange Diameter (Without Seal) (in): 2.125
    • Height from Flange to Top of Bridge (in): 0.78
    • Temperature (F): 170 Degrees
  • Original equipment design. Made of durable material for a long lasting life. Stainless steel assembly engineered for a smooth performance.
Brand: Stant
Additional Fitment Information:
Vehicle Block Engine CID CC
1987 - Nissan Sentra L 4 Cyl 1.7L - 1688
Stant
2001 Nissan Sentra Engine Coolant Thermostat 4 Cyl 2.0L Stant - OE Type Thermostat

P311-223CEAC    13967  New

467170 , 3 , 212000C810 , 2120040F00 , 467-170 , 367-170 , 395-170 , 32148 , 1430710 , 367170 , 810-170 , 381-170 , 710170 , 395170 , 810170 , 2028-170 , 2120053J00 , 1430717 , 710-170 , 143-0717 , 32337 , 2120053J10 , 33747 , 03

Qty:
$8.90
Stant Engine Coolant Thermostat
  • Stant OE Type Thermostat
  • Temperature 170 Degrees Gasket not required, use silicone; OE Temperature
  • OE Type Thermostat
  • Product Attributes:
    • Bypass Plate Diameter (in): 1.092
    • Flange Diameter (With Seal) (in): N/a
    • Flange Diameter (Without Seal) (in): 2.125
    • Height from Flange to Top of Bridge (in): 0.78
    • Temperature (F): 170 Degrees
  • Original equipment design. Made of durable material for a long lasting life. Stainless steel assembly engineered for a smooth performance.
Brand: Stant
Additional Fitment Information:
Vehicle Block Engine CID CC
2001 - Nissan Sentra L 4 Cyl 2.0L 122 1998
Stant
2001 Nissan Sentra Engine Coolant Thermostat 4 Cyl 2.0L Stant - OE Type Thermostat

P311-0294541    13968  New

33748 , 5012-80 , 1430717 , 422180 , 143-0717 , 322-180 , 32148 , 422-180 , 32149 , 103 , 8943324661 , 322180

Qty:
$8.71
Stant Engine Coolant Thermostat
  • Stant OE Type Thermostat
  • Temperature 180 Degrees Gasket not required, use silicone; Alternate Temperature
  • OE Type Thermostat
  • Product Attributes:
    • Bypass Plate Diameter (in): 1.092
    • Flange Diameter (With Seal) (in): N/a
    • Flange Diameter (Without Seal) (in): 2.125
    • Height from Flange to Top of Bridge (in): 0.78
    • Temperature (F): 180 Degrees
  • Original equipment design. Made of durable material for a long lasting life. Stainless steel assembly engineered for a smooth performance.
Brand: Stant
Additional Fitment Information:
Vehicle Block Engine CID CC
2001 - Nissan Sentra L 4 Cyl 2.0L 122 1998
Stant
1999 Nissan Sentra Engine Coolant Thermostat 4 Cyl 1.6L Stant - Superstat ® Thermostat

P311-203F938    45758  New

2014-180 , 9091603109 , 60928 , 541080 , 33708S , 90916-03109

Qty:
$11.51
Stant Engine Coolant Thermostat
  • Superstat ® Premium Thermostat
  • Temperature 180 Degrees Gasket not required, use silicone; OE Temperature
  • Superstat ® Thermostat
  • Product Attributes:
    • Bypass Plate Diameter (in): 1.092
    • Flange Diameter (With Seal) (in): N/a
    • Flange Diameter (Without Seal) (in): 1.885
    • Temperature (F): 180 Degrees
  • Premium Superstat thermostat. Uses high venturi for maximum cooling capacity during high temperature, high load oepration. 25% larger piston in diameter that delivers 1 1/2 the power of standard thermostats. Stanless steel flange is burnished to a bright finish for stress relief and added corrosion resistance. Thicker flange.
Brand: Stant
Additional Fitment Information:
Vehicle Block Engine CID CC
1999 - Nissan Sentra L 4 Cyl 1.6L 97 1597
Stant
1999 Nissan Sentra Engine Coolant Thermostat 4 Cyl 1.6L Stant - OE Type Thermostat

P311-3AA2ED5    13758  New

L339113 , 644-360 , 15758 , 3758 , 214-180 , 471-180 , 33708 , 131110 , 131109 , ET-29-180 , 484580 , 94859163 , 2458613 , 86201782 , 2817482 , 1430654 , E3HN8575AA , 675HT , 471180 , 90916-03046 , 7214-180 , 132-49 , 12302516 , 9091603069 , L33-9193 , 13249 , 761-180 , 131-558 , L33-9113 , 131558 , 1661 , L339193 , 2083-180 , AT 156 , 4074182 , ET29180 , 94840251 , 7214-180JV , 143-0654 , 14-180 , 9091603060 , RT-373 , D8NN8575FB , 4074 182 , 2120077A63 , 9091603046 , 8620-1782 , 2120077A60 , 909160304673 , RT373 , 31928 , 131-110 , 2120077A61 , 2120077A00 , 811-170 , 7779754 , 70998113 , RT366 , 644360 , 351 , 371180 , 28-17482 , 7214180 , 811170 , RT-366 , 761180 , 3058 , 7239-180 , DVN-47H , 56-00481 , 90916-03046-73 , 94856516 , 90916-03090 , DVN47H , 83145 , W57-103 , E6HZ8575A , 5600481 , W57103 , 156 , 94844616 , W156 , 2083180 , 214-180JV , 371-180 , 94844416 , 644351 , 14180 , AT156 , 21200-77A60 , 9091603090 , 7239180 , 131-109 , 75039

Qty:
$7.47
Stant Engine Coolant Thermostat
  • Stant OE Type Thermostat
  • Temperature 180 Degrees Gasket not required, use silicone; OE Temperature
  • OE Type Thermostat
  • Product Attributes:
    • Bypass Plate Diameter (in): 1.09
    • Flange Diameter (With Seal) (in): N/a
    • Flange Diameter (Without Seal) (in): 1.885
    • Height from Flange to Top of Bridge (in): 0.78
    • Temperature (F): 180 Degrees
  • Original equipment design. Made of durable material for a long lasting life. Stainless steel assembly engineered for a smooth performance.
Brand: Stant
Additional Fitment Information:
Vehicle Block Engine CID CC
1999 - Nissan Sentra L 4 Cyl 1.6L 97 1597
Stant
2012 Nissan Sentra Engine Coolant Thermostat - Upper 4 Cyl 2.5L Stant - OE Type Thermostat

P311-581BD02    15112  New

21230EL00B , 21230EL01B , 21230EL00A , 212306N20A , 34160 , 21230-EL00A , 212303RC0A , 212306N200 , 21230-8P300 , 7457-205 , 457-205 , 212303RC1A , 31641 , 455192 , 212308P300

Qty:
$8.03
Stant Engine Coolant Thermostat  Upper
  • Stant OE Type Thermostat
  • Temperature 205 Degrees With Seal Included OE Temperature This part is also available in the Engine Coolant Thermostat Kit 114KT, which contains 10227 (Radiator Cap), 14678 (Engine Coolant Thermostat) and 74000 (Engine Coolant Temperature Sensor)
  • OE Type Thermostat
  • Product Attributes:
    • Bypass Plate Diameter (in): N/a
    • Flange Diameter (With Seal) (in): 2.21
    • Flange Diameter (Without Seal) (in): 2.04
    • Height from Flange to Bottom (in): 0.82
    • Height from Flange to Top of Bridge (in): 0.78
    • Temperature (F): 205 Degrees
  • Original equipment design. Made of durable material for a long lasting life. Stainless steel assembly engineered for a smooth performance.
Brand: Stant
Position: Upper
Additional Fitment Information:
Vehicle Position Block Engine CID CC
2012 - Nissan Sentra Upper L 4 Cyl 2.5L 152 2488
Stant
2012 Nissan Sentra Engine Coolant Thermostat - Lower 4 Cyl 2.5L Stant - OE Type Thermostat

P311-3784A60    14678  New

1430824 , 1430833 , 427-180 , 395180 , 31548 , TX14582D , 1430818 , 22006N20 , 21200-6N210 , 33941 , 426-180 , 21200-EA000 , 212006N210 , 21200EA000

Qty:
$12.85
Stant Engine Coolant Thermostat  Lower
  • Stant OE Type Thermostat
  • Temperature 180 Degrees With Seal Included OE Temperature This part is also available in the Engine Coolant Thermostat Kit 114KT, which contains 10227 (Radiator Cap), 15112 (Engine Coolant Thermostat) and 74000 (Engine Coolant Temperature Sensor)
  • OE Type Thermostat
  • Product Attributes:
    • Bypass Plate Diameter (in): 1.1
    • Flange Diameter (With Seal) (in): 2.3
    • Flange Diameter (Without Seal) (in): 2.15
    • Height from Flange to Top of Bridge (in): 0.74
    • Temperature (F): 180 Degrees
  • Original equipment design. Made of durable material for a long lasting life. Stainless steel assembly engineered for a smooth performance.
Brand: Stant
Position: Lower
Additional Fitment Information:
Vehicle Position Block Engine CID CC
2012 - Nissan Sentra Lower L 4 Cyl 2.5L 152 2488
Stant
2013 Nissan Sentra Engine Coolant Thermostat - Upper 4 Cyl 1.8L Stant - OE Type Thermostat

P311-581BD02    15112  New

21230EL00B , 21230EL01B , 21230EL00A , 212306N20A , 34160 , 21230-EL00A , 212303RC0A , 212306N200 , 21230-8P300 , 7457-205 , 457-205 , 212303RC1A , 31641 , 455192 , 212308P300

Qty:
$8.03
Stant Engine Coolant Thermostat  Upper
  • Stant OE Type Thermostat
  • Temperature 205 Degrees With Seal Included OE Temperature
  • OE Type Thermostat
  • Product Attributes:
    • Bypass Plate Diameter (in): N/a
    • Flange Diameter (With Seal) (in): 2.21
    • Flange Diameter (Without Seal) (in): 2.04
    • Height from Flange to Bottom (in): 0.82
    • Height from Flange to Top of Bridge (in): 0.78
    • Temperature (F): 205 Degrees
  • Original equipment design. Made of durable material for a long lasting life. Stainless steel assembly engineered for a smooth performance.
Brand: Stant
Position: Upper
Additional Fitment Information:
Vehicle Position Block Engine CID CC
2013 - Nissan Sentra Upper L 4 Cyl 1.8L 110 1798
Stant
2006 Nissan Sentra Engine Coolant Thermostat 4 Cyl 1.8L Stant - OE Type Thermostat

P311-4316004    14707  New

7441-170 , 21200-6M43A , 212006M400 , 212004Z010 , 21200-6M400 , 441-170 , 31577 , 396170 , 33944 , 212006M43A , 212004Z000

Qty:
$12.83
Stant Engine Coolant Thermostat
  • Stant OE Type Thermostat
  • Temperature 170 Degrees With Seal Included OE Temperature
  • OE Type Thermostat
  • Product Attributes:
    • Flange Diameter (With Seal) (in): 2.05
    • Flange Diameter (Without Seal) (in): 1.89
    • Height from Flange to Bottom (in): 1.4
    • Height from Flange to Top of Bridge (in): 0.7
    • Temperature (F): 170 Degrees
  • Original equipment design. Made of durable material for a long lasting life. Stainless steel assembly engineered for a smooth performance.
Brand: Stant
Additional Fitment Information:
Vehicle Block Engine CID CC
2006 - Nissan Sentra L 4 Cyl 1.8L - 1769
Stant
2016 Nissan Sentra Engine Coolant Thermostat 4 Cyl 1.8L Stant - OE Type Thermostat

P311-581BD02    15112  New

21230EL00B , 21230EL01B , 21230EL00A , 212306N20A , 34160 , 21230-EL00A , 212303RC0A , 212306N200 , 21230-8P300 , 7457-205 , 457-205 , 212303RC1A , 31641 , 455192 , 212308P300

Qty:
$8.03
Stant Engine Coolant Thermostat
  • Stant OE Type Thermostat
  • Temperature 205 Degrees With Seal Included
  • OE Type Thermostat
  • Product Attributes:
    • Bypass Plate Diameter (in): N/a
    • Flange Diameter (With Seal) (in): 2.21
    • Flange Diameter (Without Seal) (in): 2.04
    • Height from Flange to Bottom (in): 0.82
    • Height from Flange to Top of Bridge (in): 0.78
    • Temperature (F): 205 Degrees
  • Original equipment design. Made of durable material for a long lasting life. Stainless steel assembly engineered for a smooth performance.
Brand: Stant
Additional Fitment Information:
Vehicle Block Engine CID CC
2016 - Nissan Sentra L 4 Cyl 1.8L 110 1798
Stant
2012 Nissan Sentra Engine Coolant Thermostat - Upper 4 Cyl 2.0L Stant - OE Type Thermostat

P311-581BD02    15112  New

21230EL00B , 21230EL01B , 21230EL00A , 212306N20A , 34160 , 21230-EL00A , 212303RC0A , 212306N200 , 21230-8P300 , 7457-205 , 457-205 , 212303RC1A , 31641 , 455192 , 212308P300

Qty:
$8.03
Stant Engine Coolant Thermostat  Upper
  • Stant OE Type Thermostat
  • Temperature 205 Degrees With Seal Included OE Temperature This part is also available in the Engine Coolant Thermostat Kit 115KT, which contains 10227 (Radiator Cap), 15138 (Engine Coolant Thermostat) and 74000 (Engine Coolant Temperature Sensor)
  • OE Type Thermostat
  • Product Attributes:
    • Bypass Plate Diameter (in): N/a
    • Flange Diameter (With Seal) (in): 2.21
    • Flange Diameter (Without Seal) (in): 2.04
    • Height from Flange to Bottom (in): 0.82
    • Height from Flange to Top of Bridge (in): 0.78
    • Temperature (F): 205 Degrees
  • Original equipment design. Made of durable material for a long lasting life. Stainless steel assembly engineered for a smooth performance.
Brand: Stant
Position: Upper
Additional Fitment Information:
Vehicle Position Block Engine CID CC
2012 - Nissan Sentra Upper L 4 Cyl 2.0L 122 1997
Gates
2012 Nissan Sentra Engine Coolant Thermostat 4 Cyl 2.5L Gates - (82°C/180°F)

P311-0945E6B    W0133-1797103  New

Qty:
$27.84
  • OE Type
  • Main - Engine Block
  • (82°C/180°F)
Brand: Gates
Additional Fitment Information:
Vehicle Block Engine CID CC
2012 - Nissan Sentra L 4 Cyl 2.5L 152 2488
AISIN
2012 Nissan Sentra Engine Coolant Thermostat 4 Cyl 2.0L AISIN - (82°C/180°F)

P311-336E115    W0133-1828673  New

Qty:
$23.93
  • This Original Equipment Manufacturer part is the same part that was made & installed by the car manufacturer at the factory where the car was produced.
  • Main - Engine Block
  • (82°C/180°F)
Brand: AISIN
Additional Fitment Information:
Vehicle Block Engine CID CC
2012 - Nissan Sentra L 4 Cyl 2.0L 122 1997
AISIN
2018 Nissan Sentra Engine Coolant Thermostat 4 Cyl 1.8L AISIN - (82°C/180°F)

P311-336E115    W0133-1828673  New

Qty:
$23.93
  • This Original Equipment Manufacturer part is the same part that was made & installed by the car manufacturer at the factory where the car was produced.
  • Main - Engine Cooling
  • (82°C/180°F)
Brand: AISIN
Additional Fitment Information:
Vehicle Block Engine CID CC
2018 - Nissan Sentra L 4 Cyl 1.8L 110 1798
Kuzeh
2001 Nissan Sentra Engine Coolant Thermostat 4 Cyl 1.8L Kuzeh - (76.5°C/170°F)

P311-1FE1363    W0133-2079750  New

Qty:
$32.08
Kuzeh Engine Coolant Thermostat
  • This Original Equipment Manufacturer part is the same part that was made & installed by the car manufacturer at the factory where the car was produced.
  • Includes Gasket - OE Temp = 76.5°C/170°F
  • (76.5°C/170°F)
Brand: Kuzeh
Additional Fitment Information:
Vehicle Block Engine CID CC
2001 - Nissan Sentra L 4 Cyl 1.8L - 1769
Kuzeh
2006 Nissan Sentra Engine Coolant Thermostat 4 Cyl 1.8L Kuzeh - (76.5°C/170°F)

P311-1FE1363    W0133-2079750  New

Qty:
$32.08
Kuzeh Engine Coolant Thermostat
  • This Original Equipment Manufacturer part is the same part that was made & installed by the car manufacturer at the factory where the car was produced.
  • Main - Engine Block
  • (76.5°C/170°F)
Brand: Kuzeh
Additional Fitment Information:
Vehicle Block Engine CID CC
2006 - Nissan Sentra L 4 Cyl 1.8L - 1769
Kuzeh
2000 Nissan Sentra Engine Coolant Thermostat 4 Cyl 1.8L Kuzeh - (76.5°C/170°F)

P311-1FE1363    W0133-2079750  New

Qty:
$32.08
Kuzeh Engine Coolant Thermostat
  • This Original Equipment Manufacturer part is the same part that was made & installed by the car manufacturer at the factory where the car was produced.
  • (76.5°C/170°F)
Brand: Kuzeh
Additional Fitment Information:
Vehicle Block Engine CID CC
2000 - Nissan Sentra L 4 Cyl 1.8L - 1769
Stant
2009 Nissan Sentra Engine Coolant Thermostat 4 Cyl 2.5L Stant - (96°C/205°F)

P311-3692DE8    W0133-1951096  New

Qty:
$40.55
  • OE Type
  • Water Control Valve - Water Outlet
  • (96°C/205°F)
Brand: Stant
Additional Fitment Information:
Vehicle Block Engine CID CC
2009 - Nissan Sentra L 4 Cyl 2.5L 152 2488
Stant
2003 Nissan Sentra Engine Coolant Thermostat 4 Cyl 2.5L Stant - (96°C/205°F)

P311-3692DE8    W0133-1951096  New

Qty:
$40.55
  • OE Type
  • Water Control Valve
  • (96°C/205°F)
Brand: Stant
Additional Fitment Information:
Vehicle Block Engine CID CC
2003 - Nissan Sentra L 4 Cyl 2.5L 152 2488

Latest Nissan Sentra Repair and Thermostat Installation Advice

CarJunky AutoAdvice

2005 Nissan Sentra No Heat

Showing 8 out of 10 Posts | Show 2 Hidden Posts
Question From littlerednissan on 2005 Nissan Sentra No Heat

The heat in my 2005 Nissan Sentra is only working intermittedly. The radiator was hot on one side, but cold on the other, so we thought the radiator was clogged so we replaced the radiator and cap (which I think was leaking) and the thermostat. However the radiator is still cold on one side and the heater hoses are cold. When I start driving the heat comes on occasionally.

Response From littlerednissan

We realized after we posted the initial post, that the radiator is not actually cool on one side, he was actually feeling the ac condenser in front of the radiator and that is what felt cold.

We are still having the issue where the hoses into the radiator are hot, but the ones going into the car are not.

Just drove the car for about 30 minutes and the temp gauge never went above the half way point

Response From Sidom

If both heater hoses are cool/warm to the touch, then there is a flow problem going into the heater core. Either core is plugged up or there isn't good flow going into it....

You could try taking heater hose off & flushing it out with garden hose.

Response From littlerednissan Top Rated Answer

Forgot to mention - One of the heater hoses is definitely warmer than the other and when the heat is working it is warmer on the passenger side than the drivers side. In fact, sometimes the passenger side blows hot air and the drivers side is downright cold. Will try flushing them with a hose, thanks for the suggestion!

Response From Discretesignals

Which engine? Is it overheating?

Response From littlerednissan

Nissan Sentra 1.8S
The engine was running hot when I was stopped at lights, but would cool when I started to drive. Since we replaced the radiator it hasn't been running hot.

Response From Sidom

Have you made sure the cooling fans are coming on after the engine heats up?

Response From littlerednissan

The cooling fans are coming on.

Response From Discretesignals

The upper radiator hose is hot, but the lower radiator hose is cold? How did the old radiator look inside? Was it really crusty or plugged?

Response From littlerednissan

The hoses going into and out of the radiator are hot, but the hoses going from the engine into the car are not. I just drove it for about 20 minutes and the heat never came on. I parked for about 15 minutes while I ran into the store and when I fired it up the heat came on, though the air was not as warm at the red lights as when I was actually driving.

The old radiator looked fine, not crusty or plugged from what I could tell, but we are pretty sure it had a leak because it was almost empty and you could smell antifreeze when the car was running, both inside the car (through the vents) and if you were standing over the engine while it was running.

'86 nissan sentra

Showing 2 out of 2 Posts
Question From Guest on '86 nissan sentra

I have a four cylinder, 5 speed manual, '86 nissan sentra. When i start it on cold days the engine will run rough then die as soon as i push on the gas. after waiting about a minute for it to warm up it will run fine. any idea on what the problem might be?

Response From Tom Greenleaf Top Rated Answer

If no code a cheap maybe would be the sensor for engine temp near the thermostat that tells the car that it's cold and behave! Again just a maybe without more info, T

96 NISSAN SENTRA HEATER PROB

Showing 2 out of 6 Posts | Show 4 Hidden Posts
Question From sentra96 on 96 NISSAN SENTRA HEATER PROB

I have a 96 Nissan Sentra with a heater prob. When I let the car run for 10-15min, the heat is luke warm. as soon as I start driving, the heat increases, BUT, when i slow down the heat decreases, and when I stop, I'm back to luke warm. The air doesn't get cold unless it is very cold outside. My coleague told me that if the needle on the water temp gauge on the dash goes up registering heat than the thermostat is ok. If the thermostat is stuck open, would it still register heat on the gauge, and if it is stuck open could this be causing my prob? Every time I stop to get fuel I check the coolant resivour and often have to fill it to max again. What might be causing the heater prob?

Response From DanD

Coolant is not suppose to get used up like what motor oil will; so you must have some form of leak?
If the thermostat is stuck open it will or could still register on the temp gauge but lower then the “normal”. Usually a stuck open thermostat will give you the opposite lack of heat problem from what you’re explaining. Sitting still you will have some heat but once you start to move the cold air rushing through the rad will make the already cool engine run colder.
I’m thinking a partly clogged heater core that when you’re idling the engine; the coolant cannot get through the heater core. When you start driving that speeds up the water pump and now warm/hot coolant is being forced through the core.
What I would try is to have the heater core flushed out and while the cooling system is drained do the thermostat as well; so that the temp gauge is up into it’s normal range.
If the core is plugged with calcium it may not all come out but hopefully enough to get you more heat in the car.
Dan.

Response From sentra96

Dan, Thank You for your reply. Some car buffs at work said the exact same thing you did in your reply. Now I can't wait for the weekend to do this.
If there is no coolant on the ground under the car, or anywhere else, where is the coolant going?

Thanks Again Dan,
Jesse

Response From DanD

You may need to have the cooling system pressure tested; it could be such a small leak that it is evaporating on any hot surface in the engine compartment and never hitting the ground. Pressure testing a cold engine will give you the pressure in the system without the normal heat that occurs with the engine running and you may then find the leak.
This leak may also be internal and the coolant is going out the tail pipe in very small amounts; too the point that it is not visible as in steam, not until the leak becomes worse anyway. If this is the case combustion gases will also be leaking into the cooling system; there are tests that can be performed to confirm this.
The test method I use will detect even the slightest amount of combustion gases; if any are found then the engine would need to come apart, to have the cylinder head gasket replaced and to have the cylinder head checked for cracks or warp-age.
Again if any combustion gases are found in the cooling system the issue should be dealt with right away. If a small leak turns into a large one it could cause severe damage to the whole engine.
Dan.

Response From sentra96 Top Rated Answer

Thanks Again Dan.

Response From Tom Greenleaf

Hard to do with Dan on this but if this t-stat is hard to get at test a new one in a pan of water on a stove. You should probably buy one at a Nissan dealer and get the one for the right temp. They all will open if correct by the specified temp.

This will not solve the systey of cooland loss that's unseen. A head gasket can burn up the coolant and if slow enough you may not see it. They don't heal and avoid sealers as they can't fix water pumps or head gaskets and can clog a heater core and make it worse. Good luck, T

2002 Nissan Sentra Overheats BADLY

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Question From IsaacD on 2002 Nissan Sentra Overheats BADLY

Hello!

I REALLY need help with figuring out what to do with my car. I have a 2002 Nissan Sentra GXE, 1.8 L engine, Blue 4-D Sedan, around 189,000 miles.

The car was overheating very badly and is now not driveable for more than a mile. Within the past 1-2 months there have been replacements of the radiator, hoses, thermostat, and water pump. My mechanic told me that there's a clog in the head that needs to be machined out that is causing pressure in the coolant system, causing the car to overheat.

Could this really be caused by a clog in the head???

Response From Discretesignals Top Rated Answer

It is possible there could be a problem with the coolant passages being clogged in the cylinder head. Have they tested for combustion gasses in the coolant system?

Response From IsaacD

Hmm... Is the "head" as they referred to it the same thing as the "cylinder head"? If that's the case, I think what you describe was what they were trying to tell me is wrong with the car. I don't think they tested for coolant system combustion gases.
(I since moved and towed the car with me to a new location.) What do you suggest is the best way to fix this issue?

Response From Discretesignals

Well, you can't fix it until you determine the cause. Probably would be a good idea to start out by having it tested for combustion gasses in the coolant system. Make sure that both heater hoses are hot when the engine is at operating temperature. If the cooling fans come on when it starts to run hot, make sure the air flowing from them is hot. Feel the upper and lower radiator hoses. Those both should be hot at operating temperature. If the passages are clogged in the cylinder head, your going to have to remove the head to clean them out.

The engine is only going to take so much of overheating before there is some major mechanical damage, so keep that in mind.

Response From IsaacD

Yes, I do remember them explaining to me that the fluid in the radiator and in the hoses is cool even while the engine is severely hot. They didn't name that test, though. But, what you describe is what's going on. It's not just the fan also because I had a repair job on that and the fan comes on every time.

If that's the case, I think I should take their word for it that that's what's wrong with it. What is the most affordable way to fix this clog? They told me that it's 100% clogged and that it's going to take a $1100 job of taking the head to a specialist who will machine it out so they can put the unclogged head back in. Does that sound like what should be done?

Could you recommend a good mechanic in the DMV area? (I live in Maryland, close to DC) Or, should I take it to a Nissan dealership and get it fixed?

Response From Discretesignals

You could take it to the dealer. If you want to take it to an independent shop, ask friend's or coworkers where they take their vehicles. Stay away from the back yard mechanics or ones that don't have a business license or are not insured.

If the cooling passages are clogged inside the cylinder head, it is going to have to be removed and sent off to a machine shop to be checked out. There are also water jackets around the cylinder bores and steams holes( transfer holes) between the cylinder head and engine block that are going to have to be inspected.

It is also possible that if combustion gasses from a bad firing ring(s) of the head gasket, cracked cylinder walls, and/or cracked head can allow combustion gasses to get into the coolant system. Basically that puts super hot air pockets into the coolant system and will cause overheating. They can test for combustion gases using a chemical or with an exhaust gas analyzer.