Nissan D21 Car Thermostat Replacement at your home or office.

Our mobile mechanics offer services 7 days a week. Upfront and transparent pricing.

Estimate price near me

Service Location

Customer Ratings

(46)

Included for free with this service

Online Booking

Mechanic comes to you

12-month / 12k-mile warranty

Free 50 point safety inspection

Our certified mobile mechanics can come to your home or office 7 days a week between 7 AM and 9 PM.

Customer Ratings

(46)

Car Thermostat Replacement Service

How much does a Car Thermostat Replacement cost?

On average, the cost for a Nissan D21 Car Thermostat Replacement is $160 with $65 for parts and $95 for labor. Prices may vary depending on your location.

CarServiceEstimateShop/Dealer Price
1989 Nissan D21V6-3.0LService typeCar Thermostat ReplacementEstimate$375.02Shop/Dealer Price$429.41 - $545.31
1987 Nissan D21V6-3.0LService typeCar Thermostat ReplacementEstimate$333.02Shop/Dealer Price$387.44 - $503.38
1992 Nissan D21L4-2.4LService typeCar Thermostat ReplacementEstimate$304.76Shop/Dealer Price$357.61 - $477.85
1992 Nissan D21V6-3.0LService typeCar Thermostat ReplacementEstimate$350.62Shop/Dealer Price$409.39 - $538.49
1994 Nissan D21L4-2.4LService typeCar Thermostat ReplacementEstimate$304.76Shop/Dealer Price$357.64 - $477.89
1986 Nissan D21L4-2.4LService typeCar Thermostat ReplacementEstimate$224.73Shop/Dealer Price$267.18 - $372.00
1989 Nissan D21L4-2.4LService typeCar Thermostat ReplacementEstimate$229.73Shop/Dealer Price$272.05 - $376.76
1988 Nissan D21V6-3.0LService typeCar Thermostat ReplacementEstimate$343.52Shop/Dealer Price$398.44 - $514.74
Show example Nissan D21 Car Thermostat Replacement prices

What is an engine cooling system thermostat and how does it work?

The car's engine cooling system thermostat is a small valve within a cooling system passageway that opens and closes in response to the temperature of the circulating engine coolant. When your car is first started and the coolant is cold, the valve in the thermostat will be in the closed position, circulating the coolant flow only within the engine instead of flowing to the radiator, which allows the engine to warm up fast, promoting fuel efficiency, low emissions, and reduced engine deposits. Once the engine coolant reaches the design temperature, usually around 195 degrees, the valve will open and close as you drive in order to maintain a coolant temperature typically between 195 to 225 degrees Fahrenheit.

Thermostat

When to consider replacing the engine cooling system thermostat:

  • Engine overheats. A thermostat with the valve stuck closed is a common cause of engine overheating. However, since there are other causes of overheating, a mechanic will thoroughly inspect the cooling system prior to condemning the thermostat. Since it is usually not known how badly the engine overheated, the mechanic will also try to determine if there is evidence that the cylinder head gasket was blown. If so, it would be repaired prior to replacing the thermostat.
  • Temperature gauge reads too low or too high. Thermostats can get sticky, causing the engine temperature to stray from the optimal range. Your dash-mounted temperature gauge will notify you of this malfunction.
  • Cooling system repairs. All thermostats eventually fail. Therefore, if the cooling system is already open for major repairs, such as water pump or radiator replacement, it is recommended to install a new thermostat simply as insurance against future breakdown.

How do mechanics replace the engine cooling system thermostat?

  • Once the engine is completely cold, the radiator cap is loosened and enough coolant is drained from the radiator so the coolant level is below the thermostat housing.
  • The thermostat housing is removed and the thermostat and gasket are extracted. Note that some cars have more than one cooling system thermostat and both might need replacement.
  • All mounting surfaces on the thermostat housing are cleaned of old gasket material. A new gasket is applied and the thermostat is re-installed in the correct orientation and with the temperature sensing cylinder facing downward towards the engine.
  • The thermostat housing bolts are tightened to original equipment manufacturer (OEM) specifications using a calibrated inch-pound torque wrench.
  • The cooling system is refilled with the appropriate coolant type and the system is fully bled of all air.
  • The car engine is run until the normal operating temperature is reached, and while taking precautions with the hot coolant, the coolant level is rechecked while confirming there is flow through the radiator — either visually or with an infrared temperature gun. This will confirm the thermostat is open. Finally, the engine is checked for leaks.

Is it safe to drive with an engine cooling system thermostat problem?

No. If it has been determined that there is a thermostat problem, it should be repaired right away. Failure to do so can cause substantial and costly damage to the engine.

When replacing the engine cooling system thermostat keep in mind:

  • Engine overheating due to causes other than a faulty thermostat, will themselves damage a thermostat. Therefore, always replace the thermostat if the engine overheats, even if the thermostat was not the initial cause of the overheating.
  • The thermostat should be replaced anytime you have major work done on the coolant system. It is convenient and costs little during such repairs and insurance against future breakdown.
  • OEM thermostats are the best ones to use and you can request your mechanic to install only the OEM thermostat. Dealer supplied, OEM thermostats are sometimes more costly but are generally higher quality and specifically engineered for your car.

Fast and easy service at your home or office

Backed by 12-month, 12.000-mile guarantee


Meet some of our expert Nissan mechanics

Real customer reviews from Nissan owners like you.

Excellent Rating

(46)

Rating Summary
43
1
0
0
2
43
1
0
0
2

Joe

0 years of experience
7 reviews
Joe
0 years of experience
Nissan D21 V6-3.0L - Clutch Slave Cylinder - Newalla, Oklahoma
great helpful fast

Michael

8 years of experience
18 reviews
Michael
8 years of experience
Nissan D21 L4-2.4L - Car is not starting - Tempe, Arizona
Easy, comfortable, nice to have someone with the knowledge working on the vehicle

Michael

16 years of experience
606 reviews
Michael
16 years of experience
Nissan D21 L4-2.4L - Exhaust Gas Recirculation/EGR Valve - Atlanta, Georgia
Honest on time and very informative

Paul

33 years of experience
134 reviews
Paul
33 years of experience
Nissan D21 L4-2.4L - Brake Pads Replacement (Front) - Raleigh, North Carolina
Paul was on time. Did a good job and friendly.

Excellent Rating

(46)

Rating Summary
43
1
0
0
2
43
1
0
0
2
Number of Nissan D21 services completed
506+
services done by our mechanics
TOTAL NUMBER OF EXPERT Nissan MECHANICS
1500+
experts on our platform

Recent articles & questions

Symptoms of a Bad or Failing Cruise Control Cable
If your accelerator pedal gets stuck or cruise control stops functioning, you may need to replace the cruise control cable.
P0181 OBD-II Trouble Code: Fuel Temperature Sensor 'A' Circuit Range/Performance
P0181 P0181 code definition Fuel Temperature Sensor ‘A’ Circuit Range/Performance What the P0181 code means P0181 is a generic OBD-II code that is triggered when the fuel temperature sensor ‘A’ circuit goes out of specifications during self-testing. This indicates that...
P0400 OBD-II Trouble Code: Exhaust Gas Recirculation Flow Malfunction
P0400 code definition Exhaust Gas Recirculation Flow Malfunction What the P0400 code means P0400 is an OBD-II generic code that the engine...

Car won't charge after replacing battery and alternator

From the looks of it, you have done a lot of work on your Mustang. I can understand how frustrating it must be to get this far but still be experiencing problems with charging. The first question I would ask...

Transmission slips off line under mid-full throttle

Hello there, thank you for asking about your 1998 Oldsmobile LSS. The first thing to have checked in a situation like this is the transmission fluid level. Using the directions laid out in the owner's manual, inspect the transmission fluid...

My car won't start.

This may be related to a weak battery or a faulty starter relay. The starter relay directs power from the battery to the starter solenoid which then engages the starter when you turn the key. When this is not working...

How can we help?

Our service team is available 7 days a week, Monday - Friday from 6 AM to 5 PM PST, Saturday - Sunday 7 AM - 4 PM PST.

1 (855) 347-2779 · hi@yourmechanic.com