Isuzu Ascender 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

(26)

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

(26)

Car Thermostat Replacement Estimate for Isuzu Ascender

Isuzu Ascender Car Thermostat Replacement costs $215 on average.

CarServiceEstimateShop/Dealer Price
2005 Isuzu AscenderL6-4.2LService typeCar Thermostat ReplacementEstimate$330.29Shop/Dealer Price$400.96 - $568.89
2006 Isuzu AscenderL6-4.2LService typeCar Thermostat ReplacementEstimate$300.95Shop/Dealer Price$365.57 - $520.33
2004 Isuzu AscenderL6-4.2LService typeCar Thermostat ReplacementEstimate$316.29Shop/Dealer Price$384.75 - $551.01
2004 Isuzu AscenderV8-5.3LService typeCar Thermostat ReplacementEstimate$264.51Shop/Dealer Price$319.99 - $447.39
2003 Isuzu AscenderL6-4.2LService typeCar Thermostat ReplacementEstimate$316.29Shop/Dealer Price$384.77 - $551.05
2007 Isuzu AscenderL6-4.2LService typeCar Thermostat ReplacementEstimate$300.95Shop/Dealer Price$365.57 - $520.33
2005 Isuzu AscenderV8-5.3LService typeCar Thermostat ReplacementEstimate$271.51Shop/Dealer Price$326.83 - $454.12
2006 Isuzu AscenderV8-5.3LService typeCar Thermostat ReplacementEstimate$271.51Shop/Dealer Price$327.35 - $455.03
Show example Isuzu Ascender Car Thermostat Replacement prices

Car Thermostat Replacement Service

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 Isuzu mechanics

Real customer reviews from Isuzu owners like you.

Excellent Rating

(26)

Rating Summary
25
1
0
0
0
25
1
0
0
0

MICHAEL

33 years of experience
184 reviews
MICHAEL
33 years of experience
Isuzu Ascender L6-4.2L - Oil Change - Philadelphia, Pennsylvania
Fast, friendly and informative

Scott

36 years of experience
830 reviews
Scott
36 years of experience
Isuzu Ascender L6-4.2L - Ignition Coil - Chandler, Arizona
Great dude. He was fast and efficient.

John

27 years of experience
881 reviews
John
27 years of experience
Isuzu Ascender L6-4.2L - Window Motor / Regulator Assembly Replacement (Passenger Side Front) - Friendswood, Texas
Excellent as always John is prompt friendly efficient and happy to explain any questions or concerns I may have

Theodore

16 years of experience
1442 reviews
Theodore
16 years of experience
Isuzu Ascender L6-4.2L - Ignition Coil - Bellevue, Washington
Theodore was very professional and friendly. Theodore was methodical with his diagnostics and quickly found the issue. The issue was resolve on the same visit. I would highly recommend Theodore. All this and a great price.

Excellent Rating

(26)

Rating Summary
25
1
0
0
0
25
1
0
0
0
Number of Isuzu Ascender services completed
286+
services done by our mechanics
TOTAL NUMBER OF EXPERT Isuzu MECHANICS
200+
experts on our platform

Recent articles & questions

Jeep Certified Pre-Owned (CPO) Car Program
If If you are in the market for a used Jeep vehicle, you may want to check out cars under their certified pre-owned program. Many manufacturers have a certified pre-owned (CPO) program, and each one is set up differently. Read...
Top 10 Scenic Drives in Kentucky
It doesn’t take long to realize why Kentucky is known as “The Bluegrass State” with how richly colored the grass is due to the fertile soil. The region is also renowned for its horse racing history and bourbon-making centers. These...
How Can I Prevent Door Seals From Leaking?
When When your car door seals leak, it’s more than just a passing nuisance. Water damage can occur to your interior, necessitating the replacement of upholstery or other components. In nearly every instance of leaking car door seals, which you...

Act like it runs out of gas but it doesn't

It sounds like you're having a fuel pressure issue. If you have a fuel pressure gauge, connect it to the shrader valve on the fuel line under hood and check the readings. It should be over 10psi if it has...

Leaking transmission fluid and knocking

If you are positive that your vehicle is leaking transmission fluid, the knocking sound is likely related. I would recommend having your vehicle inspected for leaks first. Once the leak source is determined, have it repaired by a qualified professional...

Replace a oil pump

Replacing an oil pump involves dropping down the front sub frame and then removing the oil pan. You will need to support the engine and transmission assembly. The important question here is: why are you replacing the pump? ...

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