Oldsmobile 98 Car Thermostat Replacement Costs

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Car Thermostat Replacement Service

How much does a Car Thermostat Replacement cost?

On average, the cost for a Oldsmobile 98 Car Thermostat Replacement is $205 with $65 for parts and $140 for labor. Prices may vary depending on your location.

Car	Service	Estimate	Shop/Dealer Price
1994 Oldsmobile 98V6-3.8L Turbo	Service typeCar Thermostat Replacement	Estimate$315.02	Shop/Dealer Price$358.63 - $481.34
1990 Oldsmobile 98V6-3.8L	Service typeCar Thermostat Replacement	Estimate$309.21	Shop/Dealer Price$351.85 - $475.64
1995 Oldsmobile 98V6-3.8L	Service typeCar Thermostat Replacement	Estimate$308.31	Shop/Dealer Price$350.75 - $473.88
1992 Oldsmobile 98V6-3.8L Turbo	Service typeCar Thermostat Replacement	Estimate$306.01	Shop/Dealer Price$347.87 - $469.28
1991 Oldsmobile 98V6-3.8L	Service typeCar Thermostat Replacement	Estimate$309.25	Shop/Dealer Price$353.40 - $478.34
1994 Oldsmobile 98V6-3.8L	Service typeCar Thermostat Replacement	Estimate$309.25	Shop/Dealer Price$352.06 - $476.01
1995 Oldsmobile 98V6-3.8L Turbo	Service typeCar Thermostat Replacement	Estimate$306.01	Shop/Dealer Price$347.89 - $469.31
1993 Oldsmobile 98V6-3.8L Turbo	Service typeCar Thermostat Replacement	Estimate$306.01	Shop/Dealer Price$347.87 - $469.28

Show example Oldsmobile 98 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.

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Shaun

11 years of experience

542 reviews

Shaun

11 years of experience

by Christian

Oldsmobile 98 V6-3.8L - Oil Change - Tempe, Arizona

Shaun' s always great and willing to go the extra mile to help you out.

Carlos

17 years of experience

362 reviews

Carlos

17 years of experience

by Henry

Oldsmobile 98 V8-5.7L - Brake System Flush - Bedford, Texas

Great guy went a above and beyond on my breaks of my 78 Oldsmobile a one customer service

Ben

42 years of experience

1589 reviews

Ben

42 years of experience

by LANDIS

Oldsmobile 98 V6-3.8L - Oil Pressure Light is on - Houston, Texas

They just sent an email saying the mechanic is on his way. It is only 8:12 am! He is off to a good start. He is supposed to arrive between 9:00-9:30 am. He arrived well before that time! It was not 9:00 am yet! He did a diagnostic and he checked all the work I did. He said I did great work with everything I did. He said the car is very good shape. He said this car is indeed a runner! He checked everything. He checked all the fuses and relays too. He did a complete diagnostic too. He checked fuel pressure, oil pressure, and more. He found out what it was. It had nothing to do with oil pressure or anything. The fuel pump is going out. When he came the car started right up. He said they never go totally out. He said that is why it started when it did. He connected tools I do not have to the Ninety Eight. It is not getting any fuel pressure, and this is why it shut off all the times it did. He fixed one of the spark plug wires too. It was burnt. He jacked the Ninety Eight up and got underneath and checked the wires, the oil pressure sensor/switch and oil level sender for everything and the connections and made sure they have power and were installed correctly. He said the engine uses oil pressure along with the fuel pressure to start. The fuel pressure is non existent and that is why it would not start. After all of that, he looked at the Oldsmobile Toronado, my other car . He got the air conditioner to work again. He said the compressor bolt was loose and he tightened it up. He used this huge screw driver device and bent it back in place. He said the shims were loose and he bent them back. It cools just fine now. We turned it on and off several times testing it. He checked the pressure and it was filled with refrigerant. He checked the relays and the fan too. It was all fine. He said it is clear you take care of both of your cars. He said one thing I will not do is guess and I like to know what is indeed wrong. He said your cars are in good shape. He said you do not need valve cover gaskets. There is no leak. I booked him to return to install the fuel pump I need. I look forward to seeing him again soon in a few weeks. Today only cost me 70.00. That's it.

Efrain

21 years of experience

101 reviews

Efrain

21 years of experience

by Adedeji

Oldsmobile 98 V6-3.8L - Brakes, Steering and Suspension Inspection - Bowie, Maryland

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