Oldsmobile 98 Spark Plug Replacement at your home or office.

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received a Spark Plugs Replacement.
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$106.87 - $326.87

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Spark Plug Replacement Estimate for Oldsmobile 98

Oldsmobile 98 Spark Plug Replacement costs $153 on average.

CarServiceEstimateShop/Dealer Price
1977 Oldsmobile 98V8-5.7LService typeSpark Plug ReplacementEstimate$160.51Shop/Dealer Price$191.17 - $256.65
1969 Oldsmobile 98V8-7.5LService typeSpark Plug ReplacementEstimate$158.91Shop/Dealer Price$189.23 - $253.55
1987 Oldsmobile 98V6-3.8LService typeSpark Plug ReplacementEstimate$150.23Shop/Dealer Price$176.41 - $229.93
1980 Oldsmobile 98V8-5.0LService typeSpark Plug ReplacementEstimate$206.59Shop/Dealer Price$250.51 - $351.85
1982 Oldsmobile 98V8-5.0LService typeSpark Plug ReplacementEstimate$206.59Shop/Dealer Price$247.61 - $346.77
1984 Oldsmobile 98V8-5.0LService typeSpark Plug ReplacementEstimate$206.59Shop/Dealer Price$245.68 - $343.39
1985 Oldsmobile 98V6-4.3L DieselService typeSpark Plug ReplacementEstimate$509.75Shop/Dealer Price$625.09 - $947.72
1980 Oldsmobile 98V8-5.7L DieselService typeSpark Plug ReplacementEstimate$351.83Shop/Dealer Price$430.78 - $642.91
Show example Oldsmobile 98 Spark Plug Replacement prices

Spark Plug Replacement Service

What are spark plugs and how do they work?

Spark plugs are one of the key components of your vehicle’s ignition system. They ignite gasoline and air inside of your engine. This gives your engine the power to propel you down the road. The spark plug takes high voltage electricity from the ignition coil and creates a spark at just right moment during the engine’s combustion cycle. This gives the engine the best mix of power, fuel economy and low emissions. However, the electrode at the end of the spark plug eventually wears out and can cause performance issues.

Spark plugs-MATROX-1

When should you replace spark plugs?

Replacement should follow the vehicle maintenance schedule. This will be listed in the vehicle’s owner’s manual. Some cars require regular replacement at 30k, 60k or 100k miles. It is possible in some cases that a spark plug might fail before the service schedule, but it’s not typically common.

Avoiding spark plug replacement can cause:

  • Difficulty starting your car.
  • Check engine light for a misfire code.
  • Flashing check engine light during acceleration for misfire, this can cause engine damage.
  • Reduced fuel economy and/or power.
  • Rough idle and/or unexplained engine vibration.
  • Failed State emission testing.

Even if only one spark plug is found to be faulty, they should always be replaced in sets. Most engines will require 4,6, or 8 spark plugs.

How do mechanics replace spark plugs?

Spark plugs are threaded into the engine’s cylinder head(s). Most cars have one plug per cylinder, so a four-cylinder engine will have four plugs, a six-cylinder engine will have six plugs, and so forth. The mechanic will:

  • Have the correct spark plugs on hand for your vehicle
  • Pull any diagnostic trouble codes that may be related to worn spark plugs.
  • Remove the original spark plugs and look at removed spark plugs for any clues indicating engine mis-operation exists; such as oil burning, excessively rich mixture, pre-ignition damage etc. Inform owner of any found unusual conditions.
  • Install new plugs using a torque wrench.
  • Finally, a road test of the vehicle to confirm normal operation.

Is it safe to drive with worn spark plugs?

Yes, but spark plugs that are worn enough to cause engine-misfiring have the potential to cause engine damage and overheating of the catalytic converter. Regardless of the age of the plugs, or mileage, if the engine misfires or runs poorly, the plugs should be inspected for defects. Generally, spark plug failure will not keep the engine from running, but in cases of extreme wear, you may experience a limitation in the speed at which you can drive the car. If the maintenance schedule says the plugs should be replaced, it is best to do so promptly.

When having spark plugs replaced keep in mind:

  • High-speed driving may accelerate spark plug wear. Consider earlier than required inspection and tune-up if you operate the car in severe conditions.
  • Plugs should always be promptly replaced per the manufacturer maintenance schedule even if they appear to be working perfectly.
  • If your vehicle is equipped with spark plug wires (as opposed to a coil-on-plug system), the wires should be replaced at the same time. This may increase the cost of your repair.
  • It is possible that when doing a spark plug replacement, your vehicle may also need additional parts like ignition coils, this will add to the repair cost.
  • Some engines require that the intake manifold be removed while replacing spark plugs. This may increase the parts and labor cost for the repair.
  • Leaking valve cover gaskets, which have let oil get in contact with the spark plugs, coils or wires, may be the cause of ignition system issues. Valve cover gaskets will need to be replaced in addition to the spark plugs, wires or coils. This will add to the repair cost.

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Meet some of our expert Oldsmobile mechanics

Real customer reviews from Oldsmobile owners like you.

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YourMechanic Oldsmobile 98 Service

Average Rating

4.9/5

Number of Reviews

27

Rating Summary
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Breck

18 years of experience
528 reviews
Breck
18 years of experience
Oldsmobile 98 - Oil Pressure Light is on - Houston, Texas
The mobile mechanic came. I must say I am impressed! He found my house. He and I started talking. He said he owned two Ninety Eights previously. He was there to look at my Oldsmobile Ninety Eight. He had two Oldsmobile Ninety Eight Touring Sedans. The ones he owned were from the 1987-1990 era. He was describing the floor shifters and they had and how much he liked Ninety Eights, Touring Sedans, and the Oldsmobile Eighty Eight LSS too. He talked about how a family member owned one and how he was fixing his. He talked in detail about the Touring Sedan and the things he loved. He asked me how long had I owned my Ninety Eight. I told him 2003. He told me how he become a mechanic and went to school for it and more. He got into the Ninety Eight and it would not start. He got out and disconnected the battery and rubbed the negative and positive battery terminals together. He reconnected them and the Ninety Eight started! The instrumentation then told him exactly what it was. There is a sensor at the bottom of the oil pan. He said by doing what he did with the terminals, it cleared the computer and reset it. We went underneath the car and he showed me the sensor. He said which one did you replace? I told him. He said you were on the right path. You know what you are doing. You need to replace this sensor and not the one you did. You can get the sensor and replace it because it is clear you know what you are doing and on the right path. He said you also need to replace your valve cover gaskets. They are leaking. I told him I will request him to come back and do that. I am not doing that even thought I can.

Kenny

26 years of experience
91 reviews
Kenny
26 years of experience
Oldsmobile 98 - Oil Change - San Jose, California
Kenny was very informative and down to business. Diagnosed my problem, quickly ordered the parts,scheduled a time to come back, and provided the cost all in a few taps of his phone. I thought it was great having him roll up to my driveway and fix my car while I was in the comfort of my home. By the time i got inside I had an email with the invoice and new appointment.

Luis

7 years of experience
87 reviews
Luis
7 years of experience
Oldsmobile 98 - Brake Shoes (Rear) - Montvale, New Jersey
Luis showed up on time. He is very knowledgeable and took the time to explain my cars issues in detail. The work was done quickly & cleanly but, most importantly done right. I would highly recommend Luis.

Edmar

20 years of experience
144 reviews
Edmar
20 years of experience
Oldsmobile 98 - Car is not starting - Carrollton, Texas
Edmar was very knowledgeable and helpful with his recommendations. I really like the Your Mechanic service offering thus far.

Excellent Rating


YourMechanic Oldsmobile 98 Service

Average Rating

4.9/5

Number of Reviews

27

Rating Summary
26
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1
26
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Red-stars EXCELLENT RATING ON
Number of Oldsmobile 98 services completed
297+
services done by our mechanics
TOTAL NUMBER OF EXPERT Oldsmobile MECHANICS
300+
experts on our platform

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