Mercury Montclair Spark Plug 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

(49)

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

(49)

Spark Plug Replacement Estimate for Mercury Montclair

Mercury Montclair Spark Plug Replacement costs $154 on average.

CarServiceEstimateShop/Dealer Price
1966 Mercury MontclairV8-7.0LService typeSpark Plug ReplacementEstimate$225.75Shop/Dealer Price$269.59 - $373.21
1968 Mercury MontclairV8-7.0LService typeSpark Plug ReplacementEstimate$205.75Shop/Dealer Price$249.61 - $353.24
1960 Mercury MontclairV8-7.0LService typeSpark Plug ReplacementEstimate$205.75Shop/Dealer Price$249.61 - $353.24
1967 Mercury MontclairV8-6.7LService typeSpark Plug ReplacementEstimate$205.75Shop/Dealer Price$249.59 - $353.20
1965 Mercury MontclairV8-6.4LService typeSpark Plug ReplacementEstimate$205.75Shop/Dealer Price$249.62 - $353.27
1967 Mercury MontclairV8-6.4LService typeSpark Plug ReplacementEstimate$205.75Shop/Dealer Price$249.61 - $353.24
1960 Mercury MontclairV8-6.3LService typeSpark Plug ReplacementEstimate$210.75Shop/Dealer Price$254.47 - $358.00
1967 Mercury MontclairV8-7.0LService typeSpark Plug ReplacementEstimate$210.75Shop/Dealer Price$254.84 - $358.66
Show example Mercury Montclair 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.

Fast and easy service at your home or office

Backed by 12-month, 12.000-mile guarantee


Meet some of our expert Mercury mechanics

Real customer reviews from Mercury owners like you.

Excellent Rating

(49)

Rating Summary
48
0
0
0
1
48
0
0
0
1

Cary

27 years of experience
92 reviews
Cary
27 years of experience
Mercury Cougar V6-2.5L - Spark Plugs - Benson, North Carolina
my experience was wonderful

Dan

39 years of experience
938 reviews
Dan
39 years of experience
Mercury Grand Marquis V8-5.0L - Spark Plugs - Lawrenceville, Georgia
Super nice guy and knows his stuff. He was on time and got the job done right. Would highly recommend!

Stephen

32 years of experience
162 reviews
Stephen
32 years of experience
Mercury Tracer L4-2.0L - Spark Plugs - Wheat Ridge, Colorado
He was very courteous and professional. He replaced my spark plugs quickly and ran a diagnostic. Everything came up good. Thank you Stephen.

Stacy

24 years of experience
366 reviews
Stacy
24 years of experience
Mercury Grand Marquis V8-4.6L - Spark Plugs - Riverdale, Georgia
Very courteous. Great service. Definitely Recommend.

Excellent Rating

(49)

Rating Summary
48
0
0
0
1
48
0
0
0
1
Number of Mercury Spark Plugs Replacement services completed
539+
services done by our mechanics
TOTAL NUMBER OF EXPERT Mercury MECHANICS
600+
experts on our platform

Recent articles & questions

A Buyer’s Guide to the 2012 Volkswagen Eos
The The Eos is the practical convertible lover’s dream. With a hard top and four seats, this car breaks tradition by offering luxurious touches at a less-than-luxury price. For those who want an affordable, sporty convertible with a bit more...
How to Register a Car in Vermont
If If you are looking to get a new start, then moving to a new state is your best bet. Vermont is one of the most peaceful and serene states in the country. If you are planning a move to...
How to Test Your Alternator
Having your alternator fail can leave you stranded on the side of the road. Though it is not necessary to know every aspect...

Overheating

Hello. Heater failure and transmission issues are signaling that the cooling system is having a complete meltdown. Both of these systems depend on the cooling system to work correctly. Typically when the entire system is struggling there is a severe...

My check engine light came on and my car was diagnosed as needing a catalytic converter. Now, my car won't start.

Hello, thank you for writing in. The catalytic converter can cause a vehicle not to start. This would be an extreme situation where part of the catalyst inside has broken off and is clogging the entire exhaust pipe. Tap on...

Can a $2,500 car drive 30 plus hours and over 2,000 miles?

Hi there. That's very difficult to answer. The cost of a vehicle is not as important as the mechanical condition of the vehicle. If all systems are properly lubricated, the coolant system works correctly, all belts and hoses are tight...

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