Working Hours
  • Mon 8:00AM - 5:00PM
    Tue 8:00AM - 5:00PM
  • Wed 8:00AM - 5:00PM
    Thu 8:00AM - 5:00PM
  • Fri 8:00AM - 5:00PM
    Sat Closed
  • Sun Closed
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ENGINE MAINTENANCE

Engine maintenance is vital to keep your car or truck operating at peak performance. It also impacts the longevity of your vehicle's engine. Trust the experts at Jeffrey Auto Repair Service to help you protect your investment. Call us at 641-423-1310 or visit our shop in Mason City 50401-5632.

These are some of the engine maintenance services we offer.

Diesel
Although diesel engines don't require tune-ups and tend to last longer than gasoline engines, they do require regular maintenance. Typical maintenance tasks include:

  • Changing the oil & filter
  • Changing the air filter
  • Changing the fuel filter
  • Bleeding the fuel system
  • Draining the water separators
  • Refilling the urea injection system

You can count on the experts at Jeffrey Auto Repair Service to help your diesel engine last a long time.

Fuel Injection
Fuel injection is a system for admitting fuel into an engine. Since 1990, fuel injectors have completely replaced carburetors as the primary means of getting gasoline into the engine. A fuel injector atomizes the fuel by forcibly pumping it through a small nozzle (under high pressure). Failure of the fuel injection system means poor performance and ultimately destroys the engine. Make sure your vehicle's fuel injection system is maintained properly. For all your fuel injection maintenance and replacement needs, call 641-423-1310 or visit Jeffrey Auto Repair Service today.

Ignition
An ignition system is a system for igniting (using an electric spark) a mixture of fuel and air in a gasoline engine. A properly working ignition system means a properly starting engine and high performance from your car. For all your ignition system maintenance and replacement needs, call or visit Jeffrey Auto Repair Service today.

Ignition Wires & Cables
Ignition cables also known as spark plug wires are an important part of your car's ignition system. They transfer the spark from the ignition coil to spark plugs that ignite the mixture of fuel and air. The mixture starts the engine. Over time, ignition wires and cables get weak and break down. This makes it impossible for the spark to reach the engine cylinders. This results in the engine misfiring. The car will eventually fail to start. If it does start, it will run poorly. Common symptoms of faulty ignition cables and wires are: poor gas mileage, engine misfires, engine light is on, and engine may vibrate. If your car needs new ignition cables and wires, call or visit Jeffrey Auto Repair Service in Mason City, IA 50401-5632. Here, you will have the wires and cables changed by a top-rated mechanic.

Spark Plugs
A spark plug delivers electric current to the combustion chamber from the ignition system. Spark plugs that haven't been changed for a long time can cause ignition problems. At Jeffrey Auto Repair Service, we have automotive experts who will check and replace your spark plugs. For all your spark plug repair or replacement needs, call 641-423-1310 or visit Jeffrey Auto Repair Service today.

Oil, Lube, and Filter
To keep running smoothly, your car highly relies on oil, lube, and oil filters. Oil helps in lubricating, cooling, and cleaning the internal engine components. With time, motor oil becomes contaminated. Your car needs an oil, lube, and filter change every three months (or 3,000 miles). When it is time for a lube, oil, or filter change, take your vehicle to Jeffrey Auto Repair Service in Mason City, IA 50401-5632.

Check Engine Light
No one likes to see their car's "Check Engine" light come on. The light could mean a costly problem, like a bad catalytic converter, or it could be something minor, like a loose gas cap. At Jeffrey Auto Repair Service, we can pull the code and diagnose the problem for you. Give us a call at 641-423-1310 or stop by the shop for our expert assistance.


What Our Customers Are Saying

Excellent service, professional and friendly staff. Knowledgeable techs and gear guys. Respectful and thorough. Thanks for getting our vehicle back on track!


-Kip & Joan

The staff at Jeffrey Auto Repair were very professional and explained what repairs my auto needed. I would recommend them to anyone. The building and grounds are very clean and neat. They know how to treat their customers.


-Dolores K.

I would highly recommend you guys. You were courteous throughout the six weeks you had the vehicle. You made a ton of repairs including the transmission and radiator. But that is not all. I felt as though I had an honest advocate working for me that thought as much of my vehicle as I did. I continued to get options on things that SHOULD be done to keep it running good and things that WILL need fixing in the future. You did not suggest I do everything and that shows your honesty. I feel very confident in the repairs. You even tried a less expensive solution to fix the transmission. Thank you. In the end, I needed the transmission, though, and you had options for me. But all along the way you explained what was wrong and gave me options when there were some. You even went above and beyond and cleaned up the Suburban before I picked it up. I can honestly say no one else has repaired my cars since moving to Mason City 9 years ago. In fact you fixe! d my F-150 when the Ford dealer was unable to do so for 2 years! I have no need to find anyone else to work on my cars. Feel free to share this with any customer. You can even use me for a reference.


-Randal

It was great to have the charges actually be around $30 less than the estimate. Very pleased with all the work you have done for us on each vehicle we have owned over the years.


-Melvin A.

I called at the last minute and made changes to the work I wanted completed on the vehicle. Brian and his mechanics were very accommodating and completed the work before the time the vehicle was promised. I always feel completely comfortable leaving our vehicles for service because I am confident the work will be completed professionally and correctly. Jeffrey's services our vehicles like they are their own. Thank you.


-Linda M.

We've been going to Brian (Jeffrey Repair Service) since we moved into the area in 2012. We found him on accident, but have come to realize that we are extremely lucky in that!! Since then, we have had 5 different cars and he (and his staff) have been amazing on the work with each one of them!!


-Sara S. - Mason City, IA
  • Jasper
  • ASE Master Technician
  • BBB Accredited Business
  • Car Care Aware
  • Call Us For Service: 641-423-1310