To all our valued customers:

Many businesses in our city are presently closed due to the mandatory shelter in place ordinance and it has recently been extended. Auto repair services like Thom's are classified as an Essential Business thus allowing us to to be open and available to perform the needed services on our clients vehicles . We are taking the necessary precautions to ensure proper sanitation practices in our work area and the office, as well as disinfecting the interior of your vehicles upon arrival and completion of work. We have created a No Contact drop area outside of the waiting room; payment can be accomplished via credit card over the phone. We understand that finances are being stretched at this time, but reliable vehicles are a necessity, if funding is an issue we have various option available upon request.For those sheltering in place and would prefer vehicle pick up and delivery, we are able to accommodate you within a five mile range of the shop. These are trying and uncertain times for everyone and we want all of our clients to remain healthy and safe and know you can call on us for support during you times of need.

$25 Off Repairs
$25 off repairs totaling $150 or more in labor expenses. One coupon per visit. Not valid with other offer ... [More] or special. Coupon must be presented in advance. ... [Hide]
FREE Brake Inspection!
Check brake pads, rotor surface, brake fluid, brake components. Any additional parts and/or labor extra. ... [More] Not valid with other offer or special. Coupon must be presented in advance. ... [Hide]

Heating/Heater Cores

In Chicago, we get some chilly, snowy winter weather, and therefore it is important to have a working heater in your car. Unfortunately, car heating systems are susceptible to failing and when that happens, you need a mechanic’s attention. During the cold months, it is imperative to have an operable heater and defroster. At Thom’s Four Wheel Drive, our expert technicians can determine the cause of the problem and fix it quickly and cost-effectively to get you traveling in comfort once again.

Your car’s climate control/heating system is driven by a heater core that works in conjunction with the engine’s cooling system. The system cools the engine by sending the heated antifreeze to the radiator, which allows outside air to blow across the radiator and cool the antifreeze. The antifreeze is then sent back to the engine. Hot antifreeze circulates throughout the cooling system via the radiator and heater hoses. When the car’s climate control heater is turned on, a diverter door opens to the heater core in the dashboard, and the A/C fan or blower directs air through the heater core, through the ducts, and into the interior of your car.

However, corrosion can build up in the system due to lack of cooling system flushes. In addition to serving as a temperature control substance, antifreeze also is a lubricant and rust inhibitor. If not flushed and replaced periodically, corrosion can develop. If antifreeze is dirty, it is a usually a sign of a coolant leak in the cooling system that has allowed air to enter the system. It could also be a leaky radiator/hose, water pump, or heater core. But no matter the problem, it must be remedied quickly to not only keep your car’s cabin comfortable, but also to prevent other underlying issues from turning into bigger problems. Count on Thom’s Four Wheel Drive for your heating/heater core service.

GIVE US A CALL: (773) 577-5701

WORKING HOURS: Mon - Fri: 7:00 AM - 5:30 PM

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