For radiator repair in Knoxville, report what you actually noticed: a coolant leak, rising temperature, steam or repeated coolant loss. A temperature warning does not identify the radiator as the failed part. Call (865) 606-6602 to discuss a cooling-system appointment with Johnson's Auto Service at 712 N Wooddale Rd.
Can I drive with an overheating engine?
If the temperature warning appears or the engine is overheating, pull over safely and follow the instructions in your vehicle's manual. Do not keep driving to complete the trip, and never open a hot cooling-system pressure cap. Ask about transport instead of attempting another drive to the shop. Manufacturer guidance, including Hyundai's coolant instructions, warns about hot pressurized coolant and the importance of the specified mixture.
Radiator, hose, water pump or another cause?
Describe when the temperature rises: stopped in traffic, at road speed or on a climb. Ask what the inspection establishes about leaks, coolant circulation and fan operation before approving parts. A puddle under the vehicle and a temperature rise without an obvious leak are different observations; give the shop both if both occur.
The estimate should identify the failed component, the required coolant and any related work. A coolant service and a repair for an active leak are different jobs. Ask how the system will be checked after repair rather than assuming fresh coolant alone fixes overheating.
Before a mountain or lake trip
If the vehicle ran hot on a previous drive toward Gatlinburg, or while towing toward Norris Lake, describe the load and driving conditions when booking. Schedule the inspection before another climb. Our Knoxville mountain-driving cooling guide gives more context for that conversation.
Current hours are Mon–Fri 9:00 AM – 5:00 PM, closed Sat–Sun. If the warning is a check-engine light rather than a temperature alert, mention that explicitly and review engine diagnostics. For preparation without an active fault, start with scheduled maintenance.