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25% Off Online Orders of Select Hard Parts. Enter Promo Code MMJ25 in Cart.

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Receive Up To 25% Off Your Online Purchase Of Select Parts And Accessories
Use promotional code MMJ25 at checkout to receive 25% off the following categories: Select Brake Parts, Select Hi-Performance and Truck Accessories, Batteries, Water Pumps, Belts, A/C Parts, Starters, Alternators, Fuel Pumps, Radiators, Radiator Fans, Thermostats, Caps & Clamps, Clutches, Spark Plugs, Plug Wires, Chassis, CV Axles, Batteries, Battery Chargers & Booster Cables, OE Locks, Rack & Pinons, Window Motors, RainX Wipers, Appearance Chemicals, Car Wash Accessories, Floor Mats, Lift Equipment, Hand Tools, Travel Accessories, Outdoor Lifestyle, Towing, Car Covers, Seat Covers, Wheel Covers, Body Repair, Collectibles and Apparel.

Use promotional code MMJ20 at checkout to receive 20% off the following categories: Ignition, Air Filters, Oil Filters, Bearings & Seals and Engine Parts.

Offers not valid in combination with any other discounts, promotions or items already on sale. Not valid on gift cards, special orders, installed merchandise, commercial or fleet purchases. Those products that are included in these offers will be displayed in product search results and product detail pages. Excludes the following brands: Champion, Powerstop, Razor, Traxxas, Superchips, Hypertech, Edge, Bully Dog, Diablo, Edelbrock, Holley, NOS, Proform, Specialty Auto, Autometer, Accel, K&N, Kenwood, Pioneer, Sony, Thule, Thule Karrite, JVC, Flowmaster, Hurst, B&M, MSD, Moog, Wagner, Philips and BBK Performance. Valid online until 11:59 PM EST on 9/24/17.

Use promotional code SHOCKS25 at checkout to receive 25% Off DIY Shocks & Struts

Receive 25% Off Wagner branded brake parts with your online purchase. Use promotional code: WAGNER25.

Receive 10% Off Select Champion, MOOG and FelPro branded products with your online purchase. Use promotional codes: CHAMP10, MOOG10 and/or FELPRO10.

Free Shipping on Orders Over $40 or in-store pickup





The radiator is the primary component of the engine cooling system, and with the support of the thermostat, it regulates engine temperature. A radiator successfully keeps the vehicle’s engine cool, which in turn helps prevent it from overheating. Radiators often contain a separate internal heat exchanger to cool automatic transmission fluid.

What is a Radiator and how does it work

How Does it Work?

  • A radiator is connected to channels running through the engine and cylinder head, through which a coolant liquid is pumped.
  • Coolant carries the heat away from the engine as it fl ows, and radiators transfer the heat from the fl uid inside to the air outside. This allows the fl uid to cool, which then cools down the engine.

How is it Made?

  • Most modern cars use aluminum composite radiators, where the core is aluminum and the side tanks are reinforced plastic.
  • These radiators are made by brazing thin aluminum fins to flattended aluminum tubes.

Why Does it Fail?

  • Failure to service the coolant is a primary reason for failure. As coolant becomes more acidic over time, it consumes the aluminum core from the inside out.
  • Age is a common culprit in the final days of radiators.
  • Heavy use and being exposed to the elements wear down radiators.
  • Corrosion, salt and humidity cause a radiator to fail over a period of time.
  • When corrosion or contamination starts to form, it will slowly decrease the radiators capabilities until it breaks down completely
  • Collisions can also cause radiator failure, especially if the underhood becomes tighter due to impact.

What are the Symptoms of Failure?

  • Puddles of coolant.
  • Sweat smell under the hood.
  • Overheating engine.
  • Leaking coolant.
  • Radiator sludge.

What are the Implications of Failure?

  • Car overheats and produces steam/smoke.
  • Bad thermostat.
  • Electric fan no longer comes on.
  • Failed head gasket.
  • Bad seal between radiator cap and expansion reservoir, or too much air in system after fluid change.

How Difficult is the Install?

Difficulty Rating:

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