D●T Radiator

DT Radiator • (510) 276-5611

1734 Timothy Dr, San Leandro, CA

Automotive Cooling Systems & Radiator Specialist

Family-owned and Operated by Mario Martinez Since 1972. • Free estimates.

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Business Hours

  • Mon–Fri: 8:00 AM – 5:00 PM
  • Sat: 9:00 AM – 3:00 PM
  • Sun: Closed

Call Mario at (510) 276-5611 or Request a Quote Here • Free estimates.

Our Services

Cooling System Specialist, Vehicle HVAC & Repair

Diagnostics & Repair of radiators, water pumps, thermostats, fan belts, hoses, and heater cores for cars and trucks.

Vintage Expertise

We service vintage radiators & cooling systems for classic vehicles and trucks.

Gas Tank Repair

Rust removal, leak sealing, and coating to restore old gas tanks to safe, like-new condition.

About Us

DT Radiator is your trusted destination for radiator restoration and full-service A/C system repair. With decades of hands-on experience, we specialize in everything under the hood that keeps your engine cool — including water pumps, thermostats, fan belts, hoses, heater cores, and even old gas tanks with leaks and rust. Whether you’re restoring a classic car or maintaining a daily driver, we deliver the kind of care that only decades of experience can offer.

Our Yelp Page

3 Tips to Maximize Your AC & Radiator

Most drivers don’t do these simple things. They make all the difference when you’ve got a fresh radiator and want your AC to last.

  1. Pin It Cold or Hot
    On most cars, set the dial all blue for max cooling or all red for max heat. Mixing the dial wastes energy and doesn’t make the system more efficient.
  2. Start on High
    Don’t baby the fan. Roll the windows all the way down and set the fan to HIGH. The system is built to handle it, and blasting hot air out first makes the AC work better.
  3. Move, Don’t Idle
    Even light driving—5–15 mph—pushes fresh air across the radiator and condenser. That airflow makes the AC chill faster and keeps engine temps steady.

Three simple steps. Better comfort. Longer system life. That’s Dot Radiator.