D●T Radiator • (510) 276-5611

1734 Timothy Dr, San Leandro, CA

Automotive Cooling System Specialist

Owned and Operated by Mario Martinez Since 1972 • Free Estimates

¡Hablamos Español!

Mario's Hours

Mon–Fri: 8 - 5
Sat: By Appointment
Sun: Closed

Call Mario at (510) 276-5611 • Get a Free Quote Here• Free Estimates

Our Services

Cooling System Specialist & Comprehensive Radiator Service

Diagnosis, Repair, and Replacement of Radiators for all cars and trucks, classic or modern. We specialize in classic radiators!

Vintage Radiator Expertise

Mario has 50 years of experience servicing Classic Cars and Trucks.

Vintage Gas Tank Restoration & Repair

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

Comprehensive Forklift Service

Convieinently located in the same building as forkliftjk.com, we are a full-service forklift and truck radiator shop.

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About Us

Family-owned since 1972, DOT Radiator is your trusted destination for comprehensive radiator knowledge & service. With decades of hands-on experience, we specialize in everything under the hood that keeps your engine cool. 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.

3 Tips to Maximize Your Car's A/C Quality & Radiator

Let Hot Air Escape Before Asking the System to Cool the Cabin
Let heat escape and set the fan to HIGH. The system is built to handle it - blasting hot air out first makes the AC work better.
Setting the Dial All Cold or Hot Should Be Most Efficient
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.
Move, Don’t Idle For Cold A/C
Light driving, even 5–15+ mph—pushes fresh air across the radiator and condenser. Airflow makes AC chill faster and keeps engine temps steady.

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