Professional Diesel Service
Specialized fix and maintenance for diesel engines, from classics to modern turbos.
Expert Diesel Engine Repair
Diesel engines are known for their torque and durability, but they require specialized knowledge to fix properly. We service both older mechanical diesel engines and modern common-rail turbo-diesels with complex emission control systems. Our services include diagnosing and fixing glow plug systems, fuel injectors, turbochargers, and high-pressure fuel pumps. We understand the unique demands of diesel operation and use the specific tools and analysis required to keep your oil-burner running strong and efficiently.

Modern Diesel Emission Systems
Today's diesel engines have sophisticated emission systems that include Diesel Particulate Filters (DPF), Selective Catalytic Reduction (SCR) with DEF fluid, and Exhaust Gas Recirculation (EGR) systems. Problems here can lead to reduced power, poor fuel economy, and warning lights. We have the scan tools capable of communicating with these systems to perform forced regenerations, diagnose faults, and test components. We can help you maintain compliance and performance without the dealership price tag.
Diesel Fuel System Service
The fuel system is the heart of a diesel engine. We perform cares like fuel filter changes, which are critical for preventing damage to expensive injectors and pumps. We can diagnose and replace faulty injectors, ensuring they are properly coded to the engine computer. For performance enthusiasts, we can advise on and install tuners and delete kits where legally permissible. Whether you drive a heavy-duty truck or a diesel sedan, trust our knowledgeableise to keep it running at its best.
Services We Offer
Diesel Repair for All Vehicles
Power and Efficiency Restored
Understanding and fixing the complex emission systems on modern diesel vehicles.
Leonardi Automotive
7426 Redwood Boulevard, Novato, California 94945, USA