Diesel engine repair service near Oakland, CA

Diamond Diesel is a FACTORY TRAINED & AUTHORIZED Diesel Fuel injection shop which can service and repair fuel Injection systems manufactured by: ROBERT BOSCH - STANADYNE - LUCAS CAV - YANMAR - AMERICAN BOSCH - ZEXEL/DIESEL KIKI - NIPPONDENSO Diamond Diesel carries the LARGEST INVENTORY OF EXCHANGE UNITS IN NORTHERN CALIFORNIA AND NEVADA FOR: CUMMINS - CAT - DETROIT DIESEL - JOHN DEERE CASE - NAVISTAR / I.H.C. - MACK – GM We provide all levels of Diesel Fuel Injection Repair from leak repair to full overhauls of the Fuel Pump. We also provide toll free trouble-shooting. We have the largest inventory of exchange Diesel Fuel Injection Fuel pumps in California and Nevada as well as quick turnaround time on repair jobs. We also stock related fuel injection parts such as Fuel Filters, Glow Plugs, Vacuum Pumps, Diesel Fuel Additives, Supply Pumps, Starters and much, much more. Our Turbocharger Division provides sales and Service for all makes and models of turbochargers. We offer FACTORY DIRECT PRICING on all turbochargers, including AUTOMOTIVE, AGRICULTURE, MARINE, HEAVY DUTY, AND INDUSTRIAL turbochargers.

Wow! I never thought in my wildest dream I could find an honest, experienced, and affordable mechanic to work on my car, but I did. Thanks, Jay! My son's car was leaking coolant and I knew that was an issue that had to be addressed immediately. I called several mechanics in Richmond, CA who asked for $95 just to diagnose the car. I stumbled upon Jay on the internet by random luck and I called him. He told me he could come out to my place and inspect the car, but because I live at the University Village he could not work on the car (due to restrictions imposed by the university). However, he said to bring the car to his place and that he would check it and, if possible, fix it that same day. Drove to El Sobrante, met Jay, and in 5 minutes he confirmed what he had already suspected on the phone, the radiator was cracked and leaking. He quoted me the price for the radiator and labor, and to my surprise, it was not an exuberant amount. As a UC Berkeley student I am on a limited budget, but what he had quoted me was manageable. Dropped the car off at 12:30 pm and it was fixed by 3:30 pm. Additionally, he gave me a 30 warranty on the labor and, of course, a 1-year warranty on the radiator. So, if you are a Cal student in need of repair work on your car Jay is your man.

We are a complete, fully insured, heavy duty equipment and truck repair shop on wheels. We offer specialized services that can’t be found in any one shop – mobile or not.

I love going to Clayton Valley Auto Service as Jeff and all those who work there are friendly, knowledgeable and do a very good job. When I had a check engine light Jeff's dad told me right off the top that it could be 4 or 5 different things and they would start out with the least expensive until they found out what the trouble was. I'm still driving that van around 5 years later. I really appreciate the great service they give. They are really great for routine maintenance, and wonderful when I have emergencies.

I had problem with the engine with my Mercedes and was cautioned about visiting a dealership. A friend recommended this shop and I drove there .Although it was far from San Jose I am glad I did that . They did a good job and fast and were very courteous... I am very happy with their workmanship and reasonable prices. I just wanted to share my good experience with everyone. Two thumbs up! Azar S.

Founded in 1977 by owner Bob Weitz within the city of Napa. At the end of 2011 we moved to our new facility off North Kelly Road in Napa. Our new 15000 square foot shop located right off highways 12 and 29. Just a few miles west of the Coredlia truck scales. We pride ourselves with being one of the cleanest facilities in our industry today. We offer mobile road service for commercial vehicles in Napa and surrounding counties.