Why Does My Vehicle’s Engine Get So Dirty?

Everyday use of your vehicle leads to a gradual accumulation of carbon deposits throughout the engine and exhaust system. These issues typically result from poor fuel combustion that creates engine clogging, often stemming from urban traffic, short distances and cold temperature. This is when it’s time to give your engine the deep clean it deserves, using the Green Car Factory decarbonizing station here at D&H Enterprises in Concord, CA. It’s the hydrogen solution for carbon build-up.

D&H Enterprises: Your Local Green Car Factory Center

As a preventive measure every 20,000 miles or once a year, a Green Car Factory decarbonizing session will eliminate carbon deposit problems on the EGR valve, catalytic converter or diesel particle filter (DPF).

D&H Enterprises employs the Green Car Factory machine, and here’s how it works:

The machine generates hydrogen gas and pulses it into the cylinders, thru the air intake, when the engine is idling. Mixed with air and fuel, hydrogen raises the combustion temperature and reacts with the carbon deposits.

A Green Car Factory session helps to remove carbon deposits from cylinders, pistons, valves, the exhaust manifold, EGR valve, turbo charger, catalytic converter and DPF. It recovers original efficiency and lost power. Lost fuel mileage is restored. HC and CO are reduced. And hesitation during acceleration is eliminated.

Stop Replacing Dirty Engine Parts. Just Clean Them!

Replacing various parts of your engine is expensive. New spark plugs, injectors and valves, along with the exhaust manifold, turbocharger, combustion chamber, oxygen sensor, diesel particle filter or catalytic converter, can easily run you hundreds if not thousands of dollars.

The more efficient, less expensive alternative: Clean your engine using the power of hydrogen. Cleaning time depends on engine size, generally 40 minutes for 4 cylinders, 60 minutes for 6 cylinders, or 80 minutes for 8 cylinders. Visit D&H Enterprises, your Green Car Factory center, to experience the many benefits right away!

Come to D&H Enterprises in Concord, CA, for a Green Car Factory decarbonizing session, recommended once a year or every 20,000 miles.

Green Car Factory logo

5-Star rating

"I highly recommend D&H for their integrity and their wonderful workmanship as well as their availability."

Steve W.

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Benefits and Conveniences for Our Customers

  • 3 Years, 36,000 Miles Warranty
  • Nationwide Warranty
  • Courtesy Shuttle Service
  • Vehicle Pickup and Delivery
  • Certified Technicians
  • Full Service Shop
  • In Business since 1995, Owners on Site
  • Friendly Service
  • Competitive Pricing
  • Same Day Service
  • Financing Available
  • Night/Morning Drop Box
  • Factory Parts and Fluids
  • Quality, State of the Art Equipment
  • Free WiFi
  • AAA Membership Benefits
Customer Conveniences

Customer Loyalty: As a family owned repair shop, we’ve always made sure to take care of our customers and community. We participate in fundraising for such programs as Clunkers 4 Charity and cars for careers. We are completely committed to our local Rotary, Clayton Valley/Concord Sunrise and our State Trade Organization, ASCCA. Giving back is our way of saying thanks to our local customers.

Come to D&H Enterprises for the best auto repair in Concord, CA. We look forward to meeting you soon!

No Question Is Too
Big or Too Small

If you are in need of Auto Repair at D&H Enterprises in Concord, CA, or you have any other vehicle needs, D&H Enterprises is the place to go. Give us a call at (925) 356-0683, or stop by our location at 2689 Monument Blvd, Concord, CA 97520. We’ll show you why we are a hometown favorite when it comes to caring for your car, truck, or SUV.

We proudly serve Concord and surrounding communities: Pleasant Hill, Four Corners, Pacheo, and Walnut Creek.