Diesel Engine Repair

Diesel engines are common in fleet vehicles, semi-trucks and pickup trucks. With the rising price of traditional gasoline, diesel is also becoming a more popular choice for family vehicles. Our shop provides service for diesel engines of all sizes. The experts at Legacy Automotive Inc. use the latest diagnostic tools to ensure your diesel engine is running as it should.

Diesel engines are exceptionally reliable, but they do need regular maintenance in order to stay in top condition. You must keep your diesel engine’s oil and filters changed at regular, scheduled intervals. Because diesel engines do not have electrical ignition parts such as plugs and wires, there are fewer components within the vehicle that need to be maintained. Still, you do need to make sure that the regular maintenance that does need to be performed on your diesel vehicle is done by a shop that understands and is experienced in working with diesel engines.

Problems such as leaky gaskets, cooling system issues, overheating, air and oil filtration issues, fuel system restrictions, dirty injectors, piston scoring, faulty injection timers and hard starting can be solved by bringing your diesel vehicle to the knowledgeable and experienced team at Legacy Automotive Inc..

Diesel engines operate differently than a gasoline engine. While they are both internal combustion, the way the fuel is ignited is totally different. Diesel engines (and diesel engine repair) have been around since 1892.

Diesel fuel is less combustive than gasoline. It requires a high temperature to ignite it. Diesel fuel autoignites at 410ºF. The high compression of a diesel engine is what allows it to reach this temperature.

The need for the high compression is because the diesel engine does not have an electrical system for ignition. Because of the fact there is no high voltage electrical ignition system gives the engine its reliability. It also makes the engine able to run in harsh conditions. This is why most boats and heavy duty trucks have diesel engines in them.

When you have high compression in the cylinder, you need to have a high pressure fuel delivery system. Diesel engines have basically two different types of fuel delivery systems. The injector pump pumps fuel into each cylinder individually. Injector pumps precisely measures the fuel, puts it under high pressure then injects it into each cylinder.

Common rail systems are becoming the more popular way fuel is delivered nowadays. It basically works the same way most fuel injected cars work. There is one common fuel line that has the fuel at high pressure and then uses injectors that disperse the fuel. They can be either an electronically controlled or a mechanically controlled system that runs off of the engine’s gear train.

Our technicians at Legacy Automotive are trained to work on diesel cars and light trucks. Come in and let us evaluate the condition of your diesel engine.


1900 55th Street
Boulder, CO 80301