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Why do diesel engines need fuel filters?
The purpose of a diesel fuel filter is to ensure that fuel is clean before it gets to the injectors. Modern diesel fuel injection systems are precision engineered with extremely low tolerances. These systems create a great deal of heat and rely on an unobstructed fuel flow to keep the fuel pump and injectors cool.
Why do diesels have two fuel filters?
Most diesels have two fuel filters: a “primary” filter located between the fuel tank and the engine, which cleans the fuel before it gets to the fuel transfer pump; and a “secondary” filter up near the engine, which gives the fuel a final cleaning before it gets to the fuel injectors.
How long should a diesel fuel filter last?
10,000 to 25,000 miles
All vehicles should come with a maintenance guide telling owners when certain parts should be replaced. And while most diesel fuel filters should be replaced every 10,000 to 25,000 miles, it could vary depending on how frequently the vehicle is used and how well it’s maintained.
How do I know if my diesel fuel filter is bad?
5 Signs of a Bad Fuel Filter
- Poor Engine Performance.
- Hard Starting.
- Stalling.
- Random Misfire or Rough Idle.
- Fuel System Part Failures.
How often should diesel fuel filter be changed?
every 10,000 to 25,000 miles
Where are the fuel filters on a diesel engine?
Why is filtration important in a diesel engine?
Diesel fuel pumps, injectors and nozzles all are manufactured to extremely close tolerances, often measured in just a few microns. Abrasive particles in the fuel can easily damage these components and others leading to poor starting, increased fuel consumption, reduced engine power and ultimately component failure.
What happens if your diesel fuel filter is blocked?
Today’s diesel engines run at very fine tolerances and extremely high fuel pressures. As a result, any blockages in the filter can lead to the fuel not reaching the engine in sufficient quantities, which will result in very poor performance, or even prevent the engine from starting.
Why do you need a second diesel filter?
It does this by adding a second fuel filter to the system. But removes different sized particles to the factory system. Another benefit of a secondary diesel filter is it removes the water from the fuel into a visible bowl. This doubles up with the factory filter that also removes water.