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Air Filter For Diesel Engines

In order to run, the engine needs a precise mixture of fuel and air. When outside air is drawn into the engine, the air filter prevents harmful dirt and debris from entering the system. Diesel air filters are generally more robust than their gasoline counterparts because they must filter a larger volume of air.

Symptoms of Wear or Failure

  • Poor gas mileage
  • Reduced engine power

Related Repair Advice

  • The air filter should be inspected, cleaned, and/or replaced every 12,000 to 15,000 miles
  • When replacing the air filter, dirt and debris should be removed from the air filter housing
  • Diesel air filters can be more expensive than their gas engine counterparts due to the extra filtering capacity required by a diesel engine
  • If oil has contaminated the air filter, it should be replaced; oil contamination may indicate a problem with the PCV system
  • Air filters will need to be replaced more often in vehicles driven in dusty and sandy areas
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