An air cleaner is used to keep airborne dirt and dust out of the air flowing through the engine. Proper maintenance is vital, as a clogged element will undesirably enrichen the fuel mixture, restrict air flow and power, and allow excessive contamination of the oil with abrasives.
All models covered in this guide are equipped with a disposable, paper cartridge air cleaner element. The filter should be checked at every tune-up (sooner if the car is operated in a dusty area). Loose dust can sometimes be removed by striking the filter against a hard surface several times or by blowing through it with compressed air. The filter should be replaced every 24,000 miles (30,000 miles, 1979 and later).
REMOVAL & INSTALLATION
- Remove the wingnuts, if applicable, and/or lift off the thumb latches.
- Lift off the housing cover, then remove the filter element.
- Wipe out the inside of the housing with a clean rag or paper towel.
- Install the air cleaner element.
- Seat the top cover and refasten it with the wingnuts and/or thumb latches.
Fuel injected models (810, Maxima, and 1980-81 200SX) utilize a flat, cartridge type air cleaner element. Although removal and installation procedures for these models are the same as for those with round air cleaners, make sure that the word UP is facing up when you install the filter element.