An air cleaner is used to keep airborne dirt and dust out of the air flowing through the engine. This material, if allowed to enter the engine, would form an abrasive compound in conjunction with the engine oil and drastically shorten engine life. For this reason, you should never run the engine without the air cleaner in place except for a very brief period if required for trouble diagnosis. You should also be sure to use the proper replacement part to avoid poor fit and consequent air leakage.
Proper maintenance is important since a clogged air filter will allow an ever decreasing amount of air to enter the engine and, therefore, will increasingly enrichen the fuel/air mixture, causing poor fuel economy, a drastic increase in emissions and even serious damage to the catalytic converter system. The maximum maintenance interval on all models is 30,000 miles (48,000 km). Maximum efficiency is maintained by changing the filter more often. Diesel engines are particularly sensitive to partly clogged air filters and will lose performance if not well maintained. In all cases the air cleaner element must be replaced; it cannot be cleaned.
See Figures 1 through 94-Cylinder Gasoline Engines
- Remove the wing nut with your fingers. Pliers should be used only if it has been tightened excessively.
- Disconnect the vacuum hose connected to the top of the air cleaner assembly.
- Unsnap and then disconnect the three clips from the upper body.
- Remove the top of the air cleaner and remove the cartridge.
- Wipe out the filter housing with a clean rag.
- Install the new cartridge squarely so that it seats properly. Install the air cleaner lid over the wing nut stud, aligning the arrow on the top with the arrow on the air intake tube. Install the wing nut finger-tight.
- Hook, then lock all clips and hoses.
- Unsnap the three finger clips and unhook the lower ends. Pull the top of the air cleaner upward or toward you and away from the air cleaner body. The flex hose will give you enough freedom of motion to permit you to do this without disconnecting it from the air cleaner top.
- Pull the filter cartridge out of the air cleaner body.
- Install the new filter so that it seats properly in the air cleaner body. Then, install the top squarely on the lower body, hook the clips and lock them. If any of the clips are hard to lock, recheck the position of the top on the lower body. If it is not positioned properly, it will not seal effectively and the clips may be damaged.
- Loosen the hose clamp that connects the intake flexible hose to the air cleaner cover. Separate the hose from the cover.
- Unfasten the air flow sensor multi-connectors.
- Release the air cleaner cover clips. Move the flexible air intake out of the way to allow you to remove the air cleaner cover. Remove the air cleaner cover carefully because it contains the air flow sensor.
- Remove the air cleaner element from the housing and wipe the housing clean with a rag.
- Place the new filter element into the housing making sure that it seats properly.
- Replace the air cleaner cover and plug the air flow sensor multi-connectors in. Connect the air intake hose to the air cleaner cover and tighten the hose clamp.