Toyota Pick-ups/Land Cruiser/4Runner 1989-1996

Air Filter



See Figures 1, 2 and 3

The air filter element should be replaced at the recommended intervals shown in the Maintenance Intervals chart later in this section. If your truck is operated under severely dusty conditions or severe operating conditions, more frequent changes will certainly be necessary. Inspect the element at least twice a year. Early spring and early fall are always good times for inspection. Remove the element and check for any perforations or tears in the filter. Check the cleaner housing for signs of dirt or dust that may have leaked through the filter element or in through the snorkel tube. Shine a bright light on one side of the element and look through the filter at the light. If no glow of light can be seen through the element material, replace the filter. If holes in the filter element are apparent or signs of dirt seepage through the filter are evident, replace the filter.

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Fig. Fig. 1: Release the clips securing the lid ...

  1. Disconnect all hoses, ducts and vacuum tubes which would block removal of the top of the air cleaner assembly.
  3. For round air cleaner housings, remove the top cover wing nut and grommet, if present. Most models will also use three or four side clips to further secure the top of the assembly. Pull the wire tab and release the clip. Remove the cover and lift out the filter element.
  5. On fuel injected engines, simply release the clips holding the top of the air box and lift the lid. Note that some of these clips may be in close quarters against bodywork or other components; don't pry or force the clips.

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Fig. Fig. 2: ... then lift the lid and remove the filter

  1. Remove the filter element. Clean or replace as needed. Wipe clean all surfaces of the air cleaner housing and cover. Check the condition of the mounting gasket and replace it if it appears worn or broken.

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Fig. Fig. 3: Exploded view of a common air cleaner assembly found on Toyota trucks

To install:
  1. Reposition the filter element in the case and install the cover, being careful not to overtighten the wingnut(s). On round-style cleaners (carbureted engines), be certain that the arrows on the cover lid and the snorkel match up properly. The lid of the air cleaner housing must be correctly installed and fit snugly. Air leaks around the top can cause air to bypass the filter and allow dirt into the engine.

Filter elements on fuel injected engines have a TOP and BOTTOM side, be sure they are inserted correctly.

  1. Connect all hoses, duct work and vacuum lines.

Never operate the engine without the air filter element in place.