1. If four numbers (1 to 4) are printed around the outside of the filter, use the following procedure to tighten the filter.
   - Spin the filter on until its seal lightly seats against the block, and note which number is at the bottom.
   - Tighten the filter by turning it clockwise three numbers from the one you noted. For example, if number 2 is at the bottom when the seal is seated, tighten the filter until the number 1 comes around the bottom.

Number when rubber seal is seated | 1 | 2 | 3 | 4
Number after tightening | 4 | 1 | 2 | 3

1. After installation, fill the engine with oil up to the specified level, run the engine for more than 3 minutes, then check for oil leakage.