Toyota Corolla DIY

This DIY was done using a K&N filter with K&N products. The process should be the same for all filters, EXCEPT for the dry flow filters in which case you should use this DIY. If you have a different filter use whatever products they recommend that you use.

Items needed:
- Dirty Air Filter
- Air Filter Cleaner
- Air Filter Oil

1. Remove dirty filter from intake.

2. Spray cleaner on both sides of filter until it completely saturates the material. Allow cleaner to soak into both sides of filter for at least 10 minutes to loosen dirt. DO NOT LET CLEANER DRY ON FILTER!!!

3. Rinse off the filter with cool water. Use only low pressure water. Run the water from the inside out to allow the dirt to leave the filter rather than get pushed further inside. Run water from the inside running up and down the pleats. Completely rinse the filter until all traces of the cleaner is gone.

If filter was very dirty you may need to repeat Steps 2 and 3 until filter is clean. (I had to do this process twice on mine).

If there are still small spots of dirt on the filter just spray each spot with cleaner, allow a few minutes to soak and re-rinse. You do not have to remove every single little piece of dirt. Only use this method to clean off debris, if you use anything else you could damage the filter.

4. After rinsing, gently shake off excess water. Allow filter to dry naturally. DO NOT OIL UNTIL FILTER IS COMPLETELY DRY!!!

5. Apply oil to filter sparingly to the outside of the filter only. Over oiling may interfere with the performance of the filter. It could also lead you to having to replace the MAF. It is better to have to apply several lighter coats of oil than 1 or 2 heavy ones.

6. Wait 20 minutes for the oil to be absorbed into the filter. Inspect the filter, if there are any areas that are lighter than others reapply like before to that area.

If there is oil draining or dripping from the filter after 20 minutes you have over oiled it. If you over oiled it you must re-service the filter starting at Step 2.

7. Reinstall filter back on to intake. Take for a test drive.

If CEL comes on, check intake and ensure that you put everything back on properly. If it was re-installed properly, then you may have over oiled it. Clean your MAF sensor. Disconnect battery for 30 minutes then reconnect. If CEL comes back on get it read, you may have to re-service the filter.

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