Engine AirIntake Filter

The stock AirIntake FilterHousing is in the RightFore corner of the engine compartment. Pictured & listed below are several PanelStyle PaperElement Filters, Width \* Length \* Height noted, that fit in this housing.

AirIntake Filter Housing UpperCover
AirIntake Filter Ford# fa1658
\* FactoryOEAirIntake Filter Wix# wa6734
\* Prefered Largest PaperElement
* Wix# wa6734.........9i055W\*7i598L\*2i441H = Largest Paper Element + Hi Availability
* Fram# ca10354.....9i055W\*7i598L\*2i441H = Largest Paper Element
* Mahle# Lx742........9i094W\*7i598L\*2i441H = Largest Paper Element
* Wix# 46253............8i791W\*7i575L\*2i295H
* Fram# ca9563.......9i062W\*7i880L\*2i285H
* Mann# c24123.......9i094W\*7i638L\*2i283H
* Ford# fa1658.........8i790W\*7i580L\*2i280H = FactoryOE
* Ford# fa1744.........8i970W\*7i740L\*2i260H
* SuperTech# 1355...8i970W\*7i740L\*2i185H = Lo Cost + Hi Availability

Tools are not required to open the FilterHousing; Filter should be removed+inspected about every 6mths & replaced if dirty, more often for high usage or when road conditions are notably dusty\muddy\snowy:

* Shutoff Engine, then disconnect MAssFlowSensor & PositiveCaseVentTube from the AirIntake Duct.
* Open the 2 QuickLatches on the inboard side of Filter Housing UpperCover.
* Slide UpperCover ~1inch sideways to release it, slightly compressing the Duct accordion.
* Lift UpperCover to reveal the Filter; a BungyCord is handy to hold the UpperCover out of the way.
* Remove+inspect the Filter; replace with a new Filter if visibly dirty.
* CompressedAir <60psi BackBlow is a temporary fix for a dirty Filter until a new Filter is available.
* Remove any dirt or debris from the Filter Housing LowerBody; RodentNests are often found here.
* Reverse above procedures for reassembly; don't forget to reconnect both MAFSensor & PCVTube.

## Housing LowerBody Modification

In 2020May, I began experimenting with the FilterHousing LowerBody, shown below: removed InletRestrictor & finally cutting away most of the box, eventually leaving only the basic BoxFrame & MountingStabs. Original logic for this "Extreme CheeseBox Mod": remove a potential RodentNest, minimize resistance to AirFlow, stay compatible with stock Filters, & if unsatisfactory easily reverted to stock unmodified Box, all at near $0 cost.

2021Nov Update+Conclusion: after running this mod for over a year, it made more problems than it resolved: IntakeAir Noise was much louder over 3500rpms & Temp ran ~10f hotter, Power+Mileage was NOT improved; an original stock unmodified FilterHousing from a JunkYard ~$30 has been re-installed; LESSON LEARNED !!

AirIntake Filter Housing LowerBody
\* Original With AirFlow Restricted
AirIntake Filter Housing LowerBody
\* Modified With AirFlow Maximized

## Links To Related Info

Thanks go to the brave souls who've preceded me in similar adventures & freely shared their experience:

http://youtu.be/pxXr6W5bZtg?t=0
http://youtu.be/mBn5a\_\_c-yI?t=39
http://youtu.be/RdXVxbd59es?t=36
http://youtu.be/C9RYoL0mLyw?t=1
http://youtu.be/MSjQPDT-C8s?t=1
http://youtu.be/BDV7MyqQvSA?t=2
http://youtu.be/Z8FaQQ4Tww8?t=6
http://youtu.be/CpxHe7sZwsE?t=0
http://www.ranger-forums.com/engine-drivetrain-122/how-airbox-mod-132753
http://www.ranger-forums.com/engine-drivetrain-122/how-air-silencer-removal-10455
https://www.explorerforum.com/forums/threads/3rd-gen-air-box-mod.278734
https://www.explorerforum.com/forums/threads/some-mods-today-swiss-cheese-silencer-silencer-panel-and-k-n-sotp-yes.434780/page-2