Airaid 400-249 Installation Instructions

Installation Instructions

For Part Numbers:

400-249 700-420 Airaid Oiled Media Filter
401-249 701-420 SynthaMax Dry Media Filter - Red
402-249 702-420 SynthaMax Dry Media Filter - Black
403-249 703-420 SynthaMax Dry Media Filter - Blue

1997-2004 Ford Expedition
1997-2003 F-150 4.6L, 5.4L V8
2004 Ford F-150 Heritage 4.6L, 5.4L V8

D.

B.

A.

C.

Component Identification

1. Airaid Premium Filter 1

2. Airaid Intake Tube 1

3. MAF Panel 1

4. Bottom Panel 1

5. Panel Extension 1

6. MAF Bracket 1

7. Urethane Hump Hose 1

8. Urethane Reducer Hump Hose 1

9. 5/8” x 18” Breather Hose 1

10. 3/4” x 12” L-Hose 1

11. Weather Strip 23” 1

12. 6-32 x 5/16” Phillips Head Screw 9

13. #6 Flat Washer 9

14. 6-32 Kep Nut 9

15. 1/4-20 x 7/8” Hex Head Bolt 6

16. 1/4” Flat Washer 4

17. 1/4” Nylock Nut 6

18. MAF Gasket 1

19. MAF Backing Plate 1

20. #52 Hose Clamp 1

21. #60 Hose Clamp 3

22. #19 Speed Clamp 2

23. #22 Speed Clamp 2

24. Rubber Grommet 1

1. Disconnect the negative battery cable.
Using a 10mm socket, remove the three bolts that secure
the beauty cover over the throttlebody. Remove the cov­er and save these parts for reinstallation in step #16.

MAF Connector

A.

4.Unlatch the clamp on the canister to separate the two
halves. Once separated, remove the factory air filter.
A) Next, slide the lar ge r ound plastic Mass Air Flow
(MAF) sensor a dapter plate fr om the canist er . To do
this, slide the wires thru the rubber grommet to gain
access to the MAF sensor wiring connector. Now dis­connect the MAF sensor wiring harness, and remove the
MAF sensor housing and adapter plate. Remove the
remaining half of the canister from the vehicle.

2. A) Very carefully, using a pulling cir cular mot ion,
remove the air intake temperature sensor from the air
intake tube. B) Disconnect the upper hard plastic tube
from the air intake tube. C) Disconnect the crankcase
breather at the intake tube and the valve cover, and re­move it from the vehicle. D) Loosen two hose clamps and
remove the air intake tube from the vehicle.

MAF Housing

5. Remove the bolts that secure the MAF sensor housing

to the adapter. Separate the adapter plate from the MAF
sensor housing and save the sensor and housing for rein­stallation in step #7.

3. Lift straight up on the outlet side of the air filter canis­ter to remove it from it’s locating grommets. Next, pull
it towards the engine to dislodge it from the inner fender
well.

6. Assemble the MAF panel (#3), and bottom panel (#4)
as shown using four 6-32 screws (#12), four flat washers
(#13), and four Kep nuts (#14) as shown.

Rubber Gasket

MAF Connector

7. Attach the MAF bracket (#6), rubber gasket (#18),

and factory MAF sensor housing to the Cold Air Dam
(CAD) using four 1/4-20x7/8” hex bolts (#15), and 1/4”
Nylock nuts (#17), as shown. Make sure that the MAF
sensor connector is on the bottom when assembly is
complete. Refer to the line drawing above for reference.

8. Using a 10mm socket, remove and save the bolt that
secures the radiator overflow tank to the driver side inner
fender well.

9. Remove the two grommets that held the air filter can­ister in place. They will not be reused.

6mm Bolt

MAF Harness

10. Install the CAD assembly into the vehicle using two

1/4-20x7/8” bolts (#15), four 1/4” flat washers (#16),
one MAF backing plate (#19), and two 1/4” nylock nuts
(#17). Leave the two bolts slightly loose for now for
final adjustment. Refer to the line drawing on page 1 for
reference. Next, reinstall the 6mm bolt thru the CAD,
radiator overflow tank, and into the fender well. Recon­nect the MAF sensor wiring harness.

Grommet

MAF Harness

13. Install the supplied rubber grommet (#24) into the

Airaid Intake Tube (#2) as shown.

11. Install the hump hose (#7) onto the MAF sensor
housing as shown using two #60 hose clamps (#21).
Tighten only the clamp on the MAF sensor housing at
this time.

14. Install the Airaid Intake Tube into the hump hose on
the MAF, and then into the hump hose on the throttle­body. Adjust for fit, and then tighten the hose clamps.
Connect the 5/8”x18” breather hose (#9) between the
valve cover and the intake tube as shown using two #19
speed clamps (#22). Now carefully reinstall the intake
air temperature sensor into the grommet from step #13.
Now that everything is in place, tighten the three bolts
that secure the CAD to the vehicle. 5.4L engines: Meas-
ure, and then cut the 3/4”x12” L-hose (#10) and then
install it between the hard plastic hose and the intake
tube as shown using two #22 speed clamps (#23).

12. Install the small end of the reducing hump hose (#8)
onto the throttlebody and tighten the #52 hose clamp
(#20). Next, install the remaining #60 hose clamp (#21)
on the large end of the hump hose leaving it loose for
now.

15. 4.6L engines: Rotate the resonator box 90
degrees to provide clearance for the 3/4 x 12” L­hose (#7). Install the 3/4”x12” L-hose (#10) onto
the Airaid Intake tube and the resonator box and
secure it using the two #22 speed clamps (#23).

18. Double check your work!

Make sure there is no foreign material in the
intake path. Make sure all clamps, hoses, bolts,
connectors, and screws are tight.

Reconnect the negative battery cable!

16. Reinstall the beauty cover using the 3 factory bolts.

Install the Airaid Premium Filter (#1) as shown, and
tighten the hose clamp.

If your vehicle does not have a hood mat, skip to Step
#17.

Install the weatherstrip (#11) onto the top of the CAD as
shown.

Full color instructions can be viewed on our web site at Airaid.com. Use the Product Search function to find your part number, and click View Details.

Thank you for purchasing the Airaid Intake System. Contact Airaid @ [phone] 8:00 AM - 5:00 PM MST weekdays for questions regarding fit or instructions
that are not clear to you. Your Airaid Intake System was carefully inspected and packaged. Check that no parts are missing, or were damaged during shipping. If any parts are
missing, contact Airaid. The air filter element is protected from direct exposure to water and debris; care should be taken not to drive through deep water. WATER INGESTION
IS THE DRIVERS RESPONSIBILTY! The air filter is reusable and should be cleaned periodically.

17. If your vehicle does not have a hood mat install the
optional CAD height extender (#5) using five 6-32
screws (#12), flat washers (#13), and kep nuts (#14) as
shown. Install the weatherstrip (#11) onto the top of the
CAD as shown.

FILTER IDENTIFICATION

700-420 Airaid Oiled Media 701-420 Airaid SynthaMax Dry Media - Red

702-420 Airaid SynthaMax Dry Media - Black 703-420 Airaid SynthaMax Dry Media - Blue

For your Oiled media filter we suggest

using the AIRAID Filter Tune-Up Kit!

Synthamax Air Filters do not require oil.
Service air filter as needed by cleaning
with common non-petroleum all-purpose
household cleaner and water. Simple
Green®, Formula 409® or equivalent
works great. Apply cleaner to outside of
air filter and allow to soak. Then flush fil­ter clean from the inside out with a garden
hose and repeat steps if necessary. Do not

P/N 790-551 Aerosol Spray
P/N 790-550 Squeeze Spray

Airaid Filter Co. 2688 E Rose Garden Ln. Phoenix AZ 85050 [phone] [e-mail] www.airaid.com

apply high pressure water or air to clean
filter. Allow filter to air dry and reinstall.

REV.10.24.13