Engine - Air Filter Replacement Precautions

Date: December 2, 2008

Order No.: S-B-09.10/30

Group: 09

SUBJECT:
MY- All, Models 164, 171, 203, 204, 209, 211, 216, 219, 221, 230, 251, and 463 (with Engine 272 or 273)

Installing Air Filters





An improperly installed air filter assembly can cause the air mass sensor to receive turbulent, instead of laminar air flow due to air leakage at the sealing ring (4c, Figure 1). This in turn can cause 0745, 0749, 2091, or 2095 ME fault codes.

A. Procedure for Installing Air Filters

1. Apply lubricant to the retaining clip (4b, Figure 1) and the sealing ring (4c, Figure 1).

NOTE:
Apply only a thin layer of lubricant to the ring to avoid getting any on the HFM-SFI (hot film air mass sensor fuel injection system).





2. Fit the air filter housing (4, Figure 2) on the HFM-SFI while checking that the sealing ring (4c, Figure 1) is correctly positioned.

3. Fit retaining clips (4b, Figure 1) on the support (4a, Figure 1). If necessary, adjust by positioning retaining clips (4b, Figure 1) precisely.

4. Before pressing the raining clips in, ensure that the air filter housing is correctly set on the HFM-SFI.

NOTE:
Check that the sealing ring (4c, Figure 1) is correctly positioned and realign it if necessary. The housing may have to be shifted slightly toward the radiator. Check that there is no gap between the air filter housing (4, Figure 2) and the ME-SFI [ME] (motor electronic sequential multiport fuel injection/ignition system) control unit at the firewall end and that they are both parallel and aligned evenly.





5. Press the air filter housing (4, Figure 3) evenly into the support (4a, Figure 3) without applying excessive force. If unsuccessful, start again at step 2.

7. Install the hose (3, Figure 2) for the air pump at the air filter housing (4, Figure 3) so that the arrows on the hose (3, Figure 2) and the air filter housing (4, Figure 3) point towards each other.

8. Install the left and right intake air ducts (2, Figure 3). Inspecting for any cracks, do not pull on the braided hose. Pull or press the vinyl ring only. Sealing rings must make contact over the entire surface.

9. Fit the front engine cover on the vehicle.





Parts Information