Honda Civic Service Manual: Engine Oil/Air Separator Removal and Installation (R18Z1)

NOTE: Set the wiper arms to the auto-stop position before removal.

1.

Remove the cowl top wiper covers (A).

2.

Remove the wiper arms (B).

1.

Remove the side cowl cover (A).

2.

The left side is shown; repeat on the right side.

1.

Remove the center cowl cover (A).

2.

Disconnect the windshield washer tube (B).

3.

If necessary, remove the hood rear seal (C).

1.

Remove the under cowl panel (A).

1.

Remove the fuel fill cap to relieve the pressure in the fuel tank.

NOTE: For specific operations, refer to the user's manual that came with the Honda Diagnostic System (HDS). Make sure the HDS is loaded with the latest software.

1.

Connect the HDS to the data link connector (DLC) (A) located under the driver's side of the dashboard.

2.

Turn the ignition switch to ON (II).

3.

Make sure the HDS communicates with the vehicle. If it does not communicate, go to the DLC circuit troubleshooting.

1.

Turn the ignition switch to ON (II).

2.

From the INSPECTION MENU of the HDS, select Fuel Pump OFF, then start the engine, and let it idle until it stalls.

NOTE:

3.

Turn the ignition switch to LOCK (0).

1.

Make sure the ignition switch is in LOCK (0).

2.

Disconnect and isolate the negative cable and battery sensor (A) from the battery.

NOTE: Always disconnect the negative side first.

3.

Disconnect the positive cable (B) from the battery.

1.

Remove the quick-connect fitting cover (A).

2.

Check the fuel quick-connect fitting for dirt, and clean it if needed.

3.

Place a rag or shop towel over the quick-connect fitting (A).

4.

Disconnect the quick-connect fitting: Hold the connector (A) with one hand, and squeeze the retainer tabs (B) with the other hand to release them from the locking tabs (C). Pull the connector off.

NOTE:

1.

Disconnect the intake air duct (A).

2.

Remove the air cleaner (B).

3.

Remove the harness clamp (C).

1.

Remove the intake air duct.

1.

Remove the throttle body without disconnecting the hoses.

1.

Disconnect the EVAP canister hose (A), the brake booster vacuum hose (B), and the PCV hose (C).

2.

Remove the heater hose clamp bracket.

3.

Remove the intake manifold bracket.

4.

Disconnect the connectors (A).

5.

Remove the harness clamps.

6.

Remove the intake manifold assembly.

1.

Remove the harness clamp (A) and the oil/air separator (B).

1.

Clean and dry the oil/air separator mating surfaces, the bolts, and the bolt holes.

2.

Apply liquid gasket (P/N 08718-0004 or 08718-0009) to the engine block mating surface of the oil/air separator and to the inner threads of the bolt holes. Install the component within 5 minutes of applying the liquid gasket.

NOTE:

3.

Install the oil/air separator (A).

NOTE:

4.

Install the harness clamp (B).

1.

Install the intake manifold assembly (A) with new gaskets (B).

2.

Tighten the bolts/nuts in a crisscross pattern in three steps, beginning with the inner bolt.

3.

Install the connectors (A).

4.

Connect the harness clamps.

5.

Install the intake manifold bracket.

6.

Install the heater hose clamp bracket.

7.

Connect the EVAP canister hose (A), the brake booster vacuum hose (B), and the PCV hose (C).

1.

Install the throttle body (A) with new O-ring (B).

1.

Install the intake air duct.

1.

Install the harness clamp (A).

2.

Install the air cleaner (B).

3.

Connect the intake air duct (C).

1.

Connect the fuel feed hose.

1.

Install the under cowl panel (A).

1.

If necessary, install the hood rear seal (A).

2.

Connect the windshield washer tube (B).

3.

Install the center cowl cover (C).

1.

Install the side cowl cover (A).

2.

The left side is shown; repeat on the right side.

NOTE: Set the wiper arms to the auto-stop position before installation.

1.

Install the wiper arms (A).

2.

Install the cowl top wiper covers (B).

1.

Install the fuel fill cap.

NOTE: If the battery performs abnormally, test the battery.

1.

Clean the battery terminals.

2.

Connect the positive cable (A) to the battery.

NOTE: Always connect the positive side first.

3.

Connect the negative cable and battery sensor (B) to the battery.

4.

Apply multipurpose grease to the terminals to prevent corrosion.

1.

Connect the HDS to the data link connector (DLC) (A) located under the driver's side of the dashboard.

2.

Turn the ignition switch to ON (II).

3.

Make sure the HDS communicates with the vehicle. If it does not communicate, go to the DLC circuit troubleshooting.

1.

From the INSPECTION MENU of the HDS, select Fuel Pump ON.

NOTE: Pending or Confirmed DTC may be set during this procedure. Check for DTCs, and clear them as needed.

2.

Turn the ignition switch to LOCK (0).

1.

Turn the ignition switch to ON (II) (but do not operate the starter motor). The fuel pump runs for about 2 seconds, and fuel pressure rises. Repeat this two or three times, then make sure there are no fuel leaks.

1.

After installation, check that all tubes, hoses, and connectors are installed correctly.