Honda Civic. Manual — part 680

5. Apply silicone grease (PARKER CHRISTO-LUBE) to a new O-ring (C), and

carefully install it into its proper position (see FUEL TANK SCRAPPING ).

6. Install the parts in the reverse order of removal.
7. Do the leak inspection procedure (see LEAK INSPECTION ).

FUEL FILTER A ELEMENT REPLACEMENT

1. Relieve fuel pressure between the engine and the manual shut-off valve (see

FUEL PRESSURE RELIEVING ).

2. Lift the vehicle, and support it with jackstands.
3. Remove the under-floor cover (see step 3 on page 11-147).
4. Remove the fuel filter A housing (A), and replace the fuel filter A element (B).

Fig. 101: Identifying Fuel Filter A Housing, Fuel Filter A Element And O-
Ring

5. Apply silicone grease (PARKER CHRISTO-LUBE) to a new O-ring (C) and

WARNING:

Compressed natural gas is flammable and highly
explosive. You could be killed or seriously injured if
leaking natural gas is ignited.
Stop the engine, and keep heat, sparks and flames
away.

2008 Honda Civic GX

2006-08 ENGINE PERFORMANCE Fuel Supply System - Civic GX

carefully install it into its proper position (see FUEL TANK SCRAPPING ).

6. Install the parts in the reverse order of removal.
7. Do the leak inspection procedure (see LEAK INSPECTION ).

FUEL FILTER A REPLACEMENT

1. Relieve fuel pressure between the engine and the manual shut-off valve (see

FUEL PRESSURE RELIEVING ).

2. Lift the vehicle, and support it with jackstands.
3. Remove the under-floor cover (see step 3 on page 11-147).
4. Remove the fuel lines (B), stay (C), and bolts (D). Replace fuel filter A. Make

sure the arrow is pointing towards the engine.

Fig. 102: Exploded View Of Fuel Filter

WARNING:

Compressed natural gas is flammable and highly
explosive. You could be killed or seriously injured if
leaking natural gas is ignited.
Stop the engine, and keep heat, sparks and flames
away.

NOTE:

Always use two wrenches when removing or installing
fuel line nuts (see FUEL LINE INSPECTION ).

2008 Honda Civic GX

2006-08 ENGINE PERFORMANCE Fuel Supply System - Civic GX

5. Apply silicone grease (PARKER CHRISTO-LUBE) to the new O-rings (E),

and carefully install them into their proper positions (see FUEL TANK
SCRAPPING ).

6. Install the parts in the reverse order of removal.

7. Do the leak inspection procedure (see LEAK INSPECTION ).

FUEL FILTER B ELEMENT REPLACEMENT

1. Relieve fuel pressure between the engine and the manual shut-off valve (see

FUEL PRESSURE RELIEVING ).

2. Lift the vehicle, and support it with jackstands.
3. Remove the fuel filter B housing (A), and replace the fuel filter B element (B).

Fig. 103: Identifying Fuel Filter B Housing, Element And O-Ring

NOTE:

When assembling the stay and fuel filter A, make sure
to assembly them that the "IN" mark (F) is visible.

WARNING:

Compressed natural gas is flammable and highly
explosive. You could be killed or seriously injured if
leaking natural gas is ignited.
Stop the engine, and keep heat, sparks, and flames
away.

2008 Honda Civic GX

2006-08 ENGINE PERFORMANCE Fuel Supply System - Civic GX

4. Apply silicone grease (Shinetsu silicone GR 10M) to a new O-ring (C) and

carefully install it into its proper position (see FUEL TANK SCRAPPING ).

5. Install the parts in the reverse order of removal.

6. Do the leak inspection procedure (see LEAK INSPECTION ).

FUEL JOINT BLOCK REPLACEMENT

1. Remove the fuel tank (see FUEL TANK REMOVAL/INSTALLATION ).
2. Remove the fuel pipe duct (A), then remove the fuel pipes (B) from the fuel

tank, and disconnect the connector (C).

NOTE:

If the fuel filter B housing is rusty or damaged, replace
the fuel filter B housing and seal (D).

WARNING:

Compressed natural gas is flammable and highly
explosive. You could be killed or seriously injured if
leaking natural gas is ignited.
Stop the engine, and keep heat, sparks, and flames
away.

NOTE:

Always use two wrenches when removing or installing
fuel pipe nuts (see FUEL LINE INSPECTION ).

2008 Honda Civic GX

2006-08 ENGINE PERFORMANCE Fuel Supply System - Civic GX