Honda Civic. Manual — part 404

Fig. 19: Identifying Cylinder Head Gasket And Dowel Pins

3. Install the new cylinder head gasket (B) and dowel pins (C) on the engine

block. Always use a new cylinder head gasket.

4. Set the crankshaft to top dead center (TDC). Align the TDC mark (A) on the

crankshaft sprocket with the pointer (B) on the engine block.

Fig. 20: Aligning TDC Mark On Crankshaft Sprocket With Pointer

5. Set the camshaft TDC. The "UP" mark (A) on the camshaft sprocket should be

at the top, and the TDC grooves (B) on the camshaft sprocket should line up
with the top edge of the head.

2008 Honda Civic GX

2006-08 ENGINE Cylinder Head - Civic GX

Fig. 21: Identifying Camshaft TDC Up Mark On Camshaft Sprocket

6. Install the cylinder head on the block.
7. Measure the diameter of each cylinder head bolt at point A and point B.

Fig. 22: Measuring Diameter Of Cylinder Head Bolt

8. If either diameter is less than 10.6 mm (0.42 in.), replace the cylinder head

bolt.

9. Apply new engine oil to the threads and under the bolt heads of all cylinder

head bolts.

10. Tighten the cylinder head bolts in sequence to 39 N.m (4.0 kgf-m, 29 Ibf-ft).

Use a beam-type torque wrench. When using a preset-type torque wrench, be

2008 Honda Civic GX

2006-08 ENGINE Cylinder Head - Civic GX

sure to tighten slowly and do not overtighten. If a bolt makes any noise while
you are torquing it, loosen the bolt and retighten it from the first step.

Fig. 23: Identifying Tightening Sequence Of Cylinder Head Bolts

11. After torquing, tighten all cylinder head bolts in two steps (90° per step). If you

are using a new cylinder head bolt, tighten the bolt an extra 60°.

Fig. 24: Identifying Cylinder Head Bolt Tightening Steps

12. Install the cam chain, refer to the CAM CHAIN INSTALLATION .
13. Adjust the valve clearance, refer to the VALVE CLEARANCE

ADJUSTMENT .

NOTE:

Remove the cylinder head bolt if you tightened it
beyond the specified angle, and go back to step 7 of the
procedure. Do not loosen it back to the specified angle.

2008 Honda Civic GX

2006-08 ENGINE Cylinder Head - Civic GX

14. Install the cylinder head cover, refer to the CYLINDER HEAD COVER

INSTALLATION .

15. Install the thermostat housing (see INSTALLATION ).
16. Install the three way catalytic converter (TWC) (see CATALYTIC

CONVERTER REMOVAL/INSTALLATION ).

17. Connect the engine wire harness connectors, and install the wire harness

clamps to the cylinder head.

Four fuel injector connectors

Engine coolant temperature (ECT) sensor 1 connector

Air fuel ratio (A/F) sensor connector

Secondary heated oxygen sensor (secondary HO2S) connector

Rocker arm oil control solenoid connector

Rocker arm oil pressure switch connector

18. Install the upper radiator hose (A), heater hose (B), and water bypass hose (C).

Fig. 25: Identifying Upper Radiator Hose, Heater Hose And Water Bypass
Hose

19. Install the harness holder (A) on the cylinder head, then Install the air cleaner

housing bracket (B).

2008 Honda Civic GX

2006-08 ENGINE Cylinder Head - Civic GX