Honda Civic Service Manual: VTC Actuator Inspection (K24Z7)

1.

Disconnect the intake air duct (A) and the intake air pipe (B).

2.

Remove the harness clamp (C).

3.

Remove the air cleaner (D).

1.

Raise the vehicle on a lift, and make sure it is securely supported.

1.

Remove the right front wheel.

1.

Wait until the engine is cool, then carefully remove the radiator cap.

1.

Loosen the drain plug (A), and drain the coolant.

1.

Move the auto-tensioner (A) using the belt tension release tool in the direction of the arrow to relieve tension from the drive belt, then remove the drive belt.

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 engine cover.

1.

Remove the ignition coil cover.

1.

Remove the ignition coils.

1.

Remove the cylinder head cover.

1.

Turn the crankshaft so its white mark (A) lines up with the pointer (B).

NOTE: The other pointer (C) is not used.

1.

Set the No. 1 piston at top dead center (TDC). The punch mark (A) on the VTC actuator and the punch mark (B) on the exhaust camshaft sprocket should be at the top. Align the TDC marks (C) on the VTC actuator and the exhaust camshaft sprocket.

1.

Remove the harness clamp.

1.

Remove the ground cable (A).

2.

Remove the VTC oil control solenoid valve (B).

1.

Hold the pulley with the holder handle (A) and the crankshaft pulley holder (B).

2.

Remove the bolt with a socket, 19 mm (C) and a breaker bar, then remove the crankshaft pulley.

1.

Lift and support the engine with a jack and a wood block under the oil pan.

1.

Remove the upper torque rod.

1.

Remove the ground cable (A), the side engine mount bracket (B), and the side engine mount (C).

1.

Remove the side engine mount bracket.

1.

Remove the cam chain case (A) and the spacer (B).

1.

Loosely install the crankshaft pulley.

2.

Turn the crankshaft counterclockwise to compress the auto-tensioner.

3.

Rotate the crankshaft counterclockwise to align the holes on the lock (A) and the auto-tensioner (B), then insert a 1.2 mm (3/64 in) diameter pin (C) into the holes. Turn the crankshaft clockwise to secure the pin.

NOTE: If the holes in the lock and the auto-tensioner do not align, continue to rotating the crankshaft counterclockwise until the holes align, then install the pin.

4.

Remove the auto-tensioner.

1.

Remove cam chain guide B.

2.

Remove cam chain guide A and the tensioner arm (B).

1.

Remove the cam chain.

1.

Loosen the rocker arm and the adjusting screws (A).

2.

Remove the camshaft holder bolts. To prevent damaging the camshafts, loosen the bolts, in sequence, two turns at a time.

3.

Remove cam chain guide B , the camshaft holders (A).

1.

Check that the VTC actuator is locked by turning the VTC actuator counterclockwise. If it is not locked, turn the VTC actuator clockwise until it stops, then recheck it. If it is still not locked, replace the VTC actuator.

2.

Seal the retard holes (A) in the No. 1 camshaft journal with tape and a wire tie.

3.

Seal one of the advance holes (A) with tape.

4.

Apply air to the unsealed advance hole to release the lock.

5.

Check that the VTC actuator moves smoothly. If the VTC actuator does not move smoothly, replace the VTC actuator.

6.

Remove the wire tie, the tape, and the adhesive residue from the camshaft journal.

1.

Set the camshaft holders (A) and cam chain guide B in place.

2.

Tighten the bolts to the specified torque.

1.

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.

1.

Set the camshafts to TDC. The punch mark (A) on the VTC actuator and the punch mark (B) on the exhaust camshaft sprocket should be at the top. Align the TDC marks (C) on the VTC actuator and the exhaust camshaft sprocket.

1.

To hold the intake camshaft, insert a camshaft lock pin set (C) into the maintenance hole in CMP pulse plate A and through the No. 5 rocker shaft holder (D).

2.

To hold the exhaust camshaft, insert a camshaft lock pin set (C) into the maintenance hole in CMP pulse plate B and through the No. 5 rocker shaft holder (D).

3.

Install the cam chain on the crankshaft sprocket with the colored link plate (A) aligned with the mark (B) on the crankshaft sprocket.

4.

Install the cam chain on the VTC actuator and the exhaust camshaft sprocket with the punch marks (A) aligned with the center of the two colored link plates (B).

1.

Install cam chain guide A and the tensioner arm (B).

2.

Install cam chain guide B.

1.

Compress the auto-tensioner when replacing the cam chain. Remove the pin (A) from the auto-tensioner that was installed during removal. Turn the plate (B) counterclockwise, to release the lock, then press the rod (C), and set the first cam (D) to the first edge of the rack (E). Insert the 1.2 mm (3/64 in) diameter pin back into the holes (F).

NOTE: If the chain tensioner is not set up as described, the tensioner will be damaged.

2.

Install the auto-tensioner.

3.

Remove the pin from the auto-tensioner.

4.

Remove the camshaft lock pin set.

1.

Check the chain case oil seal for damage. If the oil seal is damaged, replace the chain case oil seal.

2.

Remove the old liquid gasket from the chain case mating surfaces, the bolts, and the bolt holes.

3.

Clean and dry the chain case mating surfaces.

4.

Apply liquid gasket (P/N 08718-0004 or 08718-0009) to the engine block mating surface of the chain case and to the inside edge of the threaded bolt holes. Install the component within 5 minutes of applying the liquid gasket.

5.

Apply liquid gasket (P/N 08718-0004 or 08718-0009) to the oil pan mating surface of the chain case, and to the inside edge of the threaded bolt holes. Install the component within 5 minutes of applying the liquid gasket.

NOTE:

1.

Install the side engine mount bracket (A), then tighten the side engine mount bracket mounting bolts.

1.

Install the new side engine mount mounting bolts (A) and the side engine mount bracket (B) using a nut and a new bolt, then loosely install the new side engine mount bracket mounting bolts and nut (C).

2.

Install the ground cable (D).

1.

Loosen the transmission mount bracket bolt and nuts (A).

1.

Loosen the lower torque rod mounting bolt (A).

1.

Tighten the side engine mount bracket mounting bolt and nut.

1.

Tighten the transmission mount bracket mounting bolt and nuts.

1.

Loosen the lower torque mount mounting bolt.

2.

Tighten the lower torque rod mount mounting bolts in the numbered sequence shown.

1.

Install the air cleaner (A).

2.

Install the harness clamp (B).

3.

Connect the intake air pipe (C) and the intake air duct (D).

1.

Install the upper torque rod using new bolts.

2.

Tighten the upper torque rod mounting bolts in the numbered sequence shown.

1.

Clean the crankshaft pulley (A), the crankshaft (B), the bolt (C), and the washer (D). Lubricate with new engine oil as shown.

2.

Install the crankshaft pulley, and hold the pulley with the holder handle (A) and the crankshaft pulley holder (B).

3.

Torque the bolt to 50 N·m (5.1 kgf·m, 37 lbf·ft) with a torque wrench and a socket, 19mm(C). Do not use an impact wrench. If the pulley bolt or crankshaft are new, torque the bolt to 177 N·m (18.0 kgf·m, 131 lbf·ft), then remove the bolt and torque it to 50 N·m (5.1 kgf·m, 37 lbf·ft).

4.

Tighten the pulley bolt an additional 90 °.

1.

Install the VTC oil control solenoid valve (A) with a new O-ring (B).

NOTE:

2.

Install the ground cable (C).

1.

Install the harness clamp.

1.

Set the No. 1 piston at top dead center (TDC). The punch mark (A) on the VTC actuator and the punch mark (B) on the exhaust camshaft sprocket should be at the top. Align the TDC marks (C) on the VTC actuator and the exhaust camshaft sprocket.

3.

Insert the feeler gauge (A) between the adjusting screw (B) and the end of the valve stem on the No.1 cylinder, and slide it back and forth; you should feel a slight amount of drag.

4.

If you feel too much or too little drag, loosen the locknut with the locknut wrench and the adjuster, and turn the adjusting screw until the drag on the feeler gauge is correct.

5.

Tighten the locknut to the specified torque, and recheck the clearance. Repeat the adjustment if necessary.

6.

Rotate the crankshaft 180 ° clockwise (camshaft pulley turns 90 °).

7.

Check and, if necessary, adjust the valve clearance on the No. 3 cylinder.

8.

Rotate the crankshaft 180 ° clockwise (camshaft pulley turns 90 °).

9.

Check and, if necessary, adjust the valve clearance on the No. 4 cylinder.

10.

Rotate the crankshaft 180 ° clockwise (camshaft pulley turns 90 °).

11.

Check and, if necessary, adjust the valve clearance on the No. 2 cylinder.

1.

Check the spark plug seals for damage. If any seals are damaged, replace them.

2.

Thoroughly clean the head cover gasket and the groove.

NOTE: Check and, if necessary, replace the head cover gasket.

3.

Install the head cover gasket (A) in the groove of the cylinder head cover (B). Make sure the head cover gasket is seated securely.

4.

Remove all of the old liquid gasket from the chain case and the No.5 rocker shaft holder.

5.

Clean the head cover contacting surfaces with a shop towel.

6.

Apply liquid gasket, (P/N 08718-0004 or 08718-0009) on the chain case and the No. 5 rocker shaft holder mating areas (A). Install the component within 5 minutes of applying the liquid gasket.

NOTE: If too much time has passed after applying the liquid gasket, remove the old liquid gasket and residue, then reapply new liquid gasket.

7.

Set the spark plug seals (A) on the spark plug tubes. Place the cylinder head cover (B) on the cylinder head, then slide the cover slightly back and forth to seat the head cover gasket.

8.

Inspect the spark plug seals for damage.

9.

Inspect the cover washers (C). Replace any washer that is damaged or deteriorated.

10.

Tighten the bolts in two steps. In the final step torque bolts, in sequence, to 12 N·m (1.2 kgf·m, 9 lbf·ft).

NOTE:

1.

Install the ignition coils.

1.

Install the ignition coil cover.

1.

Install the engine cover.

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 drive belt.

1.

Install the right front wheel.

NOTE: Before installing the wheel, clean the mating surfaces between the brake disc and the inside of the wheel.

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.

Select CRANK PATTERN in the ADJUSTMENT MENU with the HDS.

2.

Select CRANK PATTERN CLEAR, and clear the CKP pattern.

3.

Select CRANK PATTERN LEARNING with the HDS, and follow the screen prompts.

1.

After doing all procedures, select the individual maintenance item you wish to reset with the HDS..