Honda Civic Service Manual: VTC Actuator Inspection (K24Z7)

Honda Civic Service Manual / Powertrain / Engine / Valvetrain / VTC Actuator Inspection (K24Z7)

1.	Air Cleaner Assembly

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

Remove the harness clamp (C).

Remove the air cleaner (D).

2.	Vehicle Lift

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

3.	Tire and Wheel-Removal, Front Right

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Remove the right front wheel.

4.	Splash Shield

Remove the splash shield (A).

5.	Radiator Cap

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

6.	Radiator Coolant - Replacement

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

7.	Drive Belt

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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.

8.	Wiper Arm Assembly

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

Remove the cowl top wiper covers (A).

Remove the wiper arms (B).

9.	Both Side Cowl Covers

Remove the side cowl cover (A).

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

10.	Center Cowl Cover

Remove the center cowl cover (A).

Disconnect the windshield washer tube (B).

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

11.	Under Cowl Panel

Remove the under cowl panel (A).

12.	Engine Cover

Remove the engine cover.

13.	Ignition Coil Cover

Remove the ignition coil cover.

14.	Ignition Coil

Remove the ignition coils.

15.	Cylinder Head Cover

Remove the cylinder head cover.

16.	Set The Crankshaft To Top Dead Center

	1.	Turn the crankshaft so its white mark (A) lines up with the pointer (B).
		NOTE: The other pointer (C) is not used.

17.	Set The No.1 Piston at Top Dead Center (With Cam Chain Case/Oil Pump)

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.

18.	Cam Chain Case Peripheral Assembly

Remove the harness clamp.

19.	VTC Oil Control Solenoid Valve

Remove the ground cable (A).

Remove the VTC oil control solenoid valve (B).

20.	Crankshaft Pulley

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

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

21.	Engine Jack Support (State Of A Low Vehicle)

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

22.	Upper Torque Rod

Remove the upper torque rod.

23.	Side Engine Mount

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

24.	Side Engine Mount Bracket, Engine Side

Remove the side engine mount bracket.

25.	Cam Chain Case

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

26.	Cam Chain Auto-Tensioner

Loosely install the crankshaft pulley.

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.

Remove the auto-tensioner.

27.	Cam Chain Tensioner Arm and Cam Chain Guide

Remove cam chain guide B.

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

28.

Cam Chain

Remove the cam chain.

29.	Camshaft Holder

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

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

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

1.	VTC Actuator - Inspection

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.

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

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

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

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

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

1.	Camshaft Holder

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

Tighten the bolts to the specified torque.

Specified Torque

8 x 1.25 mm 22 N·m (2.2 kgf·m, 16 lbf·ft)

6 x 1.0 mm 12 N·m (1.2 kgf·m, 9 lbf·ft)

6 x 1.0 mm Bolts: ,

2.	Set The Crankshaft To Top Dead Center

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.

3.	Set The Cam Shaft To Top Dead Center (Without Cam Chain Case/Oil Pump)

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.

Cam Chain

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).

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).

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

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).

5.	Cam Chain Tensioner Arm and Cam Chain Guide

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

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Install cam chain guide B.

6.	Cam Chain Auto-Tensioner

	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.

Install the auto-tensioner.

Remove the pin from the auto-tensioner.

Remove the camshaft lock pin set.

7.	Cam Chain Case

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

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

Clean and dry the chain case mating surfaces.

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.

Apply a 2.5 mm (0.098 in) diameter bead of liquid gasket along the broken line (A) and (B).

Apply a 3.0 mm (0.118 in) diameter bead of liquid gasket along the broken line (C).

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

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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:

Apply a 2.5 mm (0.098 in) diameter bead of liquid gasket along the broken line (A).

Apply a 3.0 mm (0.118 in) diameter bead of liquid gasket along the broken line (B).

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

Install the spacer (A), then install a new O-ring (B) on the chain case. Set the edge of the chain case (C) to the edge of the oil pan (D), then install the chain case on the engine block (E). Wipe off the excess liquid gasket on the oil pan and the chain case mating area.

NOTE:

When installing the chain case, do not slide the bottom surface onto the oil pan mounting surface.

Wait at least 30 minutes before filling the engine with oil.

Do not run the engine for at least 3 hours after installing the chain case.

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8.	Side Engine Mount Bracket, Engine Side

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

9.	Side Engine Mount

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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).

Install the ground cable (D).

10.	Transmission Mount - Loosen

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

11.	Lower Torque Rod Mounting Bolt - Loosen

Loosen the lower torque rod mounting bolt (A).

12.	Side Engine Mount - Tighten

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Tighten the side engine mount bracket mounting bolt and nut.

13.	Transmission Mount - Tighten

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Tighten the transmission mount bracket mounting bolt and nuts.

14.	Lower Torque Rod Mounting Bolt - Tighten

Loosen the lower torque mount mounting bolt.

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

15.	Air Cleaner Assembly

Install the air cleaner (A).

Install the harness clamp (B).

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

16.	Upper Torque Rod

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Install the upper torque rod using new bolts.

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

17.	Crankshaft Pulley

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

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

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).

Tighten the pulley bolt an additional 90 °.

18.	Splash Shield

Install the splash shield (A).

19.	VTC Oil Control Solenoid Valve

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

NOTE:

Coat a new O-ring with engine oil.

Clean and dry the mating surface of the valve.

Install the ground cable (C).

20.	Cam Chain Case Peripheral Assembly

Install the harness clamp.

21.	Valve Clearance - Adjustment

Select the correct feeler gauge for the valve clearance you are going to check.

Valve Clearance
Intake:	0.21－0.25 mm (0.009－0.009 in)
Exhaust:	0.25－0.29 mm (0.010－0.011 in)

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.

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.

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

Specified Torque

7 x 0.75 mm

14 N·m (1.4 kgf·m, 10 lbf·ft)

Apply new engine oil to the nut threads.

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

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

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

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.

22.	Cylinder Head Cover

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.

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

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

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.

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.

Inspect the spark plug seals for damage.

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:

Wait at least 30 minutes before filling the engine with oil.

Do not run the engine for at least 3 hours after installing the head cover.

23.	Ignition Coil

Install the ignition coils.

24.	Ignition Coil Cover

Install the ignition coil cover.

25.	Engine Cover

Install the engine cover.

26.	Under Cowl Panel

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Install the under cowl panel (A).

27.	Center Cowl Cover

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

Connect the windshield washer tube (B).

Install the center cowl cover (C).

28.	Both Side Cowl Covers

Install the side cowl cover (A).

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

29.	Wiper Arm Assembly

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

Install the wiper arms (A).

Install the cowl top wiper covers (B).

30.	Drive Belt

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Install the drive belt.

31.	Radiator Coolant - Replacement

Follow the chart and pour coolant into the radiator up to the base of the filler neck.

NOTE:

Use Honda Long Life Antifreeze/Coolant Type 2, and if necessary add Honda Extreme Cold Weather Antifreeze/Coolant Type 2 (concentrate). Using a non-Honda coolant can result in corrosion, causing the cooling system to malfunction or fail.

Honda Long Life Antifreeze/Coolant Type 2 is a mixture of 50 % antifreeze and 50 % water. Honda Extreme Cold Weather Antifreeze/Coolant Type 2 is a 100 % concentration coolant. Do not add water to either coolant.

If the vehicle is regularly driven in very low temperatures (below -22 °F ( -30 °C)), a 60 % concentration of coolant should be used.

Operation	Vehicle Usage (Desired Mixture)	Current Mixture	Coolant Drain	Add Amount of Honda Extreme Cold Weather Antifreeze/Coolant Type 2 (100 % concentrate)	Then add Honda Long Life Antifreeze/Coolant Type 2 (50/50)
Coolant Change	Normal Area (50/50)	50/50 60/40 unknown	Drain radiator, engine block, and reservoir	None	Top off the cooling system
	Very Cold Area (60/40)	50/50 unknown	Drain radiator, engine block, and reservoir	About 1.3 L (44 fl oz)
	Very Cold Area (60/40)	60/40	Drain radiator, engine block, and reservoir	About 1.2 L (41 fl oz)
Engine Overhaul	Normal Area (50/50)	-	-	None
Engine Overhaul	Very Cold Area (60/40)	-	-	About 1.2 L (41 fl oz)
Coolant Winterizing	Very Cold Area (60/40)	50/50	Drain about 2.0 L (68 fl oz) from radiator	About 1.2 L (41 fl oz)
Coolant Winterizing	Very Cold Area (60/40)	unknown*	Drain radiator, engine block, and reservoir	About 1.2 L (41 fl oz)

*: When you want to winterize the coolant with the minimum amount of coolant change but the current coolant concentration in the vehicle is unknown, you must drain all coolant from the cooling system.

Engine Coolant Capacities (Including the coolant reservoir capacity of 0.475 L (0.1255 US gal))

Except K24Z7 engine
	Manufacturer	Capacity
At Coolant Change	DENSO	5.59 L (1.477 US gal)
At Coolant Change	TRAD	5.50 L (1.453 US gal)
After Engine Overhaul (M/T)	DENSO	6.42 L (1.696 US gal)
After Engine Overhaul (M/T)	TRAD	6.33 L (1.672 US gal)
After Engine Overhaul (A/T)	DENSO	6.56 L (1.732 US gal)
After Engine Overhaul (A/T)	TRAD	6.47 L (1.709 US gal)
After Engine Overhaul (CVT)	DENSO	6.52 L (1.722 US gal)
After Engine Overhaul (CVT)	TRAD	6.43 L (1.699 US gal)

Engine Coolant Capacities (Including the coolant reservoir capacity of 0.475 L (0.1255 US gal))

K24Z7 engine
	Capacity
At Coolant Change	5.5 L (1.45 US gal)
After Engine Overhaul	6.7 L (1.78 US gal)

32.	Tire and Wheel-Installation, Front Right

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	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.

33.	HDS DLC - Connection

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

Turn the ignition switch to ON (II).

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

34.	CKP Pattern Clear/CKP Pattern Learn

Select CRANK PATTERN in the ADJUSTMENT MENU with the HDS.

Select CRANK PATTERN CLEAR, and clear the CKP pattern.

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

35.	Maintenance Minder Reset

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

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Honda Civic Service Manual: VTC Actuator Inspection (K24Z7)

Exhaust Camshaft Sprocket Removal and Installation (K24Z7)

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See also: