Single cam SOHC engine of car Honda Civic 5 and 6

VTEC System Check
1. Remove the VTEC solenoid valve assembly from the cylinder head, and check the solenoid valve filter for clogging - If the filter is clogged, replace the engine oil and engine oil filter. 2. If the filter is not...

Adjusting valve clearance
Note: The valves must be adjusted when the cylinder head temperature is less than 38°C. After adjustment, tighten the crankshaft pulley bolt M cr. =18 Nm (18.5 kgf·m). 1. Remove the cylinder head cover. 2. Remove the...

Crankshaft pulley and pulley bolt
Replacement When removing and installing the pulley, follow the procedure described below. Clean and remove any traces of oil and lubricate the points indicated below. A: Clear x: Remove oil : Lubricate D15Z6, D15Z7,...

Toothed timing belt — checking and adjustment
Attention: Mark the direction of rotation on the belt before removing it. Do not use the top cover and bottom cover to store removed parts. Clean the top cover and bottom cover before installation. Replace the camshaft...

Removing the timing belt
Attention: Turn the crankshaft pulley so that the piston of the first cylinder is at TDC before removing the belt. Check the water pump before installing the timing belt. 1. Remove the mudguard. 2. Loosen the mounting...

Installing the timing belt
The timing belt is installed in the reverse order of removal. Below are just the basic installation steps. 1. Install the crankshaft timing belt so that the piston of cylinder No. 1 is at top dead center. Align the...

Replacing the crankshaft speed change sensor
1. Remove the cylinder head cover. 2. Remove the crankshaft pulley. 3. Remove the top cover and dipstick/tube to measure the oil level. 4. Remove the bottom cover and tensioner pulley bracket. 5. Disconnect the...

Cylinder head — device
Warning: To avoid damage, wait until the coolant temperature drops below 38°C before removing the cylinder head. When removing the gasket, be careful not to damage the mating surface. Caution: Use new O-rings and...

Cylinder head — removal
Engine removal is not required for this procedure. Warning: To avoid damage to the cylinder head, wait until the coolant temperature drops below 38°C before loosening the bolts. Attention: Mark all electrical wiring and...

Rocker arms — removal
1. Loosen the adjustment screws. 2. Unscrew the camshaft holder bolts, then remove the rocker arm axle assembly. Attention: Unscrew in several passes in the sequence shown in the figure.

Rocker arms and idle assemblies
Examination (engines D15Z6, D15Z7, D16Y5, D16Y6, D16Y8) Caution: When reassembling the primary rocker arm. Carefully apply air pressure to the rocker lubrication channel. Check the rocker piston. Press with your hand....

Rocker arms and rocker arm axle
Checking the gap Measure both axes of the intake and exhaust valve rocker arms. 1. Measure the diameter of the rocker arm axis at the location of the rocker arm of the valve of the first cylinder. 2. Set the device to...

Camshaft — check
Attention: Do not rotate the camshaft during the test. Remove the rocker arms and rocker arm axles. 1. Place the camshaft and camshaft retainers on the cylinder head, then tighten the bolts to the specified torque....

Valves, valve springs and oil seals — removal
Attention. Identify the valves and valve springs so that each part can be reinstalled in its original position. 1. Using a socket and plastic hammer, lightly tap the valve spring retainer to help separate the crackers....

Valve guide bushings
Valve movement Measure the gap "valve guide-stem" with a dial indicator when swinging the rod in the direction of normal axial pressure (oscillation method). Clearance between intake valve stem and guide: Standard...

Valve seats — repair
1. Rebuild the valve seats in the cylinder head using a valve seat cutter. Attention. If the guides are worn, replace them before replacing the valve seats. 2. Carefully cut the seat at 45°, removing enough material to...

Valve Seats — Installation
1. Insert the valves into the valve guides, coat the valve stems with engine oil before inserting. Attention: Check that the valves move evenly up and down. 2. Install the support washers on the cylinder head. 3....

Camshaft pulley, camshaft, rocker arms and oil seal — installation
Warning: Make sure all rocker arms are aligned with the valves when tightening the bolts. The valve locknuts must be loosened and the adjustment screws removed before installation. To prevent the rocker arms in the...

Cylinder head — installation
Install the cylinder head in the reverse order of removal: Attention: Always use a new cylinder head gasket. The cylinder head and cylinder block surface MUST be CLEAN. Label "UP" on the camshaft pulley should be at the...