Double cam DOHC engine of car Honda Civic 5 and 6

Electronically controlled variable valve timing and stroke solenoid (VTEC)
Troubleshooting diagram The Malfunction Indicator Lamp (MIL) displays Diagnostic Trouble Code (DTC) 21: VTEC Solenoid Circuit Problem. * Testing on the road: Accelerate in 1st gear until the engine speed exceeds 6,000...

Dual Camshaft Engines (DOHC) — inspection
1. Remove the VTEC solenoid valve assembly from the cylinder head and check if the solenoid filter is clogged. If clogged, replace engine oil filter and engine oil. 2. If the filter is not clogged, press the VTEC...

Rocker arms (VTEC)of engines with two camshafts (DOHC)
Manual inspection 1. Set the piston of the first cylinder to TDC. 2. Remove the ignition wire cover and wires. 3. Remove the ignition clips by pressing the lock. 4. Remove the cylinder head cover. 5. Press the middle...

Adjusting valve clearance
Note: The valves should be adjusted when the cylinder head temperature is less than 38°C. After adjustment, tighten the crankshaft pulley bolt to 177 Nm. 1. Remove the cylinder head cover. 2. Set the piston of the first...

Toothed timing belt — device
Attention. Mark the direction of rotation on the belt before removing it. Replace the rubber seals between the cylinder head and cover. Do not use the middle and bottom covers to store removed parts. Clean the middle...

Timing Belt — Check
1. Remove the cylinder head cover. 2. Check the timing belt for cracks and traces of coolant or oil. Attention: Replace the belt if the belt is soaked with oil or coolant. Remove any oil or solvent that may have come...

Timing Belt — Removal
Attention. Rotate the crankshaft pulley so that the piston of cylinder #1 is at TDC before removing the belt. When installing the timing belt, inspect the water pump. 1. Remove the crankcase guard 2. Remove the...

Timing Belt Installation
Install the timing belt in the reverse order of removal. Only the main points are described below. 1. Install the crankshaft toothed pulley so that the piston of cylinder No.1 is at TDC. Align the mark on the crankshaft...

Cylinder head — device

Cylinder head — removal
Caution: To avoid damage to the cylinder head, wait until the coolant temperature drops below 38°C before removing. Caution: Use new O-rings and gaskets when reassembling. 1. Disconnect the negative terminal from the...

Rocker arms — removal
1. Secure the rocker arms with a rubber band to prevent them from separating. Remove the exhaust and exhaust rocker arm oil control hole, then remove the VTEC solenoid valve and seal bolts. Note: The design of the oil...

Rocker arms and free running units
Examination Caution: When reassembling the primary rocker arm, carefully apply compressed air to the rocker arm lube passage. 1. Check the rocker arm piston. Press the piston with your finger, if the piston does not...

Camshafts
Inspection Note: Do not rotate the camshaft during inspection. Remove the rocker arms and rocker shafts. 1. Install the camshaft and camshaft caps onto the cylinder head, and then tighten the bolts to the specified...

Valves, valve springs and valve stem seals
Valve dimensions Inlet valve A Nominal value: 32.90 - 33.10 mm B Nominal value: 101.00 - 101.30 mm C Nominal value: 5.475 - 5.485 mm C Limit value: 5.445 D Nominal value: 1.05 - 1.35 mm D Limit value: 0.85 mm Exhaust...

Cylinder head
See the same section for Single camshaft (SOHC) engines, using the technical data for a dual camshaft (DOHC) engine. Cylinder head height: Nominal value: 141.95 -142.05 mm Valve guide bushings The first way of...

Rocker arms — installation
1. Install the rocker arms in the reverse order of removal: The valve adjusting locknuts must be loosened and the adjusting screw unscrewed before installation. The components must be reinstalled in their original...

Cylinder head — installation
Install the cylinder head in the reverse order of removal: Attention. Always use a new cylinder head and manifold gasket. The cylinder head gasket is a metal gasket. Be careful not to bend it. Rotate the crankshaft to...

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Civic 8 (2005-2011)

Civic 7 (2000-2005)