Honda Civic/Acura Integra
since 1994 release
Repair and operation of the car
+ Cars of the Honda Civic and Acura Integra brand
+ Maintenance instruction
+ Routine maintenance
- Repair of the engine without extraction from the car - the Civic model
Preparatory actions and the list of repair procedures which can be executed without extraction of the engine from the car
Reduction of the piston of the first cylinder in the provision of the top dead point (TDP)
Removal and installation of a cover of a head of cylinders
Removal and installation of the inlet pipeline
Removal and installation of a final collector
The VTEC systems - the general information and check of a condition of components
Removal, check of a state and installation of assembly of yokes
Replacement of valvate springs with plates and maslootrazhatelny caps
Removal, check of a state and installation of a gas-distributing belt and cogwheels of the GRM drive
Replacement of a forward epiploon of a bent shaft
Removal, check of a state and installation of the camshaft
Removal and installation of a head of cylinders
Removal and installation of the pallet of a case of the engine
Removal, check of a state and installation of the oil pump
Removal and installation of a flywheel / driving disk
Replacement of a back epiploon of a bent shaft
Check of a state and replacement of support of a suspension bracket of the power unit
+ Repair of the engine without extraction from the car - the Integra model
+ General and capital repairs of the engine
+ Cooling system and heating
+ Power supply system and release
+ Engine electric equipment
+ Control systems of the engine
+ Gear shifting box
+ Coupling and power shafts
+ Brake system
+ Suspension bracket and steering
+ Onboard electric equipment
The VTEC systems – the general information and check of a condition of components
Some of models of the Honda cars are equipped with electronic system of correction of phases of gas distribution (VTEC). On the Civic models the VTEC system of one of two various types (VTEC and VTEC-E) can be used.
Distinction between the ordinary engines and engines equipped with the VTEC system consists in a complete set and the principle of operation of the valvate mechanism. A design of the block of the engine and all hinged knots and units, and also schemes of the organization of lubrication systems and cooling on both units are identical. The engine which is externally equipped with the VTEC system differs in existence from above on a cover of a head of cylinders of a convex inscription of the corresponding content (VTEC).
The onboard processor of the models equipped with the VTEC system is capable to correct phases of operation and the size of opening of inlet valves due to use of various size of cams of the camshaft. The processor, depending on the data arriving from the information sensor, either includes, or switches off system.
As initial parameters for the VTEC systems of both types the following is used:
a) Frequency of rotation of the engine (rpm);
Configuration and the principle of functioning of the VTEC-E systems differ from those for the VTEC systems a little (see below).
The camshaft is equipped with both primary, and secondary cams of the drive of inlet valves. Cams differ both in a form, and on height of rises, i.e. the parameters determining duration and extent of opening of valves.
At small turns of the engine secondary valves work from own cams of the camshaft having very small rise and a peaked form (i.e. valves are slightly opened only slightly and very much for a while), holding the sprayed fuel from consolidation in a head of cylinders. At the same time the good torque with high speed of response to gas develops.
If there is a need for increase in return of the engine, secondary yokes are blocked with primary by means of the special hydraulic device with electronic control.
Cams of the drive of primary and secondary inlet valves of the camshaft in this system are identical in a form and height of rises. Between them the additional third cam called by also intermediate is located. These intermediate cams differ in the bigger height and smaller sharpness of rise that provides the big size and duration of opening of the valve.
At small turns of the engine both primary, and secondary inlet valves work from own cams and open on identical height and with an identical duration (unlike the VTEC-E system). When there is a need for increase in return of the engine, yokes of both inlet valves by means of the special hydraulic device with electronic control are blocked with an intermediate yoke. At the same time duration and height of opening of both valves is defined by a form of the intermediate cam differing in the bigger height and smaller pointedness of rise.
The system allows to try to obtain optimum torque both at small, and at high turns of the engine, depending on the current loading enclosed to it.
Check of a condition of components
Proofreaders of valvate gaps (only VTEC)
Four proofreaders of valvate gaps are placed in holders, forming similarity of hydraulic pushers.
Plate of distribution of phases, plug and returnable spring (only VTEC-E)
Four plates of distribution of phases with returnable springs (see an illustration below) are put in holders of the camshaft on an axis of inlet yokes.
The synchronizing assemblies
Electromagnetic valve of blocking of VTEC
Malfunctions in a contour of the electromagnetic valve of blocking of VTEC lead to operation of a control lamp "Check the engine" for car dashboards. At the same time in memory control units the code of malfunction (DTC) P1259 is brought. On a design the valve of blocking of VTEC with the built-in sensor switch of pressure is similar used in the VTEC system of the Integra models. The description of the procedure of check of serviceability of functioning of assembly is provided in the Part Repair of the engine without extraction from the car - the Integra model of the present Chapter.
Yoke of primary valve
Yoke of the secondary valve
Intermediate yoke (only VTEC)
Intermediate cam of the camshaft (only VTEC)