Warning! It should not be forgotten that gasoline is a highly flammable liquid - when working with components of the power system, follow all fire safety precautions. Do not smoke or approach the work area with an open flame or an uncovered carrier. Do not service the system in a room equipped with natural gas-fired, pilot flame-equipped heaters (such as water heaters and clothes dryers). Do not forget that gasoline is one of the carcinogenic substances that contribute to the development of cancer - try to avoid getting fuel on open areas of the body - use protective rubber gloves, in case of accidental unforeseen contact, wash your hands thoroughly with warm water and soap. Clean up spilled fuel immediately and do not store fuel-soaked rags near open flames. Remember that the fuel injection system of models equipped with fuel injection is constantly under pressure. Relieve any residual pressure in the system before disconnecting fuel lines (see chapter Power and exhaust systems). Wear safety goggles when servicing power system components. Keep a class B fire extinguisher handy at all times!
Withdrawal
1. Disconnect the negative cable from the battery.
Attention! If the stereo system installed in the car is equipped with a security code, before disconnecting the battery, make sure that you have the correct combination to activate the audio system!
2. Empty the cooling system (see chapter Current service).
3. Remove the air cleaner with air intake (see chapter Power and exhaust systems).
Note. On B18C1 engines, the intake air bypass solenoid valve connector is located under the pipeline, as a result of which access to it is extremely limited. Alternatively, it is possible to disconnect the electrical wiring after removing the partial separation of the pipeline from the head.
4. Having clearly marked, disconnect all electrical wiring and vacuum lines that interfere with the dismantling of the intake pipeline (see accompanying illustration).
5. Disconnect the accelerator cable from the throttle control lever (see chapter Power and exhaust systems).
6. Remove the cooling path hoses from the throttle body. On engines B18B1 and B18C1, also disconnect the cooling hoses from the idle speed stabilization valve (IAC).
7. Relieve pressure in the power supply system and disconnect the fuel supply and return lines from the fuel line (see chapter Power and exhaust systems).
8. Working from below under the engine compartment, remove the mounting bracket supporting the intake piping (see accompanying illustration).
9. Disconnect the bypass hose of the cooling system from the inlet pipeline (from the timing belt) (see accompanying illustration).
10. Give fixing nuts (see previous illustration) and remove the intake manifold from the engine.
11. If the pipeline is equipped with a removable air chamber (V18S1 engines), if desired, you can give the fixing nuts and separate the chamber from the pipeline (see accompanying illustration). Remove gasket, intake air bypass chamber (IAB), then the second pad.
Installation
1. Clean the intake manifold nuts with solvent, then dry them thoroughly, using compressed air if possible.
2. Evaluate the flatness of the mating surface of the pipeline using a special gauge (placed on the edge of a steel ruler) and a blade type probe.
3. Inspect the pipeline for cracks and signs of deformation. A defective pipeline must be grooved or replaced.
4. Check the condition of the fasteners (bolts/studs) pipeline. Replace defective elements.
5.. Scrape off any traces of old gasket material from the mating surfaces of the head and intake manifold, then wipe the surfaces with a rag soaked in acetone.
6. Having picked up a new sealing gasket, install the pipeline in its regular place and secure it by hand-tightening all nuts. Acting in order (see accompanying illustration), tighten fasteners to the required torque (see Specifications).
7. Further installation is carried out in the reverse order of dismantling. In conclusion, do not forget to fill the cooling system (see chapter Current service).