Fig. 2.327. Intake manifold components
Removal
Fig. 2.328. Disconnecting the crankcase ventilation hose
Disconnect the crankcase ventilation hose from the throttle body (Fig. 2.328).
Fig. 2.329. Accelerator pedal cable
Disconnect the accelerator pedal cable (Fig. 2.329).
Disconnect the coolant hose from the throttle body.
Disconnect the positive crankcase ventilation valve hose and the brake booster vacuum hose.
Fig. 2.330. Removing the vacuum hose nipple
Remove the vacuum hose fitting (Fig. 2.330).
Fig. 2.331. Removing the intake manifold receiver support bracket
Remove the intake manifold receiver support bracket (Fig. 2.331).
Before disconnecting the high pressure fuel hose from the fuel rail, relieve any residual pressure in the system.
Fig. 2.332. Fuel hoses
Disconnect the fuel hoses from the fuel manifold (Fig. 2.332).
Fig. 2.333. Receiver and gasket
Remove the intake manifold receiver and gasket (Fig. 2.333).
Fig. 2.334. Fuel injector wiring harness connector
Disconnect the fuel injector wiring harness connector (Fig. 2.334).
Fig. 2.335. Fuel manifold
Remove the fuel manifold together with the injectors and fuel pressure regulator (Fig. 2.335).
Caution: Be careful not to drop the injectors when removing the fuel rail.
Fig. 2.336. Coolant temperature sensor connector
Disconnect the coolant temperature sensor connector (Fig. 2.336).
Fig. 2.337. Removing the intake manifold
Remove the intake manifold assembly and gasket (Fig. 2.337).
Checking the intake manifold and receiver
Check the parts for cracks and damage.
Check the condition of the air passages, coolant outlet and supply channels and vacuum hose fittings. Clean if necessary
Fig. 2.338. Intake manifold mating surface
Using a scriber and a flat feeler gauge, measure the warpage of the intake manifold mating surface (Fig. 2.338).
Nominal value of flatness: less than 0.15 mm.
Maximum permissible value: 0.20 mm.
Fig. 2.339. Tightening order of intake manifold mounting bolts
Installation
Installation is carried out in the reverse order of removal.
Tightening torque:
- Intake manifold - 19–21 Nm.
- Intake manifold receiver - 15–20 Nm.