Subaru Crosstrek Service Manual: Intake manifold vacuum Inspection
MECHANICAL(H4DO) > Intake Manifold Vacuum
INSPECTION
1. Turn the ignition switch to OFF.
2. Warm up the engine.
3. Install the vacuum gauge.
(1) Remove the brake booster vacuum hose from the intake manifold.
(2) Connect the vacuum gauge to the intake manifold.
4. Keep the engine at idle speed and read the vacuum gauge indication.
NOTE:
Condition of engine inside can be diagnosed by observing the behavior of the vacuum gauge needle as described in table below.
Intake manifold vacuum (at idling, A/C OFF):
Standard
−60.0 kPa (−450 mmHg, −17.72 inHg) or more
Diagnosis of engine condition by inspection of intake manifold vacuum | |
Vacuum gauge needle behavior | Possible engine condition |
1. Needle is steady but lower than standard value. This tendency becomes more evident as engine temperature rises. | Leakage around intake manifold gasket, disconnection or damage of vacuum hose |
2. Needle intermittently drops to position lower than standard value. | Leakage around cylinder |
3. Needle drops suddenly and intermittently from standard value. | Sticky valve |
4. When engine speed is gradually increased, needle begins to vibrate rapidly at certain speed, and then vibration increases as engine speed increases. | Weak or broken valve springs |
5. Needle vibrates above and below standard value in narrow range. | Defective ignition system |
5. After inspection, install the related parts in the reverse order of removal.
Intake and exhaust valve Specification
MECHANICAL(H4DO) > Intake and Exhaust ValveSPECIFICATIONRefer to “Cylinder Head” for removal and installation procedures of the intake and exhaust valves. Cylinder Head > REMOVAL&qu ...
Piston Specification
MECHANICAL(H4DO) > PistonSPECIFICATIONRefer to “Cylinder Block” for removal and installation procedures of pistons. Cylinder Block > REMOVAL"> Cylinder Block > INSTALLAT ...
Other materials:
Entering the vehicle while it is running via remote start
1. Unlock the vehicle doors using the
keyless access function (if equipped) or
remote keyless entry system. If the vehicle's
doors are unlocked manually using
the key, the vehicle's alarm system will
trigger (if the alarm system is armed prior
to activating the remote engine start
system) and ...
Replacement
DIFFERENTIALS > Differential Gear OilREPLACEMENTCAUTION:• Gear oil is extremely hot just after driving. Be wary of receiving burns.• Be careful not to spill the differential gear oil on exhaust pipe. If gear oil is spilled, wipe it off completely.1. Lift up the vehicle.2. Remove the d ...
Operation
VEHICLE DYNAMICS CONTROL (VDC) > VDC Sequence ControlOPERATION1. While the VDC sequence control is performed, the operation of the hydraulic unit can be checked using the brake tester or pressure gauge after the hydraulic unit solenoid valve is operated.2. VDC sequence control can be started by S ...
