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:
Batch save of event record data Operation
AIRBAG SYSTEM (DIAGNOSTICS) > Batch save of Event record dataOPERATION1. On «Start» display, select «Diagnosis».2. On «Vehicle selection» display, input the target vehicle information and select «Confirmed».3. On «Main Menu» display, select «Each System».4. On «Select System» displa ...
Wiper and washer
WARNING
In freezing weather, do not use the
windshield washer until the windshield
is sufficiently warmed by the
defroster.
Otherwise the washer fluid can
freeze on the windshield, blocking
your view.
CAUTION
Do not operate the washer continuously
for more than 10 seconds,
or when ...
Power door locking switches
Lock
Unlock
All doors and the rear gate can be locked
and unlocked by the power door locking
switches located at the driver's side and
the front passenger's side doors.
To lock the doors, push the front side of
the switch.
To unlock the doors, push the rear side of
the switch. ...
