Subaru Crosstrek manuals

Subaru Crosstrek Service Manual: Engine noise Inspection

MECHANICAL(H4DO) > Engine Noise

INSPECTION

Type of sound

Condition

Possible cause

Regular clicking sound

Sound increases as engine speed increases.

Valve mechanism is defective

Incorrect cam clearance

Worn camshaft

Broken valve spring

Defective valve shim

Heavy and dull clank

Oil pressure is low.

Worn crankshaft bearing

Worn connecting rod bearing

Oil pressure is normal.

Loosened flywheel mounting bolt

Damaged engine mounting

High-pitched clank

Sound is noticeable when accelerating with an overload condition.

Ignition timing advanced

Accumulation of carbon inside combustion chamber

Wrong heat range of spark plug

Improper octane value gasoline

Clank noise when engine speed is between 1,000 and 2,000 r/min

Sound is reduced when the fuel injector connector of the noisy cylinder is disconnected.*

Worn crankshaft bearing

Worn connecting rod bearing

Knocking sound when engine is operating under idling speed and engine is warm

Sound is reduced when the fuel injector connector of the noisy cylinder is disconnected.*

Worn cylinder liner and piston ring

Broken or stuck piston ring

Worn piston pin and piton pin hole of piston

Sound is not reduced if each fuel injector connector is disconnected in turn.*

Unusually worn valve rocker

Unusually worn valve shim

Worn cam sprocket

Worn journal of cam carrier and camshaft cap

Squeaky sound

Insufficient generator lubrication

Rubbing sound

Poor contact of generator brush and rotor

Gear scream when starting engine

Defective ignition starter switch

Worn gear and starter pinion

Sound like polishing glass with a dry cloth

Defective V-belt tensioner assembly (loose V-belt)

Defective water pump shaft

Hissing sound

Insufficient compression

Air leakage in air intake system, hose, connection or manifold

Timing chain noise

Loose timing chain

Timing chain contacting with adjacent part

Valve noise

Incorrect cam clearance

* When disconnecting the fuel injector connector, the malfunction indicator light illuminates and DTC is stored in ECM memory.

Therefore, perform the Clear Memory Mode Clear Memory Mode > OPERATION"> and Inspection Mode Inspection Mode > PROCEDURE"> after connecting the fuel injector connector.

Crankshaft Specification
MECHANICAL(H4DO) > CrankshaftSPECIFICATIONRefer to “Cylinder Block” for removal and installation procedures of the crankshaft. Cylinder Block > REMOVAL"> Cylinder Block > ...

Engine oil pressure Inspection
MECHANICAL(H4DO) > Engine Oil PressureINSPECTION1. Disconnect the ground cable from battery. NOTE">2. Remove the oil pressure switch. Oil Pressure Switch > REMOVAL">3. Install ...

Other materials:

Replacement
MANUAL TRANSMISSION AND DIFFERENTIAL(5MT) > Transmission Gear OilREPLACEMENT1. Pull out the oil level gauge.2. Lift up the vehicle.3. Using the TORX® bit T70, remove the drain plug, and drain the gear oil completely.CAUTION:• Immediately after the vehicle has been running or after idling f ...

Removal
CONTROL SYSTEMS > Select CableREMOVAL1. Shift the select lever to “N” range.2. Disconnect the ground cable from battery. NOTE">NOTE:For model with battery sensor, disconnect the ground terminal from battery sensor.3. Lift up the vehicle.4. Remove the center exhaust pipe. Cen ...

Base display audio set (if equipped)
Power/VOLUME knob Eject button AUDIO/TUNE knob HOME button APPS button Display SEEK/TRACK buttons The audio set will operate only when the ignition switch is in the "ACC" or "ON" position. Power and audio controls: refer to "Basic operation" SUBARU STARLINK (if equipp ...

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