Engine

engine - knocking noise crankshaft wobble during operation. INSTALL new from lower front of engine pulley/damper as necessary. Refer to the appropriate

section in Group 303 for the procedure. TEST the system for normal operation after the repair.

Engine noise, front of Timing drive REMOVE the accessory drive belt. Refer engine - ticking, tapping or components to the appropriate section in Group 303 rattling noise from the for the procedure. front of the engine USE the EngineEAR to isolate the noise

to the engine front cover. REMOVE the engine front cover and INSPECT the timing drive components. INSTALL new parts as necessary. Refer to the appropriate section in Group 303 for the procedure. TEST the system for normal operation after the repair.

Engine noise, upper end - Fuel rail clip CHECK for loose or damaged fuel rail ticking noise near the fuel Fuel injector clip(s). REPAIR as necessary. rail and intake manifold USE the EngineEAR to isolate the noisy

injector(s). INSTALL a new injector(s) as necessary. Refer to the appropriate section in Group 303 for the procedure. TEST the system for normal operation after the repair.

Fuel injection pump This is a normal engine noise that can be (GTDI only) verified by listening to another vehicle. If

noise is excessive, REPAIR as necessary. TEST the system for normal operation after the repair.

Engine noise, upper end - Valve train noise (bled CARRY OUT the Valve Train Analysis ticking, knocking or rattle down lifter/lash Component Test in this section. INSTALL noise that occurs during adjuster) new parts as necessary. Refer to the idle or high idle during the appropriate section in Group 303 for the first cold start of the day procedure. TEST the system for normal and may disappear as the operation after the repair. engine warms

Engine noise, upper end - Worn or damaged REMOVE the spark plugs. INSPECT and occurs mostly with a spark plugs INSTALL new as necessary. Refer to the warm engine at appropriate section in Group 303 for the light/medium acceleration procedure. TEST the system for normal

operation after the repair.

Engine noise, upper end - Low oil level CHECK the oil level. FILL as necessary. rattling noise from the valve train. Worse when the engine is cold

Thin or diluted oil INSPECT the oil for contamination. If the

oil is contaminated, CHECK for the source. REPAIR as necessary. CHANGE the oil and filter. TEST the system for normal operation after the repair.

Low oil pressure CARRY OUT the Oil Pressure Test in this

section. If not within specifications, REMOVE the engine oil pan. Refer to the appropriate section in Group 303 for the procedure. INSPECT for a blocked oil pick up tube. TEST the system for normal operation after the repair.

Worn valve train CARRY OUT the Valve Train Analysis