Pinpoint Test A: Engine Noise, Upper End - Camshaft Phaser And Sprocket(s) [Variable Camshaft Timing (VCT) Engines Only]

Engine







Pinpoint Tests

Pinpoint Test A: Engine Noise, Upper End - Camshaft Phaser and Sprocket(s) [Variable Camshaft Timing (VCT) Engines Only]

This pinpoint test is intended to diagnose the following:
- Camshaft phaser and sprocket noise



PINPOINT TEST A: ENGINE NOISE, UPPER END - CAMSHAFT PHASER AND SPROCKET(S) [VCT ENGINES ONLY]

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A1 VERIFY THE CAMSHAFT PHASER AND SPROCKET(S) NOISE


- Ignition OFF.
- Disconnecting the RH and LH Variable Camshaft Timing (VCT) solenoid electrical connectors.
- Start the vehicle and elevate the engine rpm and then return to idle.
- Is the camshaft phaser and sprocket noise still audible?

Yes
The concern is not VCT related. GO to Symptom Chart - Engine NVH. Symptom Chart - Engine NVH

No
GO to A2.

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A2 CHECK THE ENGINE MINIMUM OIL PRESSURE


- Check the engine oil pressure. Carry out the oil pressure test. Oil Pressure Test
- Is the oil pressure reading within the minimum specification?

Yes
GO to A3.

No
GO to Pinpoint Test B. Pinpoint Test B: Low Oil Pressure

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A3 CHECK THE VCT HOUSING OIL SCREEN FOR DEBRIS


- Remove the VCT housing oil screen and inspect for debris.
- Is the VCT oil screen clean and free of debris?

Yes
INSPECT the VCT camshaft phaser and sprockets and REPAIR as necessary. REFER to Camshaft Phaser and Sprocket Inspection Camshaft Phaser And Sprocket Inspection.

No
REMOVE the VCT housing. CLEAN and INSPECT the VCT housing.
REFER to Variable Camshaft Timing (VCT) Housing Cleaning and Inspection Variable Camshaft Timing (VCT) Housing Cleaning and Inspection.

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