Nissan Armada 2025-2026 Service and Repair Manual: Noise, Vibration and Harshness (nvh) Troubleshooting

NVH Troubleshooting Chart

NVH Troubleshooting chart

Use the Chart Below to Help You Find the Cause of the Symptom

1. Locate the area where noise occurs.

2. Confirm the type of noise.

3. Specify the operating condition of the engine.

4. Check specified noise source.

   If necessary, repair or replace these parts.

   Location of noise	Type of noise	Operating condition of engine						Source of noise	Check item	Reference page
   		Before warm-up	After warm-up	When starting	When idling	When racing	While driving
   Top of engine Rocker cover Cylinder head	Ticking or clicking	C	A	—	A	B	—	Tappet noise	Valve clearance	Refer to Adjustment.
   	Rattle	C	A	—	A	B	C	Camshaft bearing noise	Camshaft runout Camshaft journal oil clearance	Refer to Inspection.
   Crankshaft pulley Cylinder block (Side of engine) Oil pan	Slap or knock	—	A	—	B	B	—	Piston pin noise	Piston to piston pin oil clearance Connecting rod bushing oil clearance	Refer to Inspection.
   	Slap or rap	A	—	—	B	B	A	Piston slap noise	Piston to cylinder bore clearance Piston ring side clearance Piston ring end gap Connecting rod bend and torsion	Refer to Inspection.
   	Knock	A	B	C	B	B	B	Connecting rod bearing noise	Connecting rod bushing oil clearance Connecting rod bearing oil clearance	Refer to Inspection.
   	Knock	A	B	—	A	B	C	Main bearing noise	Main bearing oil clearance Crankshaft runout	Refer to Inspection.
   Front of engine Timing chain case	Tapping or ticking	A	A	—	B	B	B	Timing chain and timing chain tensioner noise	Timing chain cracks and wear Timing chain tensioner operation	Refer to Inspection. Refer to Removal and Installation.
   Front of engine	Squeaking or fizzing	A	B	—	B	—	C	Drive belt (Sticking or slipping)	Drive belt deflection	Refer to Inspection.
   	Creaking	A	B	A	B	A	B	Drive belt (Slipping)	Idler pulley bearing operation
   	Squall Creak	A	B	—	B	A	B	Water pump noise	Water pump operation	Refer to WATER PUMP : Inspection.

   A: Closely related B: Related C: Sometimes related —: Not related