NOISE, VIBRATION AND HARSHNESS (NVH) TROUBLESHOOTING
NVH Troubleshooting - Engine Noise
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.
| 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 | Inspection (GT-R certified NISSAN dealer) |
| Rattle | C | A | — | A | B | C | Camshaft bearing noise | Camshaft runout Camshaft journal oil clearance | Camshaft (GT-R certified NISSAN dealer) Camshaft (GT-R certified NISSAN dealer) | |
| 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 | Cylinder Block (GT-R certified NISSAN dealer) Cylinder Block (GT-R certified NISSAN dealer) |
| 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 | Cylinder Block (GT-R certified NISSAN dealer) Cylinder Block (GT-R certified NISSAN dealer) Cylinder Block (GT-R certified NISSAN dealer) Cylinder Block (GT-R certified NISSAN dealer) | |
| Knock | A | B | C | B | B | B | Connecting rod bearing noise | Connecting rod bushing oil clearance Connecting rod bearing oil clearance | Cylinder Block (GT-R certified NISSAN dealer) Cylinder Block (GT-R certified NISSAN dealer) | |
| Knock | A | B | — | A | B | C | Main bearing noise | Main bearing oil clearance Crankshaft runout | Main Bearing (GT-R certified NISSAN dealer) Cylinder Block (GT-R certified NISSAN dealer) | |
| 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 | Inspection (GT-R certified NISSAN dealer) Disassembly and Assembly (GT-R certified NISSAN dealer) |
| Front of engine | Squeaking or fizzing | A | B | — | B | — | C | Drive belt (Sticking or slipping) | Drive belt deflection | Checking |
| 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 | Inspection (GT-R certified NISSAN dealer) | |