LEMON Manuals: Even more car manuals for everyone
Home >> Nissan-Datsun >> 2004 >> Altima S, Standard >> Repair and Diagnosis >> External Pages >> Different car >> Section 1046 (Engine Mechanical (VK56DE)) >> System Description >> Noise, Vibration, And Harshness (NVH) Troubleshooting >> Use the Chart Below to Help You Find the Cause of the Symptom

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

WARNING: This page is about a different car, the 2012 Nissan Pathfinder. However, it is still accessible from the selected car via links, so may be relevant.
  1. Locate the area where noise occurs.
  2. Confirm the type of noise.
  3. Specify the operating condition of 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 Refer to
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 CYLINDER HEAD DISTORTION 
Rattle C A - A B C Camshaft bearing noise Camshaft journal clearance Camshaft runout INSPECTION OF CAMSHAFT SPROCKET (INT) OIL GROOVE 
INSPECTION OF CAMSHAFT SPROCKET (INT) OIL GROOVE 
Crankshaft pulley Cylinder block (Side of engine) Oil pan Slap or knock - A - B B - Piston pin noise Piston and piston pin clearance Connecting rod bushing clearance CRANKSHAFT END PLAY 
CONNECTING ROD SIDE CLEARANCE 
Slap or rap A - - B B A Piston slap noise Piston-to-bore clearance Piston ring side clearance Piston ring end gap Connecting rod bend and torsion PISTON AND PISTON PIN CLEARANCE 
PISTON RING SIDE CLEARANCE 
PISTON RING END GAP 
CONNECTING ROD BEND AND TORSION 
Knock A B C B B B Connecting rod bearing noise Connecting rod bushing oil clearance (Small end) Connecting rod bearing clearance (Big end) CONNECTING ROD BUSHING OIL CLEARANCE (SMALL END) 
CONNECTING ROD DIAMETER (BIG END) 
Knock A B - A B C Main bearing noise Main bearing oil clearance Crankshaft runout MAIN BEARING OIL CLEARANCE 
CRANKSHAFT RUNOUT 
Front of engine Chain case cover Front cover Tapping or ticking A A - B B B Timing chain and chain tensioner noise Timing chain cracks and wear Timing chain tensioner operation TIMING CHAIN 
TIMING CHAIN 
Front of engine Squeaking or fizzing A B - B - C Drive belts (Sticking or slipping) Drive belts deflection DRIVE BELTS 
Creaking A B A B A B Drive belts (Slipping) Idler pulley bearing operation
Squall Creaking A B - B A B Water pump noise Water pump operation WATER PUMP
Rattle - - A - - - VTC VTC lock pin clearance INSPECTION AFTER INSTALLATION 
A: Closely related B: Related C: Sometimes related -: Not related