LEMON Manuals: Even more car manuals for everyone
Home >> Nissan-Datsun >> 2007 >> Sentra SE-R >> Repair and Diagnosis (Single Page) >> Engine Mechanical >> Engine Mechanical (Qr25DE) >> 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

  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.

TROUBLESHOOTING REFERENCE CHART

Location of noise Type of noise Operating condition of engine Source of noise Check item
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 
Rattle C A - A B C Camshaft bearing noise CAMSHAFT JOURNAL CLEARANCE 
CAMSHAFT RUNOUT 
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 
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 
Knock A B C B B B Connecting rod bearing noise CONNECTING ROD BUSHING CLEARANCE (SMALL END) 
CONNECTING ROD BEARING CLEARANCE (BIG END) 
Knock A B - A B C Main bearing noise MAIN BEARING OIL CLEARANCE 
CRANKSHAFT RUNOUT 
Front of engine Timing chain cover Tapping or ticking A A - B B B Timing chain and chain tensioner noise TIMING CHAIN CRACKS AND WEAR 
Timing chain tensioner operation
Front of engine Squeaking or fizzing A B - B - B Drive belts (Sticking or slipping) DRIVE BELTS DEFLECTION 
Creaking A B A B A B Drive belts (Slipping) Idler pulley bearing operation
Squall Creak A B - B A B Water pump noise Water pump operation
A: Closely related B: Related C: Sometimes related -: Not related