Use the Chart Below to Help You Find the Cause of the Symptom
- Locate the area where noise occurs.
- Confirm the type of noise.
- Specify the operating condition of engine.
- Check specified noise source.
If necessary, repair or replace these parts.
SYMPTOM CHART
| Location of noise | Type of noise | Operating condition of engine | Source of noise | Check item | Reference Information | |||||
|---|---|---|---|---|---|---|---|---|---|---|
| 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 | VALVE CLEARANCE |
| Rattle | C | A | - | A | B | C | Camshaft bearing noise | Camshaft journal oil clearance Camshaft runout |
CAMSHAFT JOURNAL OIL CLEARANCE INSPECTION AFTER REMOVAL |
|
| 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 |
PISTON TO PISTON PIN OIL CLEARANCE CONNECTING ROD BUSHING OIL CLEARANCE |
| 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 |
CONNECTING ROD SIDE 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 Connecting rod bearing oil clearance |
CONNECTING ROD BUSHING OIL CLEARANCE CONNECTING ROD BEARING OIL CLEARANCE |
|
| Knock | A | B | - | A | B | C | Main bearing noise | Main bearing oil clearance Crankshaft runout |
MAIN BEARING OIL CLEARANCE CRANKSHAFT RUNOUT |
|
| Front of engine 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 |
| Front of engine | Squeaking or fizzing | A | B | - | B | - | C | Drive belt (Sticking or slipping) | Drive belt deflection | DRIVE BELTS |
| 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 | WATER PUMP | |
| A: Closely related B: Related C: Sometimes related -: Not related | ||||||||||