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. Repair or replace the identified part as necessary.
|
Location of noise |
Type of noise |
Operating condition of engine |
Source of noise |
Check item |
Reference |
|||||
|
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 |
-- |
C |
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