Use the Chart Below to Help You Find the Cause of the Sympto
- 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.
|
Location of noise |
Type of noise |
Operating condition of engine |
Source of noise |
Check item |
Reference |
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|
Before warm-up |
After warm-up |
When starting |
When idling |
When racing |
While driving |
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|
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 runout Camshaft journal oil clearance |
||
|
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 |
|
|
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 |
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|
Knock |
A |
B |
C |
B |
B |
B |
Connecting rod bearing noise |
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 |
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|
Front of engine Timing chain case |
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 |
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|
Squall Creak |
A |
B |
-- |
B |
A |
B |
Water pump noise |
Water pump operation |
||
|
Rattle |
-- |
-- |
A |
-- |
-- |
-- |
VTC |
VTC lock pin clearance |
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A: Closely relatedB: RelatedC: Sometimes related--: Not related