TROUBLESHOOTING GUIDE

B-4spec table

Troubleshooting Guide (continued)

Problem	Possible Cause	Remedy	Page
Insufficient power	Insufficient compression: Malfunction of HLA*	Replace	B-20
Insufficient power	Insufficient compression: Compression leakage from valve seat	Repair	B-51
Insufficient power	Insufficient compression: Seized valve stem	Replace	B-49
Insufficient power	Insufficient compression: Weak or broken valve spring	Replace	B-52
Insufficient power	Insufficient compression: Failed cylinder head gasket	Replace	B-16
Insufficient power	Insufficient compression: Cracked or distorted cylinder head	Replace	B-48
Insufficient power	Insufficient compression: Sticking, damaged, or worn piston ring	Replace	B-56
Insufficient power	Insufficient compression: Cracked or worn piston	Replace	B-56
Insufficient power	Malfunction of fuel system	Refer to Section F
Insufficient power	Malfunction of ignition system	Refer to Section G
Insufficient power	Others: Slipping clutch	Refer to Section H
Insufficient power	Others: Dragging brakes	Refer to Section P
Insufficient power	Others: Wrong size tires	Refer to Section Q
Abnormal combustion	Malfunction of engine-related components: Malfunction of HLA*	Replace	B-20
Abnormal combustion	Malfunction of engine-related components: Sticking or burned valve	Replace	B-49
Abnormal combustion	Malfunction of engine-related components: Weak or broken valve spring	Replace	B-52
Abnormal combustion	Malfunction of engine-related components: Carbon accumulation in combustion chamber	Eliminate carbon	—
Abnormal combustion	Malfunction of fuel system	Refer to Section F
Abnormal combustion	Malfunction of ignition system	Refer to Section G
Engine noise	Crankshaft- or bearing-related parts: Excessive main bearing oil clearance	Replace or repair	B-63
Engine noise	Crankshaft- or bearing-related parts: Main bearing seized or heat-damaged	Replace	B-58
Engine noise	Crankshaft- or bearing-related parts: Excessive crankshaft end play	Replace or repair	B-64
Engine noise	Crankshaft- or bearing-related parts: Excessive connecting rod oil clearance	Replace or repair	B-65
Engine noise	Crankshaft- or bearing-related parts: Connecting rod bearing seized or heat-damaged	Replace	B-58
Engine noise	Piston-related parts: Worn cylinder	Replace or repair	B-54
Engine noise	Piston-related parts: Worn piston or piston pin	Replace	B-57
Engine noise	Piston-related parts: Seized piston	Replace	B-56
Engine noise	Piston-related parts: Damaged piston ring	Replace	B-56
Engine noise	Piston-related parts: Bent connecting rod	Replace	B-57
Engine noise	Valves or timing-related parts: Malfunction of HLA*	Replace	B-20
Engine noise	Valves or timing-related parts: Broken valve spring	Replace	B-52
Engine noise	Valves or timing-related parts: Excessive valve guide clearance	Replace	B-49
Engine noise	Malfunction of cooling system	Refer to Section E
Engine noise	Malfunction of fuel system	Refer to Section F
Engine noise	Others: Malfunction of water pump bearing	Refer to Section E
Engine noise	Others: Improper drive belt tension	Adjust	B-6
Engine noise	Others: Malfunction of alternator bearing	Refer to Section G
Engine noise	Others: Exhaust gas leakage	Refer to Section F
Engine noise	Others: Malfunction of timing belt tensioner	Replace	B-12

Insufficient power

Possible CauseInsufficient compression: Malfunction of HLA*

RemedyReplace

PageB-20

Insufficient power

Possible CauseInsufficient compression: Compression leakage from valve seat

RemedyRepair

PageB-51

Insufficient power

Possible CauseInsufficient compression: Seized valve stem

RemedyReplace

PageB-49

Insufficient power

Possible CauseInsufficient compression: Weak or broken valve spring

RemedyReplace

PageB-52

Insufficient power

Possible CauseInsufficient compression: Failed cylinder head gasket

RemedyReplace

PageB-16

Insufficient power

Possible CauseInsufficient compression: Cracked or distorted cylinder head

RemedyReplace

PageB-48

Insufficient power

Possible CauseInsufficient compression: Sticking, damaged, or worn piston ring

RemedyReplace

PageB-56

Insufficient power

Possible CauseInsufficient compression: Cracked or worn piston

RemedyReplace

PageB-56

Insufficient power

Possible CauseMalfunction of fuel system

RemedyRefer to Section F

Page

Insufficient power

Possible CauseMalfunction of ignition system

RemedyRefer to Section G

Page

Insufficient power

Possible CauseOthers: Slipping clutch

RemedyRefer to Section H

Page

Insufficient power

Possible CauseOthers: Dragging brakes

RemedyRefer to Section P

Page

Insufficient power

Possible CauseOthers: Wrong size tires

RemedyRefer to Section Q

Page

Abnormal combustion

Possible CauseMalfunction of engine-related components: Malfunction of HLA*

RemedyReplace

PageB-20

Abnormal combustion

Possible CauseMalfunction of engine-related components: Sticking or burned valve

RemedyReplace

PageB-49

Abnormal combustion

Possible CauseMalfunction of engine-related components: Weak or broken valve spring

RemedyReplace

PageB-52

Abnormal combustion

Possible CauseMalfunction of engine-related components: Carbon accumulation in combustion chamber

RemedyEliminate carbon

Page—

Abnormal combustion

Possible CauseMalfunction of fuel system

RemedyRefer to Section F

Page

Abnormal combustion

Possible CauseMalfunction of ignition system

RemedyRefer to Section G

Page

Engine noise

Possible CauseCrankshaft- or bearing-related parts: Excessive main bearing oil clearance

RemedyReplace or repair

PageB-63

Engine noise

Possible CauseCrankshaft- or bearing-related parts: Main bearing seized or heat-damaged

RemedyReplace

PageB-58

Engine noise

Possible CauseCrankshaft- or bearing-related parts: Excessive crankshaft end play

RemedyReplace or repair

PageB-64

Engine noise

Possible CauseCrankshaft- or bearing-related parts: Excessive connecting rod oil clearance

RemedyReplace or repair

PageB-65

Engine noise

Possible CauseCrankshaft- or bearing-related parts: Connecting rod bearing seized or heat-damaged

RemedyReplace

PageB-58

Engine noise

Possible CausePiston-related parts: Worn cylinder

RemedyReplace or repair

PageB-54

Engine noise

Possible CausePiston-related parts: Worn piston or piston pin

RemedyReplace

PageB-57

Engine noise

Possible CausePiston-related parts: Seized piston

RemedyReplace

PageB-56

Engine noise

Possible CausePiston-related parts: Damaged piston ring

RemedyReplace

PageB-56

Engine noise

Possible CausePiston-related parts: Bent connecting rod

RemedyReplace

PageB-57

Engine noise

Possible CauseValves or timing-related parts: Malfunction of HLA*

RemedyReplace

PageB-20

Engine noise

Possible CauseValves or timing-related parts: Broken valve spring

RemedyReplace

PageB-52

Engine noise

Possible CauseValves or timing-related parts: Excessive valve guide clearance

RemedyReplace

PageB-49

Engine noise

Possible CauseMalfunction of cooling system

RemedyRefer to Section E

Page

Engine noise

Possible CauseMalfunction of fuel system

RemedyRefer to Section F

Page

Engine noise

Possible CauseOthers: Malfunction of water pump bearing

RemedyRefer to Section E

Page

Engine noise

Possible CauseOthers: Improper drive belt tension

RemedyAdjust

PageB-6

Engine noise

Possible CauseOthers: Malfunction of alternator bearing

RemedyRefer to Section G

Page

Engine noise

Possible CauseOthers: Exhaust gas leakage

RemedyRefer to Section F

Page

Engine noise

Possible CauseOthers: Malfunction of timing belt tensioner

RemedyReplace

PageB-12

NOTE

* Tappet noise may occur if the engine has set idle for an extended period. The noise should dissipate after the engine has reached normal operating temperature. (HLA troubleshooting: Refer to page B-7)

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TROUBLESHOOTING GUIDE

Troubleshooting Guide (continued)

See also

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